75 lines
2.5 KiB
Java
75 lines
2.5 KiB
Java
// serialization/MyWorld.java
|
|
// (c)2016 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
|
|
import java.io.*;
|
|
import java.util.*;
|
|
|
|
class House implements Serializable {}
|
|
|
|
class Animal implements Serializable {
|
|
private String name;
|
|
private House preferredHouse;
|
|
Animal(String nm, House h) {
|
|
name = nm;
|
|
preferredHouse = h;
|
|
}
|
|
@Override
|
|
public String toString() {
|
|
return name + "[" + super.toString() +
|
|
"], " + preferredHouse + "\n";
|
|
}
|
|
}
|
|
|
|
public class MyWorld {
|
|
public static void main(String[] args)
|
|
throws IOException, ClassNotFoundException {
|
|
House house = new House();
|
|
List<Animal> animals = new ArrayList<>();
|
|
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); // Write a 2nd set
|
|
// Write to a different stream:
|
|
ByteArrayOutputStream buf2 =
|
|
new ByteArrayOutputStream();
|
|
ObjectOutputStream o2 = new ObjectOutputStream(buf2);
|
|
o2.writeObject(animals);
|
|
// Now get them back:
|
|
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);
|
|
}
|
|
}
|
|
/* Output:
|
|
animals: [Bosco the dog[Animal@19e0bfd], House@139a55
|
|
, Ralph the hamster[Animal@1db9742], House@139a55
|
|
, Molly the cat[Animal@106d69c], House@139a55
|
|
]
|
|
animals1: [Bosco the dog[Animal@10bedb4], House@103dbd3
|
|
, Ralph the hamster[Animal@167cf4d], House@103dbd3
|
|
, Molly the cat[Animal@a987ac], House@103dbd3
|
|
]
|
|
animals2: [Bosco the dog[Animal@10bedb4], House@103dbd3
|
|
, Ralph the hamster[Animal@167cf4d], House@103dbd3
|
|
, Molly the cat[Animal@a987ac], House@103dbd3
|
|
]
|
|
animals3: [Bosco the dog[Animal@a3a380], House@1453f44
|
|
, Ralph the hamster[Animal@ad8086], House@1453f44
|
|
, Molly the cat[Animal@be858], House@1453f44
|
|
]
|
|
*/
|