deyou
77 lines
1.5 KiB
Java
77 lines
1.5 KiB
Java
/**
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* This program demonstrates static methods.
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* @version 1.01 2004-02-19
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* @author Cay Horstmann
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*/
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public class StaticTest
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{
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public static void main(String[] args)
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{
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// fill the staff array with three Employee objects
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Employee[] staff = new Employee[3];
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staff[0] = new Employee("Tom", 40000);
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staff[1] = new Employee("Dick", 60000);
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staff[2] = new Employee("Harry", 65000);
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// print out information about all Employee objects
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for (Employee e : staff)
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{
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e.setId();
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System.out.println("name=" + e.getName() + ",id=" + e.getId() + ",salary="
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+ e.getSalary());
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}
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int n = Employee.getNextId(); // calls static method
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System.out.println("Next available id=" + n);
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}
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}
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class Employee
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{
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private static int nextId = 1;
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private String name;
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private double salary;
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private int id;
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public Employee(String n, double s)
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{
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name = n;
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salary = s;
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id = 0;
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}
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public String getName()
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{
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return name;
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}
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public double getSalary()
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{
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return salary;
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}
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public int getId()
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{
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return id;
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}
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public void setId()
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{
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id = nextId; // set id to next available id
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nextId++;
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}
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public static int getNextId()
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{
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return nextId; // returns static field
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}
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public static void main(String[] args) // unit test
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{
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Employee e = new Employee("Harry", 50000);
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System.out.println(e.getName() + " " + e.getSalary());
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}
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}
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