import java.io.*;
import java.util.*;

class Pair implements Serializable {
  public Object first;
  public Object second;
}

class Holder implements Serializable {
  public Object value;
}

public class SerializableTest {

  public static void main(String[] args) {

    Date today = new Date();
    Holder a = new Holder();
    a.value = today;
    Holder b = new Holder();
    b.value = today;
    Pair c = new Pair();
    c.first = a;
    c.second = b;

    try {
      FileOutputStream f = new FileOutputStream("saveState");
      ObjectOutputStream s = new ObjectOutputStream(f);
      s.writeObject("The value of c is");
      s.writeObject(c);
      s.close();
    } catch (IOException e) {
      System.out.println("received error " + e);
      e.printStackTrace();
    }
  }
}