rm corejava第11版

corejava第11版/corejava/v1ch02/FXImageViewer/ImageViewer.java

@@ -1,67 +0,0 @@
-import java.io.*;
-import java.nio.file.*;
-
-import javafx.application.*;
-import javafx.scene.*;
-import javafx.scene.control.*;
-import javafx.scene.control.Alert.*;
-import javafx.scene.image.*;
-import javafx.scene.layout.*;
-import javafx.stage.*;
-import javafx.stage.FileChooser.*;
-
-/**
- * A program for viewing images.
- * @version 1.40 2017-12-10
- * @author Cay Horstmann
- */
-public class ImageViewer extends Application
-{
-   private static final int MIN_SIZE = 400;
-
-   public void start(Stage stage) throws IOException
-   {
-      BorderPane pane = new BorderPane();
-      MenuBar bar = new MenuBar();
-      pane.setTop(bar);
-      Menu fileMenu = new Menu("File");
-      bar.getMenus().add(fileMenu);
-      MenuItem openItem = new MenuItem("Open");
-      openItem.setOnAction(event -> load(stage, pane));
-      MenuItem exitItem = new MenuItem("Exit");
-      exitItem.setOnAction(event -> System.exit(0));
-      fileMenu.getItems().addAll(openItem, exitItem);
-      stage.setScene(new Scene(pane, MIN_SIZE, MIN_SIZE));
-      stage.setTitle("ImageViewer");
-      stage.show();
-   }
-
-   /**
-    * Loads an image.
-    * @param stage the stage above which to place the file chooser
-    * @param pane the pane into which to place the image view
-    */
-   public void load(Stage stage, BorderPane pane)
-   {
-      FileChooser fileChooser = new FileChooser();
-      fileChooser.getExtensionFilters().addAll(
-            new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"),
-            new ExtensionFilter("All Files", "*.*"));
-      File file = fileChooser.showOpenDialog(stage);
-      if (file != null)
-      {
-         try
-         {
-            Path path = file.toPath();
-            Image image = new Image(Files.newInputStream(path));
-            pane.setCenter(new ImageView(image));
-         }
-         catch (IOException e)
-         {
-            Alert alert = new Alert(AlertType.ERROR,
-               "Cannot open file.");
-            alert.showAndWait();
-         }
-      }
-   }
-}

corejava第11版/corejava/v1ch02/ImageViewer/ImageViewer.java

@@ -1,68 +0,0 @@
-import java.awt.*;
-import java.io.*;
-import javax.swing.*;
-
-/**
- * A program for viewing images.
- * @version 1.31 2018-04-10
- * @author Cay Horstmann
- */
-public class ImageViewer
-{
-   public static void main(String[] args)
-   {
-      EventQueue.invokeLater(() -> {
-         var frame = new ImageViewerFrame();
-         frame.setTitle("ImageViewer");
-         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-         frame.setVisible(true);
-      });
-   }
-}
-
-/**
- * A frame with a label to show an image.
- */
-class ImageViewerFrame extends JFrame
-{
-   private static final int DEFAULT_WIDTH = 300;
-   private static final int DEFAULT_HEIGHT = 400;
-
-   public ImageViewerFrame()
-   {
-      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
-
-      // use a label to display the images
-      var label = new JLabel();
-      add(label);
-
-      // set up the file chooser
-      var chooser = new JFileChooser();
-      chooser.setCurrentDirectory(new File("."));
-
-      // set up the menu bar
-      var menuBar = new JMenuBar();
-      setJMenuBar(menuBar);
-
-      var menu = new JMenu("File");
-      menuBar.add(menu);
-
-      var openItem = new JMenuItem("Open");
-      menu.add(openItem);
-      openItem.addActionListener(event -> {
-         // show file chooser dialog
-         int result = chooser.showOpenDialog(null);
-
-         // if file selected, set it as icon of the label
-         if (result == JFileChooser.APPROVE_OPTION)
-         {
-            String name = chooser.getSelectedFile().getPath();
-            label.setIcon(new ImageIcon(name));
-         }
-      });
-
-      var exitItem = new JMenuItem("Exit");
-      menu.add(exitItem);
-      exitItem.addActionListener(event -> System.exit(0));
-   }
-}

corejava第11版/corejava/v1ch02/Welcome/Welcome.java

@@ -1,16 +0,0 @@
-/**
- * This program displays a greeting for the reader.
- * @version 1.30 2014-02-27
- * @author Cay Horstmann
- */
-public class Welcome
-{
-   public static void main(String[] args)
-   {
-      String greeting = "Welcome to Core Java!";
-      System.out.println(greeting);
-      for (int i = 0; i < greeting.length(); i++)
-         System.out.print("=");
-      System.out.println();
-   }
-}

corejava第11版/corejava/v1ch03/BigIntegerTest/BigIntegerTest.java

@@ -1,33 +0,0 @@
-import java.math.*;
-import java.util.*;
-
-/**
- * This program uses big numbers to compute the odds of winning the grand prize in a lottery.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class BigIntegerTest
-{
-   public static void main(String[] args)
-   {
-      Scanner in = new Scanner(System.in);
-
-      System.out.print("How many numbers do you need to draw? ");
-      int k = in.nextInt();
-
-      System.out.print("What is the highest number you can draw? ");
-      int n = in.nextInt();
-
-      /*
-       * compute binomial coefficient n*(n-1)*(n-2)*...*(n-k+1)/(1*2*3*...*k)
-       */
-
-      BigInteger lotteryOdds = BigInteger.valueOf(1);
-
-      for (int i = 1; i <= k; i++)
-         lotteryOdds = lotteryOdds.multiply(BigInteger.valueOf(n - i + 1)).divide(
-            BigInteger.valueOf(i));
-
-      System.out.println("Your odds are 1 in " + lotteryOdds + ". Good luck!");
-   }
-}

corejava第11版/corejava/v1ch03/CompoundInterest/CompoundInterest.java

@@ -1,57 +0,0 @@
-/**
- * This program shows how to store tabular data in a 2D array.
- * @version 1.40 2004-02-10
- * @author Cay Horstmann
- */
-public class CompoundInterest
-{
-   public static void main(String[] args)
-   {
-      final double STARTRATE = 10;
-      final int NRATES = 6;
-      final int NYEARS = 10;
-
-      // set interest rates to 10 . . . 15%
-      double[] interestRate = new double[NRATES];
-      for (int j = 0; j < interestRate.length; j++)
-         interestRate[j] = (STARTRATE + j) / 100.0;
-
-      double[][] balances = new double[NYEARS][NRATES];
-
-      // set initial balances to 10000
-      for (int j = 0; j < balances[0].length; j++)
-         balances[0][j] = 10000;
-
-      // compute interest for future years
-      for (int i = 1; i < balances.length; i++)
-      {
-         for (int j = 0; j < balances[i].length; j++)
-         {
-            // get last year's balances from previous row
-            double oldBalance = balances[i - 1][j];
-
-            // compute interest
-            double interest = oldBalance * interestRate[j];
-
-            // compute this year's balances
-            balances[i][j] = oldBalance + interest;
-         }
-      }
-
-      // print one row of interest rates
-      for (int j = 0; j < interestRate.length; j++)
-         System.out.printf("%9.0f%%", 100 * interestRate[j]);
-
-      System.out.println();
-
-      // print balance table
-      for (double[] row : balances)
-      {
-         // print table row
-         for (double b : row)
-            System.out.printf("%10.2f", b);
-
-         System.out.println();
-      }
-   }
-}

corejava第11版/corejava/v1ch03/FirstSample/FirstSample.java

@@ -1,12 +0,0 @@
-/**
- * This is the first sample program in Core Java Chapter 3
- * @version 1.01 1997-03-22
- * @author Gary Cornell
- */
-public class FirstSample
-{
-   public static void main(String[] args)
-   {
-      System.out.println("We will not use 'Hello, World!'");
-   }
-}

corejava第11版/corejava/v1ch03/InputTest/InputTest.java

@@ -1,25 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates console input.
- * @version 1.10 2004-02-10
- * @author Cay Horstmann
- */
-public class InputTest
-{
-   public static void main(String[] args)
-   {
-      Scanner in = new Scanner(System.in);
-
-      // get first input
-      System.out.print("What is your name? ");
-      String name = in.nextLine();
-
-      // get second input
-      System.out.print("How old are you? ");
-      int age = in.nextInt();
-
-      // display output on console
-      System.out.println("Hello, " + name + ". Next year, you'll be " + (age + 1));
-   }
-}

corejava第11版/corejava/v1ch03/LotteryArray/LotteryArray.java

@@ -1,39 +0,0 @@
-/**
- * This program demonstrates a triangular array.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class LotteryArray
-{
-   public static void main(String[] args)
-   {
-      final int NMAX = 10;
-
-      // allocate triangular array
-      int[][] odds = new int[NMAX + 1][];
-      for (int n = 0; n <= NMAX; n++)
-         odds[n] = new int[n + 1];
-
-      // fill triangular array
-      for (int n = 0; n < odds.length; n++)
-         for (int k = 0; k < odds[n].length; k++)
-         {
-            /*
-             * compute binomial coefficient n*(n-1)*(n-2)*...*(n-k+1)/(1*2*3*...*k)
-             */
-            int lotteryOdds = 1;
-            for (int i = 1; i <= k; i++)
-               lotteryOdds = lotteryOdds * (n - i + 1) / i;
-
-            odds[n][k] = lotteryOdds;
-         }
-
-      // print triangular array
-      for (int[] row : odds)
-      {
-         for (int odd : row)
-            System.out.printf("%4d", odd);
-         System.out.println();
-      }
-   }
-}

corejava第11版/corejava/v1ch03/LotteryDrawing/LotteryDrawing.java

@@ -1,46 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates array manipulation.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class LotteryDrawing
-{
-   public static void main(String[] args)
-   {
-      Scanner in = new Scanner(System.in);
-
-      System.out.print("How many numbers do you need to draw? ");
-      int k = in.nextInt();
-
-      System.out.print("What is the highest number you can draw? ");
-      int n = in.nextInt();
-
-      // fill an array with numbers 1 2 3 . . . n
-      int[] numbers = new int[n];
-      for (int i = 0; i < numbers.length; i++)
-         numbers[i] = i + 1;
-
-      // draw k numbers and put them into a second array
-      int[] result = new int[k];
-      for (int i = 0; i < result.length; i++)
-      {
-         // make a random index between 0 and n - 1
-         int r = (int) (Math.random() * n);
-
-         // pick the element at the random location
-         result[i] = numbers[r];
-
-         // move the last element into the random location
-         numbers[r] = numbers[n - 1];
-         n--;
-      }
-
-      // print the sorted array
-      Arrays.sort(result);
-      System.out.println("Bet the following combination. It'll make you rich!");
-      for (int r : result)
-         System.out.println(r);
-   }
-}

corejava第11版/corejava/v1ch03/LotteryOdds/LotteryOdds.java

@@ -1,30 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates a <code>for</code> loop.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class LotteryOdds
-{
-   public static void main(String[] args)
-   {
-      Scanner in = new Scanner(System.in);
-
-      System.out.print("How many numbers do you need to draw? ");
-      int k = in.nextInt();
-
-      System.out.print("What is the highest number you can draw? ");
-      int n = in.nextInt();
-
-      /*
-       * compute binomial coefficient n*(n-1)*(n-2)*...*(n-k+1)/(1*2*3*...*k)
-       */
-
-      int lotteryOdds = 1;
-      for (int i = 1; i <= k; i++)
-         lotteryOdds = lotteryOdds * (n - i + 1) / i;
-
-      System.out.println("Your odds are 1 in " + lotteryOdds + ". Good luck!");
-   }
-}

corejava第11版/corejava/v1ch03/Retirement/Retirement.java

@@ -1,39 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates a <code>while</code> loop.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class Retirement
-{
-   public static void main(String[] args)
-   {
-      // read inputs
-      Scanner in = new Scanner(System.in);
-
-      System.out.print("How much money do you need to retire? ");
-      double goal = in.nextDouble();
-
-      System.out.print("How much money will you contribute every year? ");
-      double payment = in.nextDouble();
-
-      System.out.print("Interest rate in %: ");
-      double interestRate = in.nextDouble();
-
-      double balance = 0;
-      int years = 0;
-
-      // update account balance while goal isn't reached
-      while (balance < goal)
-      {
-         // add this year's payment and interest
-         balance += payment;
-         double interest = balance * interestRate / 100;
-         balance += interest;
-         years++;
-      }
-
-      System.out.println("You can retire in " + years + " years.");
-   }
-}

corejava第11版/corejava/v1ch03/Retirement2/Retirement2.java

@@ -1,44 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates a <code>do/while</code> loop.
- * @version 1.20 2004-02-10
- * @author Cay Horstmann
- */
-public class Retirement2
-{
-   public static void main(String[] args)
-   {
-      Scanner in = new Scanner(System.in);
-
-      System.out.print("How much money will you contribute every year? ");
-      double payment = in.nextDouble();
-
-      System.out.print("Interest rate in %: ");
-      double interestRate = in.nextDouble();
-
-      double balance = 0;
-      int year = 0;
-
-      String input;
-
-      // update account balance while user isn't ready to retire
-      do
-      {
-         // add this year's payment and interest
-         balance += payment;
-         double interest = balance * interestRate / 100;
-         balance += interest;
-
-         year++;
-
-         // print current balance
-         System.out.printf("After year %d, your balance is %,.2f%n", year, balance);
-
-         // ask if ready to retire and get input
-         System.out.print("Ready to retire? (Y/N) ");
-         input = in.next();
-      }
-      while (input.equals("N"));
-   }
-}

