// ********** MediatorDemo.java **********
interface Mediator {
  public void createColleagues();
  public void colleagueChanged(Colleague c);
}
class ConcreteMediator1 implements Mediator {
  private ConcreteColleague1 c1;
  private ConcreteColleague2 c2;
  public void createColleagues() {
    c1 = new ConcreteColleague1(this);
    c2 = new ConcreteColleague2(this);
  }
  public void colleagueChanged(Colleague c) {
    if (c == c1) {
      int i = c1.get();
      c2.operation2(i);
    } else {
      int i = c2.get();
      c1.operation1(i);
    } 
  }
  public void trigger() { c1.set(0); c2.set(0); }
}
abstract class Colleague {
  private Mediator mediator;
  public Colleague(Mediator mediator) { this.mediator = mediator; }
  public void changed() { mediator.colleagueChanged(this); }
}
class ConcreteColleague1 extends Colleague {
  private int i;
  public ConcreteColleague1(Mediator mediator) { super(mediator); }
  public void set(int i) { this.i = i; changed(); }
  public int get() { return i; }
  public void operation1(int j) {}
}
class ConcreteColleague2 extends Colleague {
  private int i;
  public ConcreteColleague2(Mediator mediator) { super(mediator); }
  public void set(int i) { this.i = i; changed(); }
  public int get() { return i; }
  public void operation2(int j) {}
}
public class MediatorDemo {
  private static final int MAX = 1000; 
  public static void main(String args[]) {
    long t1 = System.currentTimeMillis();
    for (int i=0; i<10*MAX; i++) {
      ConcreteMediator1 mediator = new ConcreteMediator1();
      mediator.createColleagues();
      for (int j=0; j<MAX; j++) 
        mediator.trigger();
    }
    long t2 = System.currentTimeMillis();
    System.out.print((t2-t1)+" ");
    System.out.flush();
  }
}