107 lines
2.2 KiB
Java
107 lines
2.2 KiB
Java
/**
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@version 1.20 17 Aug 1998
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@author Cay Horstmann
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*/
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import java.io.*;
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import java.util.*;
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public class SerialCloneTest
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{
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public static void main(String[] args)
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{
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Employee harry = new Employee("Harry Hacker", 35000, 1989, 10, 1);
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// clone harry
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Employee harry2 = (Employee) harry.clone();
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// mutate harry
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harry.raiseSalary(10);
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// now harry and the clone are different
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System.out.println(harry);
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System.out.println(harry2);
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}
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}
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/**
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A class whose clone method uses serialization.
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*/
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class SerialCloneable implements Cloneable, Serializable
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{
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public Object clone()
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{
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try
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{
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// save the object to a byte array
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ByteArrayOutputStream bout = new ByteArrayOutputStream();
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ObjectOutputStream out = new ObjectOutputStream(bout);
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out.writeObject(this);
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out.close();
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// read a clone of the object from the byte array
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
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ObjectInputStream in = new ObjectInputStream(bin);
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Object ret = in.readObject();
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in.close();
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return ret;
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}
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catch (Exception e)
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{
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return null;
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}
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}
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}
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/**
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The familiar Employee class, redefined to extend the
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SerialCloneable class.
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*/
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class Employee extends SerialCloneable
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{
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public Employee(String n, double s, int year, int month, int day)
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{
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name = n;
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salary = s;
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GregorianCalendar calendar = new GregorianCalendar(year, month - 1, day);
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hireDay = calendar.getTime();
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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 Date getHireDay()
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{
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return hireDay;
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}
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public void raiseSalary(double byPercent)
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{
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double raise = salary * byPercent / 100;
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salary += raise;
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}
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public String toString()
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{
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return getClass().getName()
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+ "[name=" + name
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+ ",salary=" + salary
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+ ",hireDay=" + hireDay
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+ "]";
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}
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private String name;
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private double salary;
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private Date hireDay;
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}
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