corejava第11版/corejava/v1ch04/CalendarTest/CalendarTest.java

@@ -1,34 +0,0 @@
-import java.time.*;
-
-/**
- * @version 1.5 2015-05-08
- * @author Cay Horstmann
- */
-public class CalendarTest
-{
-   public static void main(String[] args)
-   {
-      LocalDate date = LocalDate.now();
-      int month = date.getMonthValue();
-      int today = date.getDayOfMonth();
-
-      date = date.minusDays(today - 1); // set to start of month
-      DayOfWeek weekday = date.getDayOfWeek();
-      int value = weekday.getValue(); // 1 = Monday, . . . , 7 = Sunday
-
-      System.out.println("Mon Tue Wed Thu Fri Sat Sun");
-      for (int i = 1; i < value; i++)
-         System.out.print("    ");
-      while (date.getMonthValue() == month)
-      {
-         System.out.printf("%3d", date.getDayOfMonth());
-         if (date.getDayOfMonth() == today)
-            System.out.print("*");
-         else
-            System.out.print(" ");
-         date = date.plusDays(1);
-         if (date.getDayOfWeek().getValue() == 1) System.out.println();
-      }
-      if (date.getDayOfWeek().getValue() != 1) System.out.println();
-   }
-}

corejava第11版/corejava/v1ch04/ConstructorTest/ConstructorTest.java

@@ -1,83 +0,0 @@
-import java.util.*;
-
-/**
- * This program demonstrates object construction.
- * @version 1.02 2018-04-10
- * @author Cay Horstmann
- */
-public class ConstructorTest
-{
-   public static void main(String[] args)
-   {
-      // fill the staff array with three Employee objects
-      var staff = new Employee[3];
-
-      staff[0] = new Employee("Harry", 40000);
-      staff[1] = new Employee(60000);
-      staff[2] = new Employee();
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-         System.out.println("name=" + e.getName() + ",id=" + e.getId() + ",salary="
-            + e.getSalary());
-   }
-}
-
-class Employee
-{
-   private static int nextId;
-
-   private int id;
-   private String name = ""; // instance field initialization
-   private double salary;
-  
-   // static initialization block
-   static
-   {
-      var generator = new Random();
-      // set nextId to a random number between 0 and 9999
-      nextId = generator.nextInt(10000);
-   }
-
-   // object initialization block
-   {
-      id = nextId;
-      nextId++;
-   }
-
-   // three overloaded constructors
-   public Employee(String n, double s)
-   {
-      name = n;
-      salary = s;
-   }
-
-   public Employee(double s)
-   {
-      // calls the Employee(String, double) constructor
-      this("Employee #" + nextId, s);
-   }
-
-   // the default constructor
-   public Employee()
-   {
-      // name initialized to ""--see above
-      // salary not explicitly set--initialized to 0
-      // id initialized in initialization block
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public int getId()
-   {
-      return id;
-   }
-}

corejava第11版/corejava/v1ch04/EmployeeTest/EmployeeTest.java

@@ -1,63 +0,0 @@
-import java.time.*;
-
-/**
- * This program tests the Employee class.
- * @version 1.13 2018-04-10
- * @author Cay Horstmann
- */
-public class EmployeeTest
-{
-   public static void main(String[] args)
-   {
-      // fill the staff array with three Employee objects
-      Employee[] staff = new Employee[3];
-
-      staff[0] = new Employee("Carl Cracker", 75000, 1987, 12, 15);
-      staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
-      staff[2] = new Employee("Tony Tester", 40000, 1990, 3, 15);
-
-      // raise everyone's salary by 5%
-      for (Employee e : staff)
-         e.raiseSalary(5);
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-         System.out.println("name=" + e.getName() + ",salary=" + e.getSalary() + ",hireDay=" 
-            + e.getHireDay());
-   }
-}
-
-class Employee
-{
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String n, double s, int year, int month, int day)
-   {
-      name = n;
-      salary = s;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch04/PackageTest/PackageTest.java

@@ -1,24 +0,0 @@
-import com.horstmann.corejava.*;
-// the Employee class is defined in that package
-
-import static java.lang.System.*;
-
-/**
- * This program demonstrates the use of packages.
- * @version 1.11 2004-02-19
- * @author Cay Horstmann
- */
-public class PackageTest
-{
-   public static void main(String[] args)
-   {
-      // because of the import statement, we don't have to use 
-      // com.horstmann.corejava.Employee here
-      var harry = new Employee("Harry Hacker", 50000, 1989, 10, 1);
-
-      harry.raiseSalary(5);
-
-      // because of the static import statement, we don't have to use System.out here
-      out.println("name=" + harry.getName() + ",salary=" + harry.getSalary());
-   }
-}

corejava第11版/corejava/v1ch04/PackageTest/com/horstmann/corejava/Employee.java

@@ -1,46 +0,0 @@
-package com.horstmann.corejava;
-
-// the classes in this file are part of this package
-
-import java.time.*;
-
-// import statements come after the package statement
-
-/**
- * @version 1.11 2015-05-08
- * @author Cay Horstmann
- */
-public class Employee
-{
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch04/ParamTest/ParamTest.java

@@ -1,89 +0,0 @@
-/**
- * This program demonstrates parameter passing in Java.
- * @version 1.01 2018-04-10
- * @author Cay Horstmann
- */
-public class ParamTest
-{
-   public static void main(String[] args)
-   {
-      /*
-       * Test 1: Methods can't modify numeric parameters
-       */
-      System.out.println("Testing tripleValue:");
-      double percent = 10;
-      System.out.println("Before: percent=" + percent);
-      tripleValue(percent);
-      System.out.println("After: percent=" + percent);
-
-      /*
-       * Test 2: Methods can change the state of object parameters
-       */
-      System.out.println("\nTesting tripleSalary:");
-      var harry = new Employee("Harry", 50000);
-      System.out.println("Before: salary=" + harry.getSalary());
-      tripleSalary(harry);
-      System.out.println("After: salary=" + harry.getSalary());
-
-      /*
-       * Test 3: Methods can't attach new objects to object parameters
-       */
-      System.out.println("\nTesting swap:");
-      var a = new Employee("Alice", 70000);
-      var b = new Employee("Bob", 60000);
-      System.out.println("Before: a=" + a.getName());
-      System.out.println("Before: b=" + b.getName());
-      swap(a, b);
-      System.out.println("After: a=" + a.getName());
-      System.out.println("After: b=" + b.getName());
-   }
-
-   public static void tripleValue(double x) // doesn't work
-   {
-      x = 3 * x;
-      System.out.println("End of method: x=" + x);
-   }
-
-   public static void tripleSalary(Employee x) // works
-   {
-      x.raiseSalary(200);
-      System.out.println("End of method: salary=" + x.getSalary());
-   }
-
-   public static void swap(Employee x, Employee y)
-   {
-      Employee temp = x;
-      x = y;
-      y = temp;
-      System.out.println("End of method: x=" + x.getName());
-      System.out.println("End of method: y=" + y.getName());
-   }
-}
-
-class Employee // simplified Employee class
-{
-   private String name;
-   private double salary;
-
-   public Employee(String n, double s)
-   {
-      name = n;
-      salary = s;
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch04/StaticTest/StaticTest.java

@@ -1,76 +0,0 @@
-/**
- * This program demonstrates static methods.
- * @version 1.02 2008-04-10
- * @author Cay Horstmann
- */
-public class StaticTest
-{
-   public static void main(String[] args)
-   {
-      // fill the staff array with three Employee objects
-      var staff = new Employee[3];
-
-      staff[0] = new Employee("Tom", 40000);
-      staff[1] = new Employee("Dick", 60000);
-      staff[2] = new Employee("Harry", 65000);
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-      {
-         e.setId();
-         System.out.println("name=" + e.getName() + ",id=" + e.getId() + ",salary="
-            + e.getSalary());
-      }
-
-      int n = Employee.getNextId(); // calls static method
-      System.out.println("Next available id=" + n);
-   }
-}
-
-class Employee
-{
-   private static int nextId = 1;
-
-   private String name;
-   private double salary;
-   private int id;
-
-   public Employee(String n, double s)
-   {
-      name = n;
-      salary = s;
-      id = 0;
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public int getId()
-   {
-      return id;
-   }
-
-   public void setId()
-   {
-      id = nextId; // set id to next available id
-      nextId++;
-   }
-
-   public static int getNextId()
-   {
-      return nextId; // returns static field
-   }
-
-   public static void main(String[] args) // unit test
-   {
-      var e = new Employee("Harry", 50000);
-      System.out.println(e.getName() + " " + e.getSalary());
-   }
-}

corejava第11版/corejava/v1ch05/abstractClasses/Employee.java

@@ -1,37 +0,0 @@
-package abstractClasses;
-
-import java.time.*;
-
-public class Employee extends Person
-{
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      super(name);
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public String getDescription()
-   {
-      return String.format("an employee with a salary of $%.2f", salary);
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch05/abstractClasses/Person.java

@@ -1,17 +0,0 @@
-package abstractClasses;
-
-public abstract class Person
-{
-   public abstract String getDescription();
-   private String name;
-
-   public Person(String name)
-   {
-      this.name = name;
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-}

corejava第11版/corejava/v1ch05/abstractClasses/PersonTest.java

@@ -1,22 +0,0 @@
-package abstractClasses;
-
-/**
- * This program demonstrates abstract classes.
- * @version 1.01 2004-02-21
- * @author Cay Horstmann
- */
-public class PersonTest
-{
-   public static void main(String[] args)
-   {
-      var people = new Person[2];
-
-      // fill the people array with Student and Employee objects
-      people[0] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
-      people[1] = new Student("Maria Morris", "computer science");
-
-      // print out names and descriptions of all Person objects
-      for (Person p : people)
-         System.out.println(p.getName() + ", " + p.getDescription());
-   }
-}

corejava第11版/corejava/v1ch05/abstractClasses/Student.java

@@ -1,22 +0,0 @@
-package abstractClasses;
-
-public class Student extends Person
-{
-   private String major;
-
-   /**
-    * @param name the student's name
-    * @param major the student's major
-    */
-   public Student(String name, String major)
-   {
-      // pass name to superclass constructor
-      super(name);
-      this.major = major;
-   }
-
-   public String getDescription()
-   {
-      return "a student majoring in " + major;
-   }
-}

corejava第11版/corejava/v1ch05/arrayList/ArrayListTest.java

@@ -1,30 +0,0 @@
-package arrayList;
-
-import java.util.*;
-
-/**
- * This program demonstrates the ArrayList class.
- * @version 1.11 2012-01-26
- * @author Cay Horstmann
- */
-public class ArrayListTest
-{
-   public static void main(String[] args)
-   {
-      // fill the staff array list with three Employee objects
-      var staff = new ArrayList<Employee>();
-
-      staff.add(new Employee("Carl Cracker", 75000, 1987, 12, 15));
-      staff.add(new Employee("Harry Hacker", 50000, 1989, 10, 1));
-      staff.add(new Employee("Tony Tester", 40000, 1990, 3, 15));
-
-      // raise everyone's salary by 5%
-      for (Employee e : staff)
-         e.raiseSalary(5);
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-         System.out.println("name=" + e.getName() + ",salary=" + e.getSalary() + ",hireDay=" 
-            + e.getHireDay());
-   }
-}

corejava第11版/corejava/v1ch05/arrayList/Employee.java

@@ -1,38 +0,0 @@
-package arrayList;
-
-import java.time.*;
-
-public class Employee
-{
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch05/arrays/CopyOfTest.java

