Hi,
I was goin through Serialization! from KS & BB book. I came to know if superclass does not implement Serializable, when object(of subclass-implementing serializable) is read back, the states(inherited instance variables) that it inherited from its superclass are set to default.
I also saw an example and implemented it! however it is not givin me the desired RESULT.
import java.io.*;
class Animal{
int weight = 42;
}
class Dog extends Animal implements Serializable{
String name;
Dog(String n, int w){
name = n;
weight = w;
}
}
public class SuperNotSerail {
public static void main(String[] args){
Dog d = new Dog("test", 22);
System.out.println("before: "+d.name+" "+d.weight);
try{
File f = new File("c:/shivey/scjprob", "SuperNotSerial.txt");
FileOutputStream fos = new FileOutputStream(f);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(d);
oos.close();
//Now Taking Written Object Back
FileInputStream fis = new FileInputStream(f);
ObjectInputStream ois = new ObjectInputStream(fis);
ois.readObject();
ois.close();
}catch(Exception e){
e.printStackTrace();
}
System.out.println("after: "+d.name+" "+d.weight);
}
}
Both times the output is
before:
test 22
after: test 22
I am not sure why? Have i done any mistake?
Pls, i have been always a lil in this subject(Serializable).
Thanks,
Shivey
