java学习笔记_序列化

1 public class dog {
2     public dog(String n) { name = n; }
3     public dog() { name = ""; }
4     public String name;
5 }

 1 import java.io.*;
 2 
 3 public class snoopy extends dog implements Serializable {
 4     public int age;
 5     public snoopy(String n, int a) {
 6         super(n);
 7         System.out.println("Constr...");
 8         System.out.println(n);
 9         if ("" == n) {
10             System.out.println("empty");
11         }
12         age = a;
13     }
14     
15     public static void main(String[] args) {
16         snoopy sn = new snoopy("Snoopy", 5);
17         
18         try {
19             FileOutputStream fs = new FileOutputStream("snoopy.ser");
20             ObjectOutputStream os = new ObjectOutputStream(fs);
21             os.writeObject(sn);
22             os.close();
23             
24             ObjectInputStream is = new ObjectInputStream(new FileInputStream("snoopy.ser"));
25             System.out.println("Begin---");
26             snoopy s = (snoopy) is.readObject();
27 
28         } catch(Exception ex) {
29             ex.printStackTrace();
30         }
31     }
32 }