@@ -1,58 +0,0 @@
-package arrays;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-/**
- * This program demonstrates the use of reflection for manipulating arrays.
- * @version 1.2 2012-05-04
- * @author Cay Horstmann
- */
-public class CopyOfTest
-{
-   public static void main(String[] args)
-   {
-      int[] a = { 1, 2, 3 };
-      a = (int[]) goodCopyOf(a, 10);
-      System.out.println(Arrays.toString(a));
-
-      String[] b = { "Tom", "Dick", "Harry" };
-      b = (String[]) goodCopyOf(b, 10);
-      System.out.println(Arrays.toString(b));
-
-      System.out.println("The following call will generate an exception.");
-      b = (String[]) badCopyOf(b, 10);
-   }
-
-   /**
-    * This method attempts to grow an array by allocating a new array and copying all elements.
-    * @param a the array to grow
-    * @param newLength the new length
-    * @return a larger array that contains all elements of a. However, the returned 
-    * array has type Object[], not the same type as a
-    */
-   public static Object[] badCopyOf(Object[] a, int newLength) // not useful
-   {
-      var newArray = new Object[newLength];
-      System.arraycopy(a, 0, newArray, 0, Math.min(a.length, newLength));
-      return newArray;
-   }
-
-   /**
-    * This method grows an array by allocating a new array of the same type and
-    * copying all elements.
-    * @param a the array to grow. This can be an object array or a primitive
-    * type array
-    * @return a larger array that contains all elements of a.
-    */
-   public static Object goodCopyOf(Object a, int newLength) 
-   {
-      Class cl = a.getClass();
-      if (!cl.isArray()) return null;
-      Class componentType = cl.getComponentType();
-      int length = Array.getLength(a);
-      Object newArray = Array.newInstance(componentType, newLength);
-      System.arraycopy(a, 0, newArray, 0, Math.min(length, newLength));
-      return newArray;
-   }
-}

corejava第11版/corejava/v1ch05/corejava/title.txt

@@ -1 +0,0 @@
-Core Java

corejava第11版/corejava/v1ch05/enums/EnumTest.java

@@ -1,33 +0,0 @@
-package enums;
-
-import java.util.*;
-
-/**
- * This program demonstrates enumerated types.
- * @version 1.0 2004-05-24
- * @author Cay Horstmann
- */
-public class EnumTest
-{  
-   public static void main(String[] args)
-   {  
-      var in = new Scanner(System.in);
-      System.out.print("Enter a size: (SMALL, MEDIUM, LARGE, EXTRA_LARGE) ");
-      String input = in.next().toUpperCase();
-      Size size = Enum.valueOf(Size.class, input);
-      System.out.println("size=" + size);
-      System.out.println("abbreviation=" + size.getAbbreviation());
-      if (size == Size.EXTRA_LARGE)
-         System.out.println("Good job--you paid attention to the _.");      
-   }
-}
-
-enum Size
-{
-   SMALL("S"), MEDIUM("M"), LARGE("L"), EXTRA_LARGE("XL");
-
-   private Size(String abbreviation) { this.abbreviation = abbreviation; }
-   public String getAbbreviation() { return abbreviation; }
-
-   private String abbreviation;
-}

corejava第11版/corejava/v1ch05/equals/Employee.java

@@ -1,69 +0,0 @@
-package equals;
-
-import java.time.*;
-import java.util.Objects;
-
-public class Employee
-{
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-
-   public boolean equals(Object otherObject)
-   {
-      // a quick test to see if the objects are identical
-      if (this == otherObject) return true;
-
-      // must return false if the explicit parameter is null
-      if (otherObject == null) return false;
-
-      // if the classes don't match, they can't be equal
-      if (getClass() != otherObject.getClass()) return false;
-
-      // now we know otherObject is a non-null Employee
-      var other = (Employee) otherObject;
-
-      // test whether the fields have identical values
-      return Objects.equals(name, other.name) 
-         && salary == other.salary && Objects.equals(hireDay, other.hireDay);
-   }
-
-   public int hashCode()
-   {
-      return Objects.hash(name, salary, hireDay); 
-   }
-
-   public String toString()
-   {
-      return getClass().getName() + "[name=" + name + ",salary=" + salary + ",hireDay=" 
-         + hireDay + "]";
-   }
-}

corejava第11版/corejava/v1ch05/equals/EqualsTest.java

@@ -1,37 +0,0 @@
-package equals;
-
-/**
- * This program demonstrates the equals method.
- * @version 1.12 2012-01-26
- * @author Cay Horstmann
- */
-public class EqualsTest
-{
-   public static void main(String[] args)
-   {
-      var alice1 = new Employee("Alice Adams", 75000, 1987, 12, 15);
-      var alice2 = alice1;
-      var alice3 = new Employee("Alice Adams", 75000, 1987, 12, 15);
-      var bob = new Employee("Bob Brandson", 50000, 1989, 10, 1);
-
-      System.out.println("alice1 == alice2: " + (alice1 == alice2));
-
-      System.out.println("alice1 == alice3: " + (alice1 == alice3));
-
-      System.out.println("alice1.equals(alice3): " + alice1.equals(alice3));
-
-      System.out.println("alice1.equals(bob): " + alice1.equals(bob));
-
-      System.out.println("bob.toString(): " + bob);
-
-      var carl = new Manager("Carl Cracker", 80000, 1987, 12, 15);
-      var boss = new Manager("Carl Cracker", 80000, 1987, 12, 15);
-      boss.setBonus(5000);
-      System.out.println("boss.toString(): " + boss);
-      System.out.println("carl.equals(boss): " + carl.equals(boss));
-      System.out.println("alice1.hashCode(): " + alice1.hashCode());
-      System.out.println("alice3.hashCode(): " + alice3.hashCode());
-      System.out.println("bob.hashCode(): " + bob.hashCode());
-      System.out.println("carl.hashCode(): " + carl.hashCode());
-   }
-}

corejava第11版/corejava/v1ch05/equals/Manager.java

@@ -1,42 +0,0 @@
-package equals;
-
-public class Manager extends Employee
-{
-   private double bonus;
-
-   public Manager(String name, double salary, int year, int month, int day)
-   {
-      super(name, salary, year, month, day);
-      bonus = 0;
-   }
-
-   public double getSalary()
-   {
-      double baseSalary = super.getSalary();
-      return baseSalary + bonus;
-   }
-
-   public void setBonus(double bonus)
-   {
-      this.bonus = bonus;
-   }
-
-   public boolean equals(Object otherObject)
-   {
-      if (!super.equals(otherObject)) return false;
-      var other = (Manager) otherObject;
-      // super.equals checked that this and other belong to the same class
-      return bonus == other.bonus;
-   }
-
-   public int hashCode()
-   {
-      return java.util.Objects.hash(super.hashCode(), bonus);
-   }
-
-   public String toString()
-   {
-      return super.toString() + "[bonus=" + bonus + "]";
-   }
-}
-

corejava第11版/corejava/v1ch05/inheritance/Employee.java

@@ -1,38 +0,0 @@
-package inheritance;
-
-import java.time.*;
-
-public class Employee
-{
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}

corejava第11版/corejava/v1ch05/inheritance/Manager.java

@@ -1,30 +0,0 @@
-package inheritance;
-
-public class Manager extends Employee
-{
-   private double bonus;
-
-   /**
-    * @param name the employee's name
-    * @param salary the salary
-    * @param year the hire year
-    * @param month the hire month
-    * @param day the hire day
-    */
-   public Manager(String name, double salary, int year, int month, int day)
-   {
-      super(name, salary, year, month, day);
-      bonus = 0;
-   }
-
-   public double getSalary()
-   {
-      double baseSalary = super.getSalary();
-      return baseSalary + bonus;
-   }
-
-   public void setBonus(double b)
-   {
-      bonus = b;
-   }
-}

corejava第11版/corejava/v1ch05/inheritance/ManagerTest.java

@@ -1,28 +0,0 @@
-package inheritance;
-
-/**
- * This program demonstrates inheritance.
- * @version 1.21 2004-02-21
- * @author Cay Horstmann
- */
-public class ManagerTest
-{
-   public static void main(String[] args)
-   {
-      // construct a Manager object
-      var boss = new Manager("Carl Cracker", 80000, 1987, 12, 15);
-      boss.setBonus(5000);
-
-      var staff = new Employee[3];
-
-      // fill the staff array with Manager and Employee objects
-
-      staff[0] = boss;
-      staff[1] = new Employee("Harry Hacker", 50000, 1989, 10, 1);
-      staff[2] = new Employee("Tommy Tester", 40000, 1990, 3, 15);
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-         System.out.println("name=" + e.getName() + ",salary=" + e.getSalary());
-   }
-}

corejava第11版/corejava/v1ch05/methods/MethodTableTest.java

@@ -1,55 +0,0 @@
-package methods;
-
-import java.lang.reflect.*;
-
-/**
- * This program shows how to invoke methods through reflection.
- * @version 1.2 2012-05-04
- * @author Cay Horstmann
- */
-public class MethodTableTest
-{
-   public static void main(String[] args)
-         throws ReflectiveOperationException
-   {
-      // get method pointers to the square and sqrt methods
-      Method square = MethodTableTest.class.getMethod("square", double.class);
-      Method sqrt = Math.class.getMethod("sqrt", double.class);
-
-      // print tables of x- and y-values
-      printTable(1, 10, 10, square);
-      printTable(1, 10, 10, sqrt);
-   }
-
-   /**
-    * Returns the square of a number
-    * @param x a number
-    * @return x squared
-    */
-   public static double square(double x)
-   {
-      return x * x;
-   }
-
-   /**
-    * Prints a table with x- and y-values for a method
-    * @param from the lower bound for the x-values
-    * @param to the upper bound for the x-values
-    * @param n the number of rows in the table
-    * @param f a method with a double parameter and double return value
-    */
-   public static void printTable(double from, double to, int n, Method f)
-         throws ReflectiveOperationException
-   {
-      // print out the method as table header
-      System.out.println(f);
-
-      double dx = (to - from) / (n - 1);
-
-      for (double x = from; x <= to; x += dx)
-      {
-         double y = (Double) f.invoke(null, x);
-         System.out.printf("%10.4f | %10.4f%n", x, y);
-      }
-   }
-}

corejava第11版/corejava/v1ch05/objectAnalyzer/ObjectAnalyzer.java

@@ -1,66 +0,0 @@
-package objectAnalyzer;
-
-import java.lang.reflect.AccessibleObject;
-import java.lang.reflect.Array;
-import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
-import java.util.ArrayList;
-
-public class ObjectAnalyzer
-{
-   private ArrayList<Object> visited = new ArrayList<>();
-
-   /**
-    * Converts an object to a string representation that lists all fields.
-    * @param obj an object
-    * @return a string with the object's class name and all field names and values
-    */
-   public String toString(Object obj)
-         throws ReflectiveOperationException
-   {
-      if (obj == null) return "null";
-      if (visited.contains(obj)) return "...";
-      visited.add(obj);
-      Class cl = obj.getClass();
-      if (cl == String.class) return (String) obj;
-      if (cl.isArray())
-      {
-         String r = cl.getComponentType() + "[]{";
-         for (int i = 0; i < Array.getLength(obj); i++)
-         {
-            if (i > 0) r += ",";
-            Object val = Array.get(obj, i);
-            if (cl.getComponentType().isPrimitive()) r += val;
-            else r += toString(val);
-         }
-         return r + "}";
-      }
-
-      String r = cl.getName();
-      // inspect the fields of this class and all superclasses
-      do
-      {
-         r += "[";
-         Field[] fields = cl.getDeclaredFields();
-         AccessibleObject.setAccessible(fields, true);
-         // get the names and values of all fields
-         for (Field f : fields)
-         {
-            if (!Modifier.isStatic(f.getModifiers()))
-            {
-               if (!r.endsWith("[")) r += ",";
-               r += f.getName() + "=";
-               Class t = f.getType();
-               Object val = f.get(obj);
-               if (t.isPrimitive()) r += val;
-               else r += toString(val);
-            }
-         }
-         r += "]";
-         cl = cl.getSuperclass();
-      }
-      while (cl != null);
-
-      return r;
-   }
-}

corejava第11版/corejava/v1ch05/objectAnalyzer/ObjectAnalyzerTest.java

@@ -1,20 +0,0 @@
-package objectAnalyzer;
-
-import java.util.*;
-
-/**
- * This program uses reflection to spy on objects.
- * @version 1.13 2018-03-16
- * @author Cay Horstmann
- */
-public class ObjectAnalyzerTest
-{
-   public static void main(String[] args)
-         throws ReflectiveOperationException
-   {
-      var squares = new ArrayList<Integer>();
-      for (int i = 1; i <= 5; i++)
-         squares.add(i * i);
-      System.out.println(new ObjectAnalyzer().toString(squares));
-   }
-}

corejava第11版/corejava/v1ch05/reflection/ReflectionTest.java

@@ -1,119 +0,0 @@
-package reflection;
-
-import java.util.*;
-import java.lang.reflect.*;
-
-/**
- * This program uses reflection to print all features of a class.
- * @version 1.11 2018-03-16
- * @author Cay Horstmann
- */
-public class ReflectionTest
-{
-   public static void main(String[] args)
-         throws ReflectiveOperationException      
-   {
-      // read class name from command line args or user input
-      String name;
-      if (args.length > 0) name = args[0];
-      else
-      {
-         var in = new Scanner(System.in);
-         System.out.println("Enter class name (e.g. java.util.Date): ");
-         name = in.next();
-      }
-
-      // print class name and superclass name (if != Object)
-      Class cl = Class.forName(name);
-      Class supercl = cl.getSuperclass();
-      String modifiers = Modifier.toString(cl.getModifiers());
-      if (modifiers.length() > 0) System.out.print(modifiers + " ");
-      System.out.print("class " + name);
-      if (supercl != null && supercl != Object.class) System.out.print(" extends "
-            + supercl.getName());
-
-      System.out.print("\n{\n");
-      printConstructors(cl);
-      System.out.println();
-      printMethods(cl);
-      System.out.println();
-      printFields(cl);
-      System.out.println("}");
-   }
-
-   /**
-    * Prints all constructors of a class
-    * @param cl a class
-    */
-   public static void printConstructors(Class cl)
-   {
-      Constructor[] constructors = cl.getDeclaredConstructors();
-
-      for (Constructor c : constructors)
-      {
-         String name = c.getName();
-         System.out.print("   ");
-         String modifiers = Modifier.toString(c.getModifiers());
-         if (modifiers.length() > 0) System.out.print(modifiers + " ");         
-         System.out.print(name + "(");
-
-         // print parameter types
-         Class[] paramTypes = c.getParameterTypes();
-         for (int j = 0; j < paramTypes.length; j++)
-         {
-            if (j > 0) System.out.print(", ");
-            System.out.print(paramTypes[j].getName());
-         }
-         System.out.println(");");
-      }
-   }
-
-   /**
-    * Prints all methods of a class
-    * @param cl a class
-    */
-   public static void printMethods(Class cl)
-   {
-      Method[] methods = cl.getDeclaredMethods();
-
-      for (Method m : methods)
-      {
-         Class retType = m.getReturnType();
-         String name = m.getName();
-
-         System.out.print("   ");
-         // print modifiers, return type and method name
-         String modifiers = Modifier.toString(m.getModifiers());
-         if (modifiers.length() > 0) System.out.print(modifiers + " ");         
-         System.out.print(retType.getName() + " " + name + "(");
-
-         // print parameter types
-         Class[] paramTypes = m.getParameterTypes();
-         for (int j = 0; j < paramTypes.length; j++)
-         {
-            if (j > 0) System.out.print(", ");
-            System.out.print(paramTypes[j].getName());
-         }
-         System.out.println(");");
-      }
-   }
-
-   /**
-    * Prints all fields of a class
-    * @param cl a class
-    */
-   public static void printFields(Class cl)
-   {
-      Field[] fields = cl.getDeclaredFields();
-
-      for (Field f : fields)
-      {
-         Class type = f.getType();
-         String name = f.getName();
-         System.out.print("   ");
-         String modifiers = Modifier.toString(f.getModifiers());
-         if (modifiers.length() > 0) System.out.print(modifiers + " ");         
-         System.out.println(type.getName() + " " + name + ";");
-      }
-   }
-}

