supernotserial.java

SCJP认证考试资料

import java.io.*;
class SuperNotSerial {
  public static void main(String [] args) {

    Dog d = new Dog(35, "Fido");
    System.out.println("before: " + d.name + " "
                       + d.weight);
    try {
      FileOutputStream fs = new FileOutputStream("testSer.ser");
      ObjectOutputStream os = new ObjectOutputStream(fs);
      os.writeObject(d);
      os.close ();
    } catch (Exception e) { e.printStackTrace(); }
    try {
      FileInputStream fis = new FileInputSream("testSer.ser");
      ObjectInputStream ois = new ObjectInputStream(fis);
      d = (Dog) ois.readObject();
      ois.close();
    } catch (Exception e) { e.printStackTrace(); }

    System.out.println("after:  " + d.name + " "
                       + d.weight);
  }
}
class Dog extends Animal implements Serializable {
  String name;

  Dog(int w, String n) {
    weight = w;          // inherited
    name = n;            // not inherited
  }
}
class Animal {           // not serializable !
  int weight = 42;
}