package interfacepackage;

public interface Destination {
String readLabel();
}

package interfacepackage;

public interface Contents {

int value();

}

package debug;

import interfacepackage.Contents;
import interfacepackage.Destination;

public class Tester {
private int valueRate = 2;

private class PContent implements Contents {
  private int i = 11 * valueRate;

  public int value() {
   return i;
  }
}

protected class PDestination implements Destination {
  private String label;

  private PDestination(String whereTo) {
   label = whereTo;
  }

  public String readLabel() {
   return label;
  }
}

public Destination dest(String s) {
  return new PDestination(s);
}

public Contents cont() {
  return new PContent();
}
public static void main(String args[])
{
  Tester p = new Tester();
   Contents c = p.cont();
   System.out.println(c.value());
   Destination d = p.dest(\"天外水火\");
   System.out.println(d.readLabel());
   System.out.println(\"done\");
}
}