corejava第11版/corejava/v1ch05/resources/ResourceTest.java

@@ -1,28 +0,0 @@
-package resources;
-
-import java.io.*;
-import java.net.*;
-import java.nio.charset.*;
-import javax.swing.*;
-
-/**
- * @version 1.5 2018-03-15
- * @author Cay Horstmann
- */
-public class ResourceTest
-{
-   public static void main(String[] args) throws IOException
-   {
-      Class cl = ResourceTest.class;
-      URL aboutURL = cl.getResource("about.gif");
-      var icon = new ImageIcon(aboutURL);
-
-      InputStream stream = cl.getResourceAsStream("data/about.txt");
-      var about = new String(stream.readAllBytes(), "UTF-8");
-
-      InputStream stream2 = cl.getResourceAsStream("/corejava/title.txt");      
-      var title = new String(stream2.readAllBytes(), StandardCharsets.UTF_8).trim();
-
-      JOptionPane.showMessageDialog(null, about, title, JOptionPane.INFORMATION_MESSAGE, icon);
-   }
-}

corejava第11版/corejava/v1ch05/resources/ResourceTest.mf

@@ -1 +0,0 @@
-Main-Class: resources.ResourceTest

corejava第11版/corejava/v1ch05/resources/data/about.txt

@@ -1,5 +0,0 @@
-Core Java: Fundamentals
-11th Edition
-Cay Horstmann
-Copyright © 2018
-Prentice-Hall

corejava第11版/corejava/v1ch06/META-INF/services/serviceLoader.Cipher

@@ -1 +0,0 @@
-serviceLoader.impl.CaesarCipher

corejava第11版/corejava/v1ch06/anonymousInnerClass/AnonymousInnerClassTest.java

@@ -1,51 +0,0 @@
-package anonymousInnerClass;
-
-import java.awt.*;
-import java.awt.event.*;
-import java.time.*;
-
-import javax.swing.*;
-
-/**
- * This program demonstrates anonymous inner classes.
- * @version 1.12 2017-12-14
- * @author Cay Horstmann
- */
-public class AnonymousInnerClassTest
-{
-   public static void main(String[] args)
-   {
-      var clock = new TalkingClock();
-      clock.start(1000, true);
-
-      // keep program running until the user selects "OK"
-      JOptionPane.showMessageDialog(null, "Quit program?");
-      System.exit(0);
-   }
-}
-
-/**
- * A clock that prints the time in regular intervals.
- */
-class TalkingClock
-{
-   /**
-    * Starts the clock.
-    * @param interval the interval between messages (in milliseconds)
-    * @param beep true if the clock should beep
-    */
-   public void start(int interval, boolean beep)
-   {
-      var listener = new ActionListener()
-         {
-            public void actionPerformed(ActionEvent event)
-            {
-               System.out.println("At the tone, the time is " 
-                  + Instant.ofEpochMilli(event.getWhen()));
-               if (beep) Toolkit.getDefaultToolkit().beep();
-            }
-         };
-      var timer = new Timer(interval, listener);
-      timer.start();
-   }
-}

corejava第11版/corejava/v1ch06/clone/CloneTest.java

@@ -1,20 +0,0 @@
-package clone;
-
-/**
- * This program demonstrates cloning.
- * @version 1.11 2018-03-16
- * @author Cay Horstmann
- */
-public class CloneTest
-{
-   public static void main(String[] args) throws CloneNotSupportedException
-   {
-      var original = new Employee("John Q. Public", 50000);
-      original.setHireDay(2000, 1, 1);
-      Employee copy = original.clone();
-      copy.raiseSalary(10);
-      copy.setHireDay(2002, 12, 31);
-      System.out.println("original=" + original);
-      System.out.println("copy=" + copy);
-   }
-}

corejava第11版/corejava/v1ch06/clone/Employee.java

@@ -1,54 +0,0 @@
-package clone;
-
-import java.util.Date;
-import java.util.GregorianCalendar;
-
-public class Employee implements Cloneable
-{
-   private String name;
-   private double salary;
-   private Date hireDay;
-
-   public Employee(String name, double salary)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = new Date();
-   }
-
-   public Employee clone() throws CloneNotSupportedException
-   {
-      // call Object.clone()
-      Employee cloned = (Employee) super.clone();
-
-      // clone mutable fields
-      cloned.hireDay = (Date) hireDay.clone();
-
-      return cloned;
-   }
-
-   /**
-    * Set the hire day to a given date. 
-    * @param year the year of the hire day
-    * @param month the month of the hire day
-    * @param day the day of the hire day
-    */
-   public void setHireDay(int year, int month, int day)
-   {
-      Date newHireDay = new GregorianCalendar(year, month - 1, day).getTime();
-      
-      // example of instance field mutation
-      hireDay.setTime(newHireDay.getTime());
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-
-   public String toString()
-   {
-      return "Employee[name=" + name + ",salary=" + salary + ",hireDay=" + hireDay + "]";
-   }
-}

corejava第11版/corejava/v1ch06/innerClass/InnerClassTest.java

@@ -1,65 +0,0 @@
-package innerClass;
-
-import java.awt.*;
-import java.awt.event.*;
-import java.time.*;
-
-import javax.swing.*;
-
-/**
- * This program demonstrates the use of inner classes.
- * @version 1.11 2017-12-14
- * @author Cay Horstmann
- */
-public class InnerClassTest
-{
-   public static void main(String[] args)
-   {
-      var clock = new TalkingClock(1000, true);
-      clock.start();
-
-      // keep program running until the user selects "OK"
-      JOptionPane.showMessageDialog(null, "Quit program?");
-      System.exit(0);
-   }
-}
-
-/**
- * A clock that prints the time in regular intervals.
- */
-class TalkingClock
-{
-   private int interval;
-   private boolean beep;
-
-   /**
-    * Constructs a talking clock
-    * @param interval the interval between messages (in milliseconds)
-    * @param beep true if the clock should beep
-    */
-   public TalkingClock(int interval, boolean beep)
-   {
-      this.interval = interval;
-      this.beep = beep;
-   }
-
-   /**
-    * Starts the clock.
-    */
-   public void start()
-   {
-      var listener = new TimePrinter();
-      var timer = new Timer(interval, listener);
-      timer.start();
-   }
-
-   public class TimePrinter implements ActionListener
-   {
-      public void actionPerformed(ActionEvent event)
-      {
-         System.out.println("At the tone, the time is " 
-            + Instant.ofEpochMilli(event.getWhen()));
-         if (beep) Toolkit.getDefaultToolkit().beep();
-      }
-   }
-}

corejava第11版/corejava/v1ch06/interfaces/Employee.java

@@ -1,40 +0,0 @@
-package interfaces;
-
-public class Employee implements Comparable<Employee>
-{
-   private String name;
-   private double salary;
-
-   public Employee(String name, double salary)
-   {
-      this.name = name;
-      this.salary = salary;
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {
-      return salary;
-   }
-
-   public void raiseSalary(double byPercent)
-   {
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-
-   /**
-    * Compares employees by salary
-    * @param other another Employee object
-    * @return a negative value if this employee has a lower salary than
-    * otherObject, 0 if the salaries are the same, a positive value otherwise
-    */
-   public int compareTo(Employee other)
-   {
-      return Double.compare(salary, other.salary);
-   }
-}

corejava第11版/corejava/v1ch06/interfaces/EmployeeSortTest.java

@@ -1,26 +0,0 @@
-package interfaces;
-
-import java.util.*;
-
-/**
- * This program demonstrates the use of the Comparable interface.
- * @version 1.30 2004-02-27
- * @author Cay Horstmann
- */
-public class EmployeeSortTest
-{
-   public static void main(String[] args)
-   {
-      var staff = new Employee[3];
-
-      staff[0] = new Employee("Harry Hacker", 35000);
-      staff[1] = new Employee("Carl Cracker", 75000);
-      staff[2] = new Employee("Tony Tester", 38000);
-
-      Arrays.sort(staff);
-
-      // print out information about all Employee objects
-      for (Employee e : staff)
-         System.out.println("name=" + e.getName() + ",salary=" + e.getSalary());
-   }
-}

corejava第11版/corejava/v1ch06/lambda/LambdaTest.java

@@ -1,35 +0,0 @@
-package lambda;
-
-import java.util.*;
-
-import javax.swing.*;
-import javax.swing.Timer;
-
-/**
- * This program demonstrates the use of lambda expressions.
- * @version 1.0 2015-05-12
- * @author Cay Horstmann
- */
-public class LambdaTest
-{
-   public static void main(String[] args)
-   {
-      var planets = new String[] { "Mercury", "Venus", "Earth", "Mars", 
-         "Jupiter", "Saturn", "Uranus", "Neptune" };
-      System.out.println(Arrays.toString(planets));
-      System.out.println("Sorted in dictionary order:");
-      Arrays.sort(planets);
-      System.out.println(Arrays.toString(planets));
-      System.out.println("Sorted by length:");
-      Arrays.sort(planets, (first, second) -> first.length() - second.length());
-      System.out.println(Arrays.toString(planets));
-            
-      var timer = new Timer(1000, event ->
-         System.out.println("The time is " + new Date()));
-      timer.start();   
-         
-      // keep program running until user selects "OK"
-      JOptionPane.showMessageDialog(null, "Quit program?");
-      System.exit(0);         
-   }
-}

corejava第11版/corejava/v1ch06/localInnerClass/LocalInnerClassTest.java

@@ -1,52 +0,0 @@
-package localInnerClass;
-
-import java.awt.*;
-import java.awt.event.*;
-import java.time.*;
-
-import javax.swing.*;
-
-/**
- * This program demonstrates the use of local inner classes.
- * @version 1.02 2017-12-14
- * @author Cay Horstmann
- */
-public class LocalInnerClassTest
-{
-   public static void main(String[] args)
-   {
-      var clock = new TalkingClock();
-      clock.start(1000, true);
-
-      // keep program running until the user selects "Ok"
-      JOptionPane.showMessageDialog(null, "Quit program?");
-      System.exit(0);
-   }
-}
-
-/**
- * A clock that prints the time in regular intervals.
- */
-class TalkingClock
-{
-   /**
-    * Starts the clock.
-    * @param interval the interval between messages (in milliseconds)
-    * @param beep true if the clock should beep
-    */
-   public void start(int interval, boolean beep)
-   {
-      class TimePrinter implements ActionListener
-      {
-         public void actionPerformed(ActionEvent event)
-         {
-            System.out.println("At the tone, the time is " 
-                  + Instant.ofEpochMilli(event.getWhen()));
-            if (beep) Toolkit.getDefaultToolkit().beep();
-         }
-      }
-      var listener = new TimePrinter();
-      var timer = new Timer(interval, listener);
-      timer.start();
-   }
-}

corejava第11版/corejava/v1ch06/proxy/ProxyTest.java

@@ -1,76 +0,0 @@
-package proxy;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-/**
- * This program demonstrates the use of proxies.
- * @version 1.01 2018-04-10
- * @author Cay Horstmann
- */
-public class ProxyTest
-{
-   public static void main(String[] args)
-   {
-      var elements = new Object[1000];
-
-      // fill elements with proxies for the integers 1 . . . 1000
-      for (int i = 0; i < elements.length; i++)
-      {
-         Integer value = i + 1;
-         var handler = new TraceHandler(value);
-         Object proxy = Proxy.newProxyInstance(
-            ClassLoader.getSystemClassLoader(),
-            new Class[] { Comparable.class } , handler);
-         elements[i] = proxy;
-      }
-
-      // construct a random integer
-      Integer key = new Random().nextInt(elements.length) + 1;
-
-      // search for the key
-      int result = Arrays.binarySearch(elements, key);
-
-      // print match if found
-      if (result >= 0) System.out.println(elements[result]);
-   }
-}
-
-/**
- * An invocation handler that prints out the method name and parameters, then
- * invokes the original method
- */
-class TraceHandler implements InvocationHandler
-{
-   private Object target;
-
-   /**
-    * Constructs a TraceHandler
-    * @param t the implicit parameter of the method call
-    */
-   public TraceHandler(Object t)
-   {
-      target = t;
-   }
-
-   public Object invoke(Object proxy, Method m, Object[] args) throws Throwable
-   {
-      // print implicit argument
-      System.out.print(target);
-      // print method name
-      System.out.print("." + m.getName() + "(");
-      // print explicit arguments
-      if (args != null)
-      {
-         for (int i = 0; i < args.length; i++)
-         {
-            System.out.print(args[i]);
-            if (i < args.length - 1) System.out.print(", ");
-         }
-      }
-      System.out.println(")");
-
-      // invoke actual method
-      return m.invoke(target, args);
-   }
-}

corejava第11版/corejava/v1ch06/serviceLoader/Cipher.java

@@ -1,8 +0,0 @@
-package serviceLoader;
-
-public interface Cipher
-{
-   byte[] encrypt(byte[] source, byte[] key);
-   byte[] decrypt(byte[] source, byte[] key);
-   int strength();
-}

