1. import java.io.*;2. public class Foo implements Serializable {3.   public int x, y; 4.   public Foo( int x, int y ) { this.x = x; this.y = y;}5. 6.   private void writeObject ( ObjectOut put Stream s) 7.    throws IOException { 8.    s.WriteInt (x); s.WriteInt (y);9.   }10. 11.   private void readObject( ObjectInputStream s)12.    throws IOException, ClassNotFoundException { 13. 14    /* insert code here */ 15. 16.   }17. }
s.defaultReadObject();
this = s.defaultReadObject();
y = s.readInt(); x = s.readInt();
x = s.readInt(); y = s.readInt();