73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
//: io/MyWorld.java
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// ©2015 MindView LLC: see Copyright.txt
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import java.io.*;
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import java.util.*;
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import static com.mindviewinc.util.Print.*;
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class House implements Serializable {}
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class Animal implements Serializable {
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private String name;
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private House preferredHouse;
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Animal(String nm, House h) {
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name = nm;
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preferredHouse = h;
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}
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@Override
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public String toString() {
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return name + "[" + super.toString() +
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"], " + preferredHouse + "\n";
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}
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}
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public class MyWorld {
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public static void main(String[] args)
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throws IOException, ClassNotFoundException {
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House house = new House();
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List<Animal> animals = new ArrayList<>();
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animals.add(new Animal("Bosco the dog", house));
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animals.add(new Animal("Ralph the hamster", house));
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animals.add(new Animal("Molly the cat", house));
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print("animals: " + animals);
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ByteArrayOutputStream buf1 =
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new ByteArrayOutputStream();
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ObjectOutputStream o1 = new ObjectOutputStream(buf1);
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o1.writeObject(animals);
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o1.writeObject(animals); // Write a 2nd set
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// Write to a different stream:
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ByteArrayOutputStream buf2 =
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new ByteArrayOutputStream();
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ObjectOutputStream o2 = new ObjectOutputStream(buf2);
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o2.writeObject(animals);
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// Now get them back:
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ObjectInputStream in1 = new ObjectInputStream(
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new ByteArrayInputStream(buf1.toByteArray()));
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ObjectInputStream in2 = new ObjectInputStream(
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new ByteArrayInputStream(buf2.toByteArray()));
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List
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animals1 = (List)in1.readObject(),
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animals2 = (List)in1.readObject(),
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animals3 = (List)in2.readObject();
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print("animals1: " + animals1);
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print("animals2: " + animals2);
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print("animals3: " + animals3);
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}
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} /* Output:
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animals: [Bosco the dog[Animal@19e0bfd], House@139a55
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, Ralph the hamster[Animal@1db9742], House@139a55
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, Molly the cat[Animal@106d69c], House@139a55
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]
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animals1: [Bosco the dog[Animal@10bedb4], House@103dbd3
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, Ralph the hamster[Animal@167cf4d], House@103dbd3
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, Molly the cat[Animal@a987ac], House@103dbd3
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]
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animals2: [Bosco the dog[Animal@10bedb4], House@103dbd3
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, Ralph the hamster[Animal@167cf4d], House@103dbd3
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, Molly the cat[Animal@a987ac], House@103dbd3
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]
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animals3: [Bosco the dog[Animal@a3a380], House@1453f44
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, Ralph the hamster[Animal@ad8086], House@1453f44
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, Molly the cat[Animal@be858], House@1453f44
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]
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*///:~
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