corejava第11版/corejava/v1ch06/serviceLoader/ServiceLoaderTest.java

@@ -1,33 +0,0 @@
-package serviceLoader;
-
-import java.io.*;
-import java.nio.charset.*;
-import java.util.*;
-
-/**
- * @version 1.01 2018-03-17
- * @author Cay Horstmann
- */
-
-public class ServiceLoaderTest
-{
-   public static ServiceLoader<Cipher> cipherLoader 
-      = ServiceLoader.load(Cipher.class);
-
-   public static void main(String[] args) throws UnsupportedEncodingException
-   {
-      Cipher cipher = getCipher(1);
-      var message = "Meet me at the toga party.";
-      byte[] bytes = cipher.encrypt(message.getBytes(), new byte[] { 3 });
-      var encrypted = new String(bytes, StandardCharsets.UTF_8);
-      System.out.println(encrypted);
-   }
-
-   public static Cipher getCipher(int minStrength)
-   {
-      for (Cipher cipher : cipherLoader)
-         // Implicitly calls iterator
-         if (cipher.strength() >= minStrength) return cipher;
-      return null;
-   }
-}

corejava第11版/corejava/v1ch06/serviceLoader/impl/CaesarCipher.java

@@ -1,24 +0,0 @@
-package serviceLoader.impl;
-
-import serviceLoader.Cipher;
-
-public class CaesarCipher implements Cipher
-{
-   public byte[] encrypt(byte[] source, byte[] key)
-   {
-      var result = new byte[source.length];
-      for (int i = 0; i < source.length; i++)
-         result[i] = (byte) (source[i] + key[0]);
-      return result;
-   }
-
-   public byte[] decrypt(byte[] source, byte[] key)
-   {
-      return encrypt(source, new byte[] { (byte) -key[0] });
-   }
-
-   public int strength()
-   {
-      return 1;
-   }
-}

corejava第11版/corejava/v1ch06/staticInnerClass/StaticInnerClassTest.java

@@ -1,78 +0,0 @@
-package staticInnerClass;
-
-/**
- * This program demonstrates the use of static inner classes.
- * @version 1.02 2015-05-12
- * @author Cay Horstmann
- */
-public class StaticInnerClassTest
-{
-   public static void main(String[] args)
-   {
-      var values = new double[20];
-      for (int i = 0; i < values.length; i++)
-         values[i] = 100 * Math.random();
-      ArrayAlg.Pair p = ArrayAlg.minmax(values);
-      System.out.println("min = " + p.getFirst());
-      System.out.println("max = " + p.getSecond());
-   }
-}
-
-class ArrayAlg
-{
-   /**
-    * A pair of floating-point numbers
-    */
-   public static class Pair
-   {
-      private double first;
-      private double second;
-
-      /**
-       * Constructs a pair from two floating-point numbers
-       * @param f the first number
-       * @param s the second number
-       */
-      public Pair(double f, double s)
-      {
-         first = f;
-         second = s;
-      }
-
-      /**
-       * Returns the first number of the pair
-       * @return the first number
-       */
-      public double getFirst()
-      {
-         return first;
-      }
-
-      /**
-       * Returns the second number of the pair
-       * @return the second number
-       */
-      public double getSecond()
-      {
-         return second;
-      }
-   }
-
-   /**
-    * Computes both the minimum and the maximum of an array
-    * @param values an array of floating-point numbers
-    * @return a pair whose first element is the minimum and whose second element
-    * is the maximum
-    */
-   public static Pair minmax(double[] values)
-   {
-      double min = Double.POSITIVE_INFINITY;
-      double max = Double.NEGATIVE_INFINITY;
-      for (double v : values)
-      {
-         if (min > v) min = v;
-         if (max < v) max = v;
-      }
-      return new Pair(min, max);
-   }
-}

corejava第11版/corejava/v1ch06/timer/TimerTest.java

@@ -1,38 +0,0 @@
-package timer;
-
-/**
-   @version 1.02 2017-12-14
-   @author Cay Horstmann
-*/
-
-import java.awt.*;
-import java.awt.event.*;
-import java.time.*;
-import javax.swing.*;
-
-public class TimerTest
-{  
-   public static void main(String[] args)
-   {  
-      var listener = new TimePrinter();
-
-      // construct a timer that calls the listener
-      // once every second
-      var timer = new Timer(1000, listener);
-      timer.start();
-
-      // keep program running until the user selects "OK"
-      JOptionPane.showMessageDialog(null, "Quit program?");
-      System.exit(0);
-   }
-}
-
-class TimePrinter implements ActionListener
-{  
-   public void actionPerformed(ActionEvent event)
-   {  
-      System.out.println("At the tone, the time is " 
-         + Instant.ofEpochMilli(event.getWhen()));
-      Toolkit.getDefaultToolkit().beep();
-   }
-}

corejava第11版/corejava/v1ch07/except/ExceptTest.java

@@ -1,57 +0,0 @@
-package except;
-
-import java.nio.charset.*;
-import java.nio.file.*;
-import java.util.*;
-import java.util.concurrent.*;
-
-/**
- * @version 1.40 2018-03-17
- * @author Cay Horstmann
- */
-public class ExceptTest
-{
-   public static void main(String[] args)
-   {
-      int thousand = 1000;
-      double[] a = { 1000, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
-      performAction("Integer divide by zero", () -> 1 / (a.length - a.length));
-
-      performAction("Floating point divide by zero",
-            () -> a[2] / (a[3] - a[3]));
-
-      performAction("Integer overflow",
-            () -> thousand * thousand * thousand * thousand);
-
-      performAction("Square root of negative number", () -> Math.sqrt(-1));
-
-      performAction("Array index out of bounds", () -> a[1] - a[100]);
-
-      performAction("Bad cast", () -> (int[]) (Object) a);
-
-      performAction("Null pointer",
-            () -> System.getProperty("woozle").toString());
-
-      performAction("No such file",
-            () -> new Scanner(Paths.get("woozle.txt"), StandardCharsets.UTF_8).next());
-   }
-
-   /**
-    * Performs the given action and reports the result or failure.
-    * @param description the description of the action
-    * @param action the action to be carried out
-    */
-   private static void performAction(String description,
-         Callable<Object> action)
-   {
-      System.out.println(description);
-      try
-      {
-         System.out.println(action.call());
-      }
-      catch (Throwable t)
-      {
-         System.out.println(t.getClass().getName() + ": " + t.getMessage());
-      }
-   }
-}

corejava第11版/corejava/v1ch07/exceptional/ExceptionalTest.java

@@ -1,41 +0,0 @@
-package exceptional;
-
-import java.util.*;
-
-/**
- * @version 1.12 2017-12-14
- * @author Cay Horstmann
- */
-public class ExceptionalTest
-{
-   public static void main(String[] args)
-   {
-      int i = 0;
-      int ntry = 10000000;
-      var stack = new Stack<String>();
-
-      // test a stack for emptiness ntry times
-      System.out.println("Testing for empty stack");
-      long start = System.currentTimeMillis();
-      for (i = 0; i <= ntry; i++)
-         if (!stack.empty()) stack.pop();
-      long end = System.currentTimeMillis();
-      System.out.println((end - start) + " milliseconds");
-
-      // pop an empty stack ntry times and catch the resulting exception
-      System.out.println("Catching EmptyStackException");
-      start = System.currentTimeMillis();
-      for (i = 0; i <= ntry; i++)
-      {
-         try
-         {
-            stack.pop();
-         }
-         catch (EmptyStackException e)
-         {
-         }
-      }
-      end = System.currentTimeMillis();
-      System.out.println((end - start) + " milliseconds");
-   }
-}

corejava第11版/corejava/v1ch07/logging/LoggingImageViewer.java

@@ -1,170 +0,0 @@
-package logging;
-
-import java.awt.*;
-import java.awt.event.*;
-import java.io.*;
-import java.util.logging.*;
-import javax.swing.*;
-
-/**
- * A modification of the image viewer program that logs various events.
- * @version 1.03 2015-08-20
- * @author Cay Horstmann
- */
-public class LoggingImageViewer
-{
-   public static void main(String[] args)
-   {
-      if (System.getProperty("java.util.logging.config.class") == null
-            && System.getProperty("java.util.logging.config.file") == null)
-      {
-         try
-         {
-            Logger.getLogger("com.horstmann.corejava").setLevel(Level.ALL);
-            final int LOG_ROTATION_COUNT = 10;
-            var handler = new FileHandler("%h/LoggingImageViewer.log", 0, LOG_ROTATION_COUNT);
-            Logger.getLogger("com.horstmann.corejava").addHandler(handler);
-         }
-         catch (IOException e)
-         {
-            Logger.getLogger("com.horstmann.corejava").log(Level.SEVERE,
-               "Can't create log file handler", e);
-         }
-      }
-
-      EventQueue.invokeLater(() ->
-            {
-               var windowHandler = new WindowHandler();
-               windowHandler.setLevel(Level.ALL);
-               Logger.getLogger("com.horstmann.corejava").addHandler(windowHandler);
-
-               var frame = new ImageViewerFrame();
-               frame.setTitle("LoggingImageViewer");
-               frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-
-               Logger.getLogger("com.horstmann.corejava").fine("Showing frame");
-               frame.setVisible(true);
-            });
-   }
-}
-
-/**
- * The frame that shows the image.
- */
-class ImageViewerFrame extends JFrame
-{
-   private static final int DEFAULT_WIDTH = 300;
-   private static final int DEFAULT_HEIGHT = 400;   
-
-   private JLabel label;
-   private static Logger logger = Logger.getLogger("com.horstmann.corejava");
-
-   public ImageViewerFrame()
-   {
-      logger.entering("ImageViewerFrame", "<init>");      
-      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
-
-      // set up menu bar
-      var menuBar = new JMenuBar();
-      setJMenuBar(menuBar);
-
-      var menu = new JMenu("File");
-      menuBar.add(menu);
-
-      var openItem = new JMenuItem("Open");
-      menu.add(openItem);
-      openItem.addActionListener(new FileOpenListener());
-
-      var exitItem = new JMenuItem("Exit");
-      menu.add(exitItem);
-      exitItem.addActionListener(new ActionListener()
-         {
-            public void actionPerformed(ActionEvent event)
-            {
-               logger.fine("Exiting.");
-               System.exit(0);
-            }
-         });
-
-      // use a label to display the images
-      label = new JLabel();
-      add(label);
-      logger.exiting("ImageViewerFrame", "<init>");
-   }
-
-   private class FileOpenListener implements ActionListener
-   {
-      public void actionPerformed(ActionEvent event)
-      {
-         logger.entering("ImageViewerFrame.FileOpenListener", "actionPerformed", event);
-
-         // set up file chooser
-         var chooser = new JFileChooser();
-         chooser.setCurrentDirectory(new File("."));
-
-         // accept all files ending with .gif
-         chooser.setFileFilter(new javax.swing.filechooser.FileFilter()
-            {
-               public boolean accept(File f)
-               {
-                  return f.getName().toLowerCase().endsWith(".gif") || f.isDirectory();
-               }
-
-               public String getDescription()
-               {
-                  return "GIF Images";
-               }
-            });
-
-         // show file chooser dialog
-         int r = chooser.showOpenDialog(ImageViewerFrame.this);
-
-         // if image file accepted, set it as icon of the label
-         if (r == JFileChooser.APPROVE_OPTION)
-         {
-            String name = chooser.getSelectedFile().getPath();
-            logger.log(Level.FINE, "Reading file {0}", name);
-            label.setIcon(new ImageIcon(name));
-         }
-         else logger.fine("File open dialog canceled.");
-         logger.exiting("ImageViewerFrame.FileOpenListener", "actionPerformed");
-      }
-   }
-}
-
-/**
- * A handler for displaying log records in a window.
- */
-class WindowHandler extends StreamHandler
-{
-   private JFrame frame;
-
-   public WindowHandler()
-   {
-      frame = new JFrame();
-      var output = new JTextArea();
-      output.setEditable(false);
-      frame.setSize(200, 200);
-      frame.add(new JScrollPane(output));
-      frame.setFocusableWindowState(false);
-      frame.setVisible(true);
-      setOutputStream(new OutputStream()
-         {
-            public void write(int b)
-            {
-            } // not called
-
-            public void write(byte[] b, int off, int len)
-            {
-               output.append(new String(b, off, len));
-            }
-         });
-   }
-
-   public void publish(LogRecord record)
-   {
-      if (!frame.isVisible()) return;
-      super.publish(record);
-      flush();
-   }
-}

