import java.io.*;

public class TestSingle {

  public static void main(String[] args) throws Exception {

    if ("in".equals(args[0])) {
      ObjectInputStream in = new ObjectInputStream(new FileInputStream(args[1]));
      Single s = (Single) in.readObject();
      in.close();

      System.out.println("same ? " + (s == Single.getInstance()));

    } else {
      ObjectOutputStream o = new ObjectOutputStream(new FileOutputStream(args[1]));
      o.writeObject(Single.getInstance());
      o.close();
      System.out.println("written " + args[1]);
    }
    
  }
}