package io;

import java.io.*;

import java.util.*;

/**

* RUN:

* javac io/MyWorld.java && java io.MyWorld

*

* OUTPUT:

*

*/

public class MyWorld {

public static void main(String[] args) throws IOException, ClassNotFoundException {

House house = new House();

List<Animal> animals = new ArrayList<Animal>();

animals.add(new Animal("Bosco the dog", house));

animals.add(new Animal("Ralph the hamster", house));

animals.add(new Animal("Molly the cat", house));

System.out.println("animals: "+animals);

ByteArrayOutputStream buf1 = new ByteArrayOutputStream();

ObjectOutputStream o1 = new ObjectOutputStream(buf1);

o1.writeObject(animals);

o1.writeObject(animals); // second copy

ByteArrayOutputStream buf2 = new ByteArrayOutputStream();

ObjectOutputStream o2 = new ObjectOutputStream(buf2);

o2.writeObject(animals);

ObjectInputStream in1 = new ObjectInputStream(

new ByteArrayInputStream(buf1.toByteArray())

);

ObjectInputStream in2 = new ObjectInputStream(

new ByteArrayInputStream(buf2.toByteArray())

);

List animals1 = (List)in1.readObject(),

animals2 = (List)in1.readObject(),

animals3 = (List)in2.readObject();

System.out.println("animals1: "+animals1);

System.out.println("animals2: "+animals2);

System.out.println("animals3: "+animals3);

}

}

class House implements Serializable {}

class Animal implements Serializable {

private String name;

private House preferredHouse;

Animal(String name, House house) {

this.name = name;

this.preferredHouse = house;

}

public String toString() {

return name + "["+ super.toString() + "], " + preferredHouse + "\n";

}

}