corejava第11版/corejava/v1ch07/loggingfx/LoggingImageViewer.java

@@ -1,135 +0,0 @@
-package loggingfx;
-
-import java.io.*;
-import java.nio.file.*;
-import java.util.logging.*;
-
-import javafx.application.*;
-import javafx.scene.*;
-import javafx.scene.control.*;
-import javafx.scene.control.Alert.*;
-import javafx.scene.image.*;
-import javafx.scene.layout.*;
-import javafx.stage.*;
-import javafx.stage.FileChooser.*;
-
-/**
- * A modification of the image viewer program that logs various events.
- * @version 1.10 2017-12-14
- * @author Cay Horstmann
- */
-public class LoggingImageViewer extends Application
-{
-   private static final int MIN_SIZE = 400;
-   private Logger logger = Logger.getLogger("com.horstmann.corejava");
-
-   public void start(Stage stage) throws IOException
-   {
-      if (System.getProperty("java.util.logging.config.class") == null
-            && System.getProperty("java.util.logging.config.file") == null)
-      {
-         try
-         {
-            logger.setLevel(Level.ALL);
-            final int LOG_ROTATION_COUNT = 10;
-            Handler handler = new FileHandler("%h/LoggingImageViewer.log", 0,
-                  LOG_ROTATION_COUNT);
-            logger.addHandler(handler);
-            handler.setLevel(Level.ALL);
-         }
-         catch (IOException e)
-         {
-            logger.log(Level.SEVERE, "Can't create log file handler", e);
-         }
-      }
-
-      BorderPane pane = new BorderPane();
-      MenuBar bar = new MenuBar();
-      pane.setTop(bar);
-      Menu fileMenu = new Menu("File");
-      bar.getMenus().add(fileMenu);
-      MenuItem openItem = new MenuItem("Open");
-      openItem.setOnAction(event -> load(stage, pane));
-      MenuItem exitItem = new MenuItem("Exit");
-      exitItem.setOnAction(event -> Platform.exit());
-      fileMenu.getItems().addAll(openItem, exitItem);
-      stage.setScene(new Scene(pane, MIN_SIZE, MIN_SIZE));
-      stage.setTitle("ImageViewer");
-
-      logger.addHandler(new WindowHandler(stage, Level.ALL));
-      logger.fine("Showing stage");
-      stage.show();
-   }
-
-   /**
-    * Loads an image.
-    * @param stage the stage above which to place the file chooser
-    * @param pane the pane into which to place the image view
-    */
-   public void load(Stage stage, BorderPane pane)
-   {
-      logger.entering("LoggingImageViewerFrame", "load",
-            new Object[] { stage, pane });
-      FileChooser fileChooser = new FileChooser();
-      fileChooser.getExtensionFilters().addAll(
-            new ExtensionFilter("Image Files", "*.png", "*.jpg", "*.gif"),
-            new ExtensionFilter("All Files", "*.*"));
-      File file = fileChooser.showOpenDialog(stage);
-      logger.fine("Selected file: " + file);
-      if (file != null)
-      {
-         try
-         {
-            Path path = file.toPath();
-            Image image = new Image(Files.newInputStream(path));
-            pane.setCenter(new ImageView(image));
-         }
-         catch (IOException e)
-         {
-            logger.log(Level.FINE, "File not found", e);
-            Alert alert = new Alert(AlertType.ERROR,
-               "Cannot open file.");
-            alert.showAndWait();
-         }
-      }
-      logger.exiting("LoggingImageViewerFrame", "load");
-   }
-}
-
-/**
- * A handler for displaying log records in a window.
- */
-class WindowHandler extends StreamHandler
-{
-   public WindowHandler(Stage parent, Level level)
-   {
-      setLevel(level);
-      TextArea output = new TextArea();
-      output.setEditable(false);
-      Stage stage = new Stage();
-      stage.setScene(new Scene(output, 400, 200));
-      stage.setTitle("Log messages");
-      stage.setX(100);
-      stage.setY(100);
-
-      stage.show();
-      setOutputStream(new OutputStream()
-      {
-         public void write(int b)
-         {
-            // not called
-         }
-
-         public void write(byte[] b, int off, int len)
-         {
-            output.appendText(new String(b, off, len));
-         }
-      });
-   }
-
-   public void publish(LogRecord record)
-   {
-      super.publish(record);
-      flush();
-   }
-}

corejava第11版/corejava/v1ch07/stackTrace/StackTraceTest.java

@@ -1,38 +0,0 @@
-package stackTrace;
-
-import java.util.*;
-
-/**
- * A program that displays a trace feature of a recursive method call.
- * @version 1.10 2017-12-14
- * @author Cay Horstmann
- */
-public class StackTraceTest
-{
-   /**
-    * Computes the factorial of a number
-    * @param n a non-negative integer
-    * @return n! = 1 * 2 * . . . * n
-    */
-   public static int factorial(int n)
-   {
-      System.out.println("factorial(" + n + "):");
-      var walker = StackWalker.getInstance();
-      walker.forEach(System.out::println);      
-      int r;
-      if (n <= 1) r = 1;
-      else r = n * factorial(n - 1);
-      System.out.println("return " + r);
-      return r;
-   }
-
-   public static void main(String[] args)
-   {
-      try (var in = new Scanner(System.in))
-      {
-         System.out.print("Enter n: ");
-         int n = in.nextInt();
-         factorial(n);
-      }
-   }
-}

corejava第11版/corejava/v1ch08/genericAlgorithms/GenericAlgorithms.java

@@ -1,57 +0,0 @@
-package genericAlgorithms;
-
-import java.lang.reflect.*;
-import java.util.*;
-import java.util.function.*;
-
-/**
- * @version 1.00 2015-05-21
- * @author Cay Horstmann
- */
-public class GenericAlgorithms
-{
-   public static void main(String[] args)
-   {
-      Pair<String> p = Pair.makePair(String::new);
-      System.out.println(p);
-      
-      p = Pair.makePair(String.class);
-      System.out.println(p);      
-      
-      String[] ss = ArrayAlg.minmax("Tom", "Dick", "Harry");
-      System.out.println(Arrays.toString(ss));
-      
-      ss = ArrayAlg.minmax(String[]::new, "Tom", "Dick", "Harry");
-      System.out.println(Arrays.toString(ss));      
-   }
-}
-
-class ArrayAlg
-{
-   public static <T extends Comparable> T[] minmax(IntFunction<T[]> constr, T... a)
-   {
-      T[] mm = constr.apply(2);
-      T min = a[0];
-      T max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.compareTo(a[i]) > 0) min = a[i];
-         if (max.compareTo(a[i]) < 0) max = a[i];
-      }
-      return mm;
-   }
-   
-   public static <T extends Comparable> T[] minmax(T... a)
-   {
-      T[] mm = (T[]) Array.newInstance(a.getClass().getComponentType(), 2);
-      T min = a[0];
-      T max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.compareTo(a[i]) > 0) min = a[i];
-         if (max.compareTo(a[i]) < 0) max = a[i];
-      }
-      return (T[]) mm; // compiles with warning
-   }      
-}
-

corejava第11版/corejava/v1ch08/genericAlgorithms/Pair.java

@@ -1,38 +0,0 @@
-package genericAlgorithms;
-
-import java.util.function.Supplier;
-
-/**
- * @version 1.00 2004-05-10
- * @author Cay Horstmann
- */
-public class Pair<T> 
-{
-   private T first;
-   private T second;
-
-   public Pair() { first = null; second = null; }
-   public Pair(T first, T second) { this.first = first;  this.second = second; }
-
-   public T getFirst() { return first; }
-   public T getSecond() { return second; }
-
-   public void setFirst(T newValue) { first = newValue; }
-   public void setSecond(T newValue) { second = newValue; }
-   
-   public String toString() { return "(" + first + ", " + second + ")"; }
-   
-   public static <T> Pair<T> makePair(Supplier<T> constr)
-   {
-      return new Pair<>(constr.get(), constr.get());
-   }
-   
-   public static <T> Pair<T> makePair(Class<T> cl)
-   {
-      try { 
-         return new Pair<>(cl.getConstructor().newInstance(), 
-            cl.getConstructor().newInstance()); 
-      }
-      catch (Exception e) { return null; }
-   }        
-}

corejava第11版/corejava/v1ch08/genericReflection/GenericReflectionTest.java

@@ -1,124 +0,0 @@
-package genericReflection;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-/**
- * @version 1.11 2018-04-10
- * @author Cay Horstmann
- */
-public class GenericReflectionTest
-{
-   public static void main(String[] args)
-   {
-      // read class name from command line args or user input
-      String name;
-      if (args.length > 0) name = args[0];
-      else
-      {
-         try (var in = new Scanner(System.in))
-         {
-            System.out.println("Enter class name (e.g., java.util.Collections): ");
-            name = in.next();
-         }
-      }
-
-      try
-      {
-         // print generic info for class and public methods
-         Class<?> cl = Class.forName(name);
-         printClass(cl);
-         for (Method m : cl.getDeclaredMethods())
-            printMethod(m);
-      }
-      catch (ClassNotFoundException e)
-      {
-         e.printStackTrace();
-      }
-   }
-
-   public static void printClass(Class<?> cl)
-   {
-      System.out.print(cl);
-      printTypes(cl.getTypeParameters(), "<", ", ", ">", true);
-      Type sc = cl.getGenericSuperclass();
-      if (sc != null)
-      {
-         System.out.print(" extends ");
-         printType(sc, false);
-      }
-      printTypes(cl.getGenericInterfaces(), " implements ", ", ", "", false);
-      System.out.println();
-   }
-
-   public static void printMethod(Method m)
-   {
-      String name = m.getName();
-      System.out.print(Modifier.toString(m.getModifiers()));
-      System.out.print(" ");
-      printTypes(m.getTypeParameters(), "<", ", ", "> ", true);
-
-      printType(m.getGenericReturnType(), false);
-      System.out.print(" ");
-      System.out.print(name);
-      System.out.print("(");
-      printTypes(m.getGenericParameterTypes(), "", ", ", "", false);
-      System.out.println(")");
-   }
-
-   public static void printTypes(Type[] types, String pre, String sep, String suf, 
-         boolean isDefinition)
-   {
-      if (pre.equals(" extends ") && Arrays.equals(types, new Type[] { Object.class }))
-         return;
-      if (types.length > 0) System.out.print(pre);
-      for (int i = 0; i < types.length; i++)
-      {
-         if (i > 0) System.out.print(sep);
-         printType(types[i], isDefinition);
-      }
-      if (types.length > 0) System.out.print(suf);
-   }
-
-   public static void printType(Type type, boolean isDefinition)
-   {
-      if (type instanceof Class)
-      {
-         var t = (Class<?>) type;
-         System.out.print(t.getName());
-      }
-      else if (type instanceof TypeVariable)
-      {
-         var t = (TypeVariable<?>) type;
-         System.out.print(t.getName());
-         if (isDefinition)
-            printTypes(t.getBounds(), " extends ", " & ", "", false);
-      }
-      else if (type instanceof WildcardType)
-      {
-         var t = (WildcardType) type;
-         System.out.print("?");
-         printTypes(t.getUpperBounds(), " extends ", " & ", "", false);
-         printTypes(t.getLowerBounds(), " super ", " & ", "", false);
-      }
-      else if (type instanceof ParameterizedType)
-      {
-         var t = (ParameterizedType) type;
-         Type owner = t.getOwnerType();
-         if (owner != null)
-         {
-            printType(owner, false);
-            System.out.print(".");
-         }
-         printType(t.getRawType(), false);
-         printTypes(t.getActualTypeArguments(), "<", ", ", ">", false);
-      }
-      else if (type instanceof GenericArrayType)
-      {
-         var t = (GenericArrayType) type;
-         System.out.print("");
-         printType(t.getGenericComponentType(), isDefinition);
-         System.out.print("[]");
-      }
-   }
-}

corejava第11版/corejava/v1ch08/genericReflection/TypeLiterals.java

@@ -1,154 +0,0 @@
-package genericReflection;
-
-/**
-   @version 1.01 2018-04-10
-   @author Cay Horstmann
-*/
-
-import java.lang.reflect.*;
-import java.util.*;
-import java.util.function.*;
-
-/**
- * A type literal describes a type that can be generic, such as 
- * ArrayList<String>. 
- */
-class TypeLiteral<T>
-{
-   private Type type;
-
-   /**
-    * This constructor must be invoked from an anonymous subclass
-    * as new TypeLiteral<. . .>(){}.
-    */
-   public TypeLiteral()
-   {
-      Type parentType = getClass().getGenericSuperclass();
-      if (parentType instanceof ParameterizedType) 
-      {
-         type = ((ParameterizedType) parentType).getActualTypeArguments()[0];
-      }
-      else
-         throw new UnsupportedOperationException(
-            "Construct as new TypeLiteral&lt;. . .&gt;(){}");            
-   }
-   
-   private TypeLiteral(Type type)
-   {
-      this.type = type;
-   }
-   
-   /**
-    * Yields a type literal that describes the given type. 
-    */
-   public static TypeLiteral<?> of(Type type)
-   {
-      return new TypeLiteral<Object>(type);
-   }
-
-   public String toString()
-   {
-      if (type instanceof Class) return ((Class<?>) type).getName();
-      else return type.toString();
-   }
-
-   public boolean equals(Object otherObject) 
-   {
-      return otherObject instanceof TypeLiteral
-         && type.equals(((TypeLiteral<?>) otherObject).type);      
-   }
-
-   public int hashCode()
-   {
-      return type.hashCode();
-   }
-}
-
-/**
- * Formats objects, using rules that associate types with formatting functions.
- */
-class Formatter
-{   
-   private Map<TypeLiteral<?>, Function<?, String>> rules = new HashMap<>();
-
-   /**
-    * Add a formatting rule to this formatter.
-    * @param type the type to which this rule applies
-    * @param formatterForType the function that formats objects of this type
-    */
-   public <T> void forType(TypeLiteral<T> type, Function<T, String> formatterForType) 
-   {
-      rules.put(type,  formatterForType);
-   }
-
-   /**
-    * Formats all fields of an object using the rules of this formatter.
-    * @param obj an object
-    * @return a string with all field names and formatted values
-    */
-   public String formatFields(Object obj) 
-         throws IllegalArgumentException, IllegalAccessException
-   {
-      var result = new StringBuilder();
-      for (Field f : obj.getClass().getDeclaredFields())
-      {
-         result.append(f.getName());
-         result.append("=");
-         f.setAccessible(true);
-         Function<?, String> formatterForType = rules.get(TypeLiteral.of(f.getGenericType()));
-         if (formatterForType != null) 
-         {
-            // formatterForType has parameter type ?. Nothing can be passed to its apply
-            // method. Cast makes the parameter type to Object so we can invoke it.
-            @SuppressWarnings("unchecked")
-            Function<Object, String> objectFormatter 
-               = (Function<Object, String>) formatterForType;
-            result.append(objectFormatter.apply(f.get(obj)));
-         }
-         else
-            result.append(f.get(obj).toString());
-         result.append("\n");
-      }
-      return result.toString();
-   }
-}
-
-public class TypeLiterals
-{
-   public static class Sample
-   {
-      ArrayList<Integer> nums;
-      ArrayList<Character> chars;
-      ArrayList<String> strings;
-      public Sample()       
-      { 
-         nums = new ArrayList<>();
-         nums.add(42); nums.add(1729);
-         chars = new ArrayList<>();
-         chars.add('H'); chars.add('i');
-         strings = new ArrayList<>();
-         strings.add("Hello"); strings.add("World");
-      }
-   }
-   
-   private static <T> String join(String separator, ArrayList<T> elements)
-   {
-      var result = new StringBuilder();
-      for (T e : elements)
-      {
-         if (result.length() > 0) result.append(separator);
-         result.append(e.toString());
-      }
-      return result.toString();
-   }
-   
-   public static void main(String[] args) throws Exception
-   {
-      var formatter = new Formatter();
-      formatter.forType(new TypeLiteral<ArrayList<Integer>>(){}, 
-         lst -> join(" ", lst));
-      formatter.forType(new TypeLiteral<ArrayList<Character>>(){}, 
-         lst -> "\"" + join("", lst) + "\"");
-      System.out.println(formatter.formatFields(new Sample()));
-   }
-}

corejava第11版/corejava/v1ch08/limitations/DefeatCheckedExceptionChecking.java

@@ -1,41 +0,0 @@
-package limitations;
-
-interface Task
-{
-   void run() throws Exception;
-   
-   @SuppressWarnings("unchecked")
-   static <T extends Throwable> void throwAs(Throwable t) throws T 
-   {
-      throw (T) t;
-   }
-   
-   static Runnable asRunnable(Task task) 
-   {
-      return () -> 
-      { 
-         try 
-         {
-            task.run();
-         } 
-         catch (Exception e) 
-         {
-            Task.<RuntimeException>throwAs(e);
-         }
-      };
-   }
-}
-
-public class DefeatCheckedExceptionChecking
-{
-   public static void main(String[] args)
-   {
-      var thread = new Thread(Task.asRunnable(() -> 
-         {
-            Thread.sleep(1000);
-            System.out.println("Hello, World!");
-            throw new Exception("Check this out!");
-         }));
-      thread.start();
-   }
-}

corejava第11版/corejava/v1ch08/limitations/NoGenericArray.java

@@ -1,27 +0,0 @@
-package limitations;
-
-import java.util.*;
-
-public class NoGenericArray
-{
-   public static <T extends Comparable> T[] minmax(T... a)
-   {
-      var mm = new Comparable[2];
-      T min = a[0];
-      T max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.compareTo(a[i]) > 0) min = a[i];
-         if (max.compareTo(a[i]) < 0) max = a[i];
-      }
-      mm[0] = min;
-      mm[1] = max;
-      return (T[]) mm; // compiles with warning
-   }
-   
-   public static void main(String[] args)
-   {
-      String[] fl = minmax("Tom", "Dick", "Harry");
-      System.out.println(Arrays.toString(fl));
-   }
-}

corejava第11版/corejava/v1ch08/pair1/Pair.java

@@ -1,20 +0,0 @@
-package pair1;
-
-/**
- * @version 1.00 2004-05-10
- * @author Cay Horstmann
- */
-public class Pair<T> 
-{
-   private T first;
-   private T second;
-
-   public Pair() { first = null; second = null; }
-   public Pair(T first, T second) { this.first = first;  this.second = second; }
-
-   public T getFirst() { return first; }
-   public T getSecond() { return second; }
-
-   public void setFirst(T newValue) { first = newValue; }
-   public void setSecond(T newValue) { second = newValue; }
-}

corejava第11版/corejava/v1ch08/pair1/PairTest1.java

@@ -1,37 +0,0 @@
-package pair1;
-
-/**
- * @version 1.01 2012-01-26
- * @author Cay Horstmann
- */
-public class PairTest1
-{
-   public static void main(String[] args)
-   {
-      String[] words = { "Mary", "had", "a", "little", "lamb" };
-      Pair<String> mm = ArrayAlg.minmax(words);
-      System.out.println("min = " + mm.getFirst());
-      System.out.println("max = " + mm.getSecond());
-   }
-}
-
-class ArrayAlg
-{
-   /**
-    * Gets the minimum and maximum of an array of strings.
-    * @param a an array of strings
-    * @return a pair with the min and max values, or null if a is null or empty
-    */
-   public static Pair<String> minmax(String[] a)
-   {
-      if (a == null || a.length == 0) return null;
-      String min = a[0];
-      String max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.compareTo(a[i]) > 0) min = a[i];
-         if (max.compareTo(a[i]) < 0) max = a[i];
-      }
-      return new Pair<>(min, max);
-   }
-}

corejava第11版/corejava/v1ch08/pair2/Pair.java

@@ -1,20 +0,0 @@
-package pair2;
-
-/**
- * @version 1.00 2004-05-10
- * @author Cay Horstmann
- */
-public class Pair<T> 
-{
-   private T first;
-   private T second;
-
-   public Pair() { first = null; second = null; }
-   public Pair(T first, T second) { this.first = first;  this.second = second; }
-
-   public T getFirst() { return first; }
-   public T getSecond() { return second; }
-
-   public void setFirst(T newValue) { first = newValue; }
-   public void setSecond(T newValue) { second = newValue; }
-}

corejava第11版/corejava/v1ch08/pair2/PairTest2.java

@@ -1,45 +0,0 @@
-package pair2;
-
-import java.time.*;
-
-/**
- * @version 1.02 2015-06-21
- * @author Cay Horstmann
- */
-public class PairTest2
-{
-   public static void main(String[] args)
-   {
-      LocalDate[] birthdays = 
-         { 
-            LocalDate.of(1906, 12, 9), // G. Hopper
-            LocalDate.of(1815, 12, 10), // A. Lovelace
-            LocalDate.of(1903, 12, 3), // J. von Neumann
-            LocalDate.of(1910, 6, 22), // K. Zuse
-         };
-      Pair<LocalDate> mm = ArrayAlg.minmax(birthdays);
-      System.out.println("min = " + mm.getFirst());
-      System.out.println("max = " + mm.getSecond());
-   }
-}
-
-class ArrayAlg
-{
-   /**
-      Gets the minimum and maximum of an array of objects of type T.
-      @param a an array of objects of type T
-      @return a pair with the min and max values, or null if a is null or empty
-   */
-   public static <T extends Comparable> Pair<T> minmax(T[] a) 
-   {
-      if (a == null || a.length == 0) return null;
-      T min = a[0];
-      T max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.compareTo(a[i]) > 0) min = a[i];
-         if (max.compareTo(a[i]) < 0) max = a[i];
-      }
-      return new Pair<>(min, max);
-   }
-}

corejava第11版/corejava/v1ch08/pair3/Employee.java

@@ -1,39 +0,0 @@
-package pair3;
-
-import java.time.*;
-
-public class Employee
-{  
-   private String name;
-   private double salary;
-   private LocalDate hireDay;
-
-   public Employee(String name, double salary, int year, int month, int day)
-   {
-      this.name = name;
-      this.salary = salary;
-      hireDay = LocalDate.of(year, month, day);
-   }
-
-   public String getName()
-   {
-      return name;
-   }
-
-   public double getSalary()
-   {  
-      return salary;
-   }
-
-   public LocalDate getHireDay()
-   {  
-      return hireDay;
-   }
-
-   public void raiseSalary(double byPercent)
-   {  
-      double raise = salary * byPercent / 100;
-      salary += raise;
-   }
-}
-

corejava第11版/corejava/v1ch08/pair3/Manager.java

@@ -1,35 +0,0 @@
-package pair3;
-
-public class Manager extends Employee
-{  
-   private double bonus;
-
-   /**
-      @param name the employee's name
-      @param salary the salary
-      @param year the hire year
-      @param month the hire month
-      @param day the hire day
-   */
-   public Manager(String name, double salary, int year, int month, int day)
-   {  
-      super(name, salary, year, month, day);
-      bonus = 0;
-   }
-
-   public double getSalary()
-   { 
-      double baseSalary = super.getSalary();
-      return baseSalary + bonus;
-   }
-
-   public void setBonus(double b)
-   {  
-      bonus = b;
-   }
-
-   public double getBonus()
-   {  
-      return bonus;
-   }
-}

corejava第11版/corejava/v1ch08/pair3/Pair.java

@@ -1,20 +0,0 @@
-package pair3;
-
-/**
- * @version 1.00 2004-05-10
- * @author Cay Horstmann
- */
-public class Pair<T> 
-{
-   private T first;
-   private T second;
-
-   public Pair() { first = null; second = null; }
-   public Pair(T first, T second) { this.first = first;  this.second = second; }
-
-   public T getFirst() { return first; }
-   public T getSecond() { return second; }
-
-   public void setFirst(T newValue) { first = newValue; }
-   public void setSecond(T newValue) { second = newValue; }
-}

corejava第11版/corejava/v1ch08/pair3/PairTest3.java

@@ -1,73 +0,0 @@
-package pair3;
-
-/**
- * @version 1.01 2012-01-26
- * @author Cay Horstmann
- */
-public class PairTest3
-{
-   public static void main(String[] args)
-   {
-      var ceo = new Manager("Gus Greedy", 800000, 2003, 12, 15);
-      var cfo = new Manager("Sid Sneaky", 600000, 2003, 12, 15);
-      var buddies = new Pair<Manager>(ceo, cfo);      
-      printBuddies(buddies);
-
-      ceo.setBonus(1000000);
-      cfo.setBonus(500000);
-      Manager[] managers = { ceo, cfo };
-
-      var result = new Pair<Employee>();
-      minmaxBonus(managers, result);
-      System.out.println("first: " + result.getFirst().getName() 
-         + ", second: " + result.getSecond().getName());
-      maxminBonus(managers, result);
-      System.out.println("first: " + result.getFirst().getName() 
-         + ", second: " + result.getSecond().getName());
-   }
-
-   public static void printBuddies(Pair<? extends Employee> p)
-   {
-      Employee first = p.getFirst();
-      Employee second = p.getSecond();
-      System.out.println(first.getName() + " and " + second.getName() + " are buddies.");
-   }
-
-   public static void minmaxBonus(Manager[] a, Pair<? super Manager> result)
-   {
-      if (a.length == 0) return;
-      Manager min = a[0];
-      Manager max = a[0];
-      for (int i = 1; i < a.length; i++)
-      {
-         if (min.getBonus() > a[i].getBonus()) min = a[i];
-         if (max.getBonus() < a[i].getBonus()) max = a[i];
-      }
-      result.setFirst(min);
-      result.setSecond(max);
-   }
-
-   public static void maxminBonus(Manager[] a, Pair<? super Manager> result)
-   {
-      minmaxBonus(a, result);
-      PairAlg.swapHelper(result); // OK--swapHelper captures wildcard type
-   }
-   // can't write public static <T super manager> . . .
-}
-
-class PairAlg
-{
-   public static boolean hasNulls(Pair<?> p)
-   {
-      return p.getFirst() == null || p.getSecond() == null;
-   }
-
-   public static void swap(Pair<?> p) { swapHelper(p); }
-
-   public static <T> void swapHelper(Pair<T> p)
-   {
-      T t = p.getFirst();
-      p.setFirst(p.getSecond());
-      p.setSecond(t);
-   }
-}

corejava第11版/corejava/v1ch09/circularArrayQueue/CircularArrayQueueTest.java

@@ -1,123 +0,0 @@
-package circularArrayQueue;
-
-import java.util.*;
-
-/**
- * This program demonstrates how to extend the collections framework.
- * @version 1.22 2018-04-10
- * @author Cay Horstmann
- */
-public class CircularArrayQueueTest
-{
-   public static void main(String[] args)
-   {
-      var q = new CircularArrayQueue<String>(5);
-      q.add("Amy");
-      q.add("Bob");
-      q.add("Carl");
-      q.add("Deedee");
-      q.add("Emile");
-      q.remove();
-      q.add("Fifi");
-      q.remove();
-      for (String s : q) System.out.println(s);
-   }
-}
-
-/** 
-    A first-in, first-out bounded collection. 
-*/ 
-class CircularArrayQueue<E> extends AbstractQueue<E>
-{ 
-   private Object[] elements; 
-   private int head; 
-   private int tail; 
-   private int count; 
-   private int modcount;
-
-   /** 
-       Constructs an empty queue. 
-       @param capacity the maximum capacity of the queue 
-   */ 
-   public CircularArrayQueue(int capacity) 
-   { 
-      elements = new Object[capacity]; 
-      count = 0; 
-      head = 0; 
-      tail = 0; 
-   } 
-
-   public boolean offer(E newElement) 
-   { 
-      assert newElement != null;
-      if (count < elements.length) 
-      {
-         elements[tail] = newElement; 
-         tail = (tail + 1) % elements.length; 
-         count++;
-         modcount++;
-         return true;
-      }
-      else 
-         return false;
-   } 
-
-   public E poll() 
-   { 
-      if (count == 0) return null;
-      E r = peek(); 
-      head = (head + 1) % elements.length; 
-      count--; 
-      modcount++;
-      return r; 
-   } 
-
-   @SuppressWarnings("unchecked")
-   public E peek() 
-   { 
-      if (count == 0) return null;
-      return (E) elements[head]; 
-   } 
-
-   public int size() 
-   { 
-      return count; 
-   } 
-
-   public Iterator<E> iterator()
-   {
-      return new QueueIterator();         
-   }
-
-   private class QueueIterator implements Iterator<E>
-   {
-      private int offset;
-      private int modcountAtConstruction;
-
-      public QueueIterator()
-      {
-         modcountAtConstruction = modcount;
-      }
-
-      @SuppressWarnings("unchecked")
-      public E next() 
-      { 
-         if (!hasNext()) throw new NoSuchElementException();
-         var r = (E) elements[(head + offset) % elements.length]; 
-         offset++;
-         return r;
-      }
-
-      public boolean hasNext() 
-      { 
-         if (modcount != modcountAtConstruction) 
-            throw new ConcurrentModificationException();
-         return offset < count;
-      }
-
-      public void remove() 
-      { 
-         throw new UnsupportedOperationException(); 
-      }
-   }
-}

corejava第11版/corejava/v1ch09/linkedList/LinkedListTest.java

@@ -1,59 +0,0 @@
-package linkedList;
-
-import java.util.*;
-
-/**
- * This program demonstrates operations on linked lists.
- * @version 1.12 2018-04-10
- * @author Cay Horstmann
- */
-public class LinkedListTest
-{
-   public static void main(String[] args)
-   {
-      var a = new LinkedList<String>();
-      a.add("Amy");
-      a.add("Carl");
-      a.add("Erica");
-
-      var b = new LinkedList<String>();
-      b.add("Bob");
-      b.add("Doug");
-      b.add("Frances");
-      b.add("Gloria");
-
-      // merge the words from b into a
-
-      ListIterator<String> aIter = a.listIterator();
-      Iterator<String> bIter = b.iterator();
-
-      while (bIter.hasNext())
-      {
-         if (aIter.hasNext()) aIter.next();
-         aIter.add(bIter.next());
-      }
-
-      System.out.println(a);
-
-      // remove every second word from b
-
-      bIter = b.iterator();
-      while (bIter.hasNext())
-      {
-         bIter.next(); // skip one element
-         if (bIter.hasNext())
-         {
-            bIter.next(); // skip next element
-            bIter.remove(); // remove that element
-         }
-      }
-
-      System.out.println(b);
-
-      // bulk operation: remove all words in b from a
-
-      a.removeAll(b);
-
-      System.out.println(a);
-   }
-}

corejava第11版/corejava/v1ch09/map/Employee.java

@@ -1,25 +0,0 @@
-package map;
-
-/**
- * A minimalist employee class for testing purposes.
- */
-public class Employee
-{
-   private String name;
-   private double salary;
-
-   /**
-    * Constructs an employee with $0 salary.
-    * @param n the employee name
-    */
-   public Employee(String name)
-   {
-      this.name = name;
-      salary = 0;
-   }
-
-   public String toString()
-   {
-      return "[name=" + name + ", salary=" + salary + "]";
-   }
-}

corejava第11版/corejava/v1ch09/map/MapTest.java

@@ -1,41 +0,0 @@
-package map;
-
-import java.util.*;
-
-/**
- * This program demonstrates the use of a map with key type String and value type Employee.
- * @version 1.12 2015-06-21
- * @author Cay Horstmann
- */
-public class MapTest
-{
-   public static void main(String[] args)
-   {
-      var staff = new HashMap<String, Employee>();
-      staff.put("144-25-5464", new Employee("Amy Lee"));
-      staff.put("567-24-2546", new Employee("Harry Hacker"));
-      staff.put("157-62-7935", new Employee("Gary Cooper"));
-      staff.put("456-62-5527", new Employee("Francesca Cruz"));
-
-      // print all entries
-
-      System.out.println(staff);
-
-      // remove an entry
-
-      staff.remove("567-24-2546");
-
-      // replace an entry
-
-      staff.put("456-62-5527", new Employee("Francesca Miller"));
-
-      // look up a value
-
-      System.out.println(staff.get("157-62-7935"));
-
-      // iterate through all entries
-
-      staff.forEach((k, v) -> 
-         System.out.println("key=" + k + ", value=" + v));
-   }
-}

corejava第11版/corejava/v1ch09/priorityQueue/PriorityQueueTest.java

@@ -1,28 +0,0 @@
-package priorityQueue;
-
-import java.util.*;
-import java.time.*;
-
-/**
- * This program demonstrates the use of a priority queue.
- * @version 1.02 2015-06-20
- * @author Cay Horstmann
- */
-public class PriorityQueueTest
-{
-   public static void main(String[] args)
-   {
-      var pq = new PriorityQueue<LocalDate>();
-      pq.add(LocalDate.of(1906, 12, 9)); // G. Hopper
-      pq.add(LocalDate.of(1815, 12, 10)); // A. Lovelace
-      pq.add(LocalDate.of(1903, 12, 3)); // J. von Neumann
-      pq.add(LocalDate.of(1910, 6, 22)); // K. Zuse
-
-      System.out.println("Iterating over elements . . .");
-      for (LocalDate date : pq)
-         System.out.println(date);
-      System.out.println("Removing elements . . .");
-      while (!pq.isEmpty())
-         System.out.println(pq.remove());
-   }
-}

corejava第11版/corejava/v1ch09/properties/ImageViewer.java

@@ -1,132 +0,0 @@
-package properties;
-
-import java.awt.EventQueue;
-import java.awt.event.*;
-import java.io.*;
-import java.util.Properties;
-import javax.swing.*;
-
-/**
- * A program to test properties. The program remembers the frame position, size,
- * and last selected file.
- * @version 1.10 2018-03-15
- * @author Cay Horstmann
- */
-public class ImageViewer
-{
-   public static void main(String[] args)
-   {
-      EventQueue.invokeLater(() -> {
-         var frame = new ImageViewerFrame();
-         frame.setTitle("ImageViewer");
-         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-         frame.setVisible(true);
-      });
-   }
-}
-
-/**
- * An image viewer that restores position and size from a properties file
- * and updates the properties upon exit.
- */
-class ImageViewerFrame extends JFrame
-{
-   private static final int DEFAULT_WIDTH = 300;
-   private static final int DEFAULT_HEIGHT = 200;
-
-   private File propertiesFile;
-   private Properties settings;
-   private String image;
-   private JLabel label = new JLabel();
-
-   public ImageViewerFrame()
-   {
-      // get position, size, title from properties
-
-      String userDir = System.getProperty("user.home");
-      var propertiesDir = new File(userDir, ".corejava");
-      if (!propertiesDir.exists()) propertiesDir.mkdir();
-      propertiesFile = new File(propertiesDir, "ImageViewer.properties");
-
-      var defaultSettings = new Properties();
-      defaultSettings.setProperty("left", "0");
-      defaultSettings.setProperty("top", "0");
-      defaultSettings.setProperty("width", "" + DEFAULT_WIDTH);
-      defaultSettings.setProperty("height", "" + DEFAULT_HEIGHT);
-      defaultSettings.setProperty("title", "");
-
-      settings = new Properties(defaultSettings);
-
-      if (propertiesFile.exists()) 
-         try (var in = new FileInputStream(propertiesFile))
-         {         
-            settings.load(in);
-         }
-         catch (IOException ex)
-         {
-            ex.printStackTrace();
-         }
-
-      int left = Integer.parseInt(settings.getProperty("left"));
-      int top = Integer.parseInt(settings.getProperty("top"));
-      int width = Integer.parseInt(settings.getProperty("width"));
-      int height = Integer.parseInt(settings.getProperty("height"));
-      setBounds(left, top, width, height);
-      image = settings.getProperty("image");
-      if (image != null) label.setIcon(new ImageIcon(image));
-
-      addWindowListener(new WindowAdapter()
-      {
-         public void windowClosing(WindowEvent event)
-         {
-            settings.setProperty("left", "" + (int) getX());
-            settings.setProperty("top", "" + (int) getY());
-            settings.setProperty("width", "" + (int) getWidth());
-            settings.setProperty("height", "" + (int) getHeight());
-            if (image != null)
-               settings.setProperty("image", image);
-            try (var out = new FileOutputStream(propertiesFile))
-            {
-               settings.store(out, "Program Properties");
-            }
-            catch (IOException ex)
-            {
-               ex.printStackTrace();
-            }
-            System.exit(0);
-         }
-      });
-
-      // use a label to display the images
-      add(label);
-
-      // set up the file chooser
-      var chooser = new JFileChooser();
-      chooser.setCurrentDirectory(new File("."));
-
-      // set up the menu bar
-      var menuBar = new JMenuBar();
-      setJMenuBar(menuBar);
-
-      var menu = new JMenu("File");
-      menuBar.add(menu);
-
-      var openItem = new JMenuItem("Open");
-      menu.add(openItem);
-      openItem.addActionListener(event -> {
-         // show file chooser dialog
-            int result = chooser.showOpenDialog(null);
-
-            // if file selected, set it as icon of the label
-            if (result == JFileChooser.APPROVE_OPTION)
-            {
-               image = chooser.getSelectedFile().getPath();
-               label.setIcon(new ImageIcon(image));
-            }
-         });
-
-      var exitItem = new JMenuItem("Exit");
-      menu.add(exitItem);
-      exitItem.addActionListener(event -> System.exit(0));
-   }
-}

corejava第11版/corejava/v1ch09/set/SetTest.java

@@ -1,35 +0,0 @@
-package set;
-
-import java.util.*;
-
-/**
- * This program uses a set to print all unique words in System.in.
- * @version 1.12 2015-06-21
- * @author Cay Horstmann
- */
-public class SetTest
-{
-   public static void main(String[] args)
-   {
-      var words = new HashSet<String>(); 
-      long totalTime = 0;
-
-      try (var in = new Scanner(System.in))
-      {
-         while (in.hasNext())
-         {
-            String word = in.next();
-            long callTime = System.currentTimeMillis();
-            words.add(word);
-            callTime = System.currentTimeMillis() - callTime;
-            totalTime += callTime;
-         }
-      }
-
-      Iterator<String> iter = words.iterator();
-      for (int i = 1; i <= 20 && iter.hasNext(); i++)
-         System.out.println(iter.next());
-      System.out.println(". . .");
-      System.out.println(words.size() + " distinct words. " + totalTime + " milliseconds.");
-   }
-}

corejava第11版/corejava/v1ch09/shuffle/ShuffleTest.java

@@ -1,22 +0,0 @@
-package shuffle;
-
-import java.util.*;
-
-/**
- * This program demonstrates the random shuffle and sort algorithms.
- * @version 1.12 2018-04-10
- * @author Cay Horstmann
- */
-public class ShuffleTest
-{
-   public static void main(String[] args)
-   {
-      var numbers = new ArrayList<Integer>();
-      for (int i = 1; i <= 49; i++)
-         numbers.add(i);
-      Collections.shuffle(numbers);
-      List<Integer> winningCombination = numbers.subList(0, 6);
-      Collections.sort(winningCombination);
-      System.out.println(winningCombination);
-   }
-}

corejava第11版/corejava/v1ch09/sieve/Sieve.java

@@ -1,46 +0,0 @@
-package sieve;
-
-import java.util.*;
-
-/**
- * This program runs the Sieve of Erathostenes benchmark. It computes all primes 
- * up to 2,000,000.
- * @version 1.21 2004-08-03
- * @author Cay Horstmann
- */
-public class Sieve
-{
-   public static void main(String[] s)
-   {
-      int n = 2000000;
-      long start = System.currentTimeMillis();
-      var bitSet = new BitSet(n + 1);
-      int count = 0;
-      int i;
-      for (i = 2; i <= n; i++)
-         bitSet.set(i);
-      i = 2;
-      while (i * i <= n)
-      {
-         if (bitSet.get(i))
-         {
-            count++;
-            int k = 2 * i;
-            while (k <= n)
-            {
-               bitSet.clear(k);
-               k += i;
-            }
-         }
-         i++;
-      }
-      while (i <= n)
-      {
-         if (bitSet.get(i)) count++;
-         i++;
-      }
-      long end = System.currentTimeMillis();
-      System.out.println(count + " primes");
-      System.out.println((end - start) + " milliseconds");
-   }
-}

corejava第11版/corejava/v1ch09/sieve/sieve.cpp

@@ -1,50 +0,0 @@
-/**
-   @version 1.21 2004-08-03
-   @author Cay Horstmann
-*/
-
-#include <bitset>
-#include <iostream>
-#include <ctime>
-
-using namespace std;
-
-int main()
-{  
-   const int N = 2000000;
-   clock_t cstart = clock();
-
-   bitset<N + 1> b;
-   int count = 0;
-   int i;
-   for (i = 2; i <= N; i++)
-      b.set(i);
-   i = 2;
-   while (i * i <= N)
-   {  
-      if (b.test(i))
-      {  
-         count++;
-         int k = 2 * i;
-         while (k <= N)
-         {  
-            b.reset(k);
-            k += i;
-         }
-      }
-      i++;
-   }
-   while (i <= N)
-   {  
-      if (b.test(i))
-         count++;
-      i++;
-   }
-
-   clock_t cend = clock();
-   double millis = 1000.0 * (cend - cstart) / CLOCKS_PER_SEC;
-
-   cout << count << " primes\n" << millis << " milliseconds\n";
-
-   return 0;
-}