人在江湖

   1: import java.util.ArrayList;

   2:  

   3: abstract class AbstractMediator{

   4:  public abstract void register(AbstractColleague ac);

   5:  public abstract void ColleagueChanged(AbstractColleague ac);

   6: }

   7: abstract class AbstractColleague{

   8:  private AbstractMediator med;

   9:  public AbstractColleague(AbstractMediator mediator){

  10:   this.med=mediator;

  11:  }

  12:  public abstract void action();

  13:  public void changed(){

  14:   med.ColleagueChanged(this);

  15:  }

  16: }

  17: class ConcreteMediator extends AbstractMediator{

  18:  

  19:  private ArrayList<AbstractColleague> colleagueList=new ArrayList<AbstractColleague>();

  20:  public void register(AbstractColleague ac) {

  21:   colleagueList.add(ac); 

  22:  }

  23:  

  24:  public void ColleagueChanged(AbstractColleague ac) {

  25:   for(int i=0;i<colleagueList.size();i++){

  26:    if(colleagueList.get(i)!=ac){

  27:     colleagueList.get(i).action();

  28:    }

  29:   }

  30:  }

  31: }

  32:  

  33: class ConcreteColleagueA extends AbstractColleague{

  34:     public ConcreteColleagueA(AbstractMediator mediator){

  35:      super(mediator);

  36:      mediator.register(this);

  37:     }

  38:  public void action() {

  39:   System.out.println("AAAAAAAAAAAAAAA");

  40:  }

  41: }

  42: class ConcreteColleagueC extends AbstractColleague{

  43:     public ConcreteColleagueC(AbstractMediator mediator){

  44:      super(mediator);

  45:      mediator.register(this);

  46:     }

  47:  public void action() {

  48:   System.out.println("CCCCCCCCCCCCCCC");

  49:  }

  50: }

  51: class ConcreteColleagueB extends AbstractColleague{

  52:   public ConcreteColleagueB(AbstractMediator mediator){

  53:       super(mediator);

  54:       mediator.register(this);

  55:      }

  56:   public void action() {

  57:    System.out.println("BBBBBBBBBBBBBBB");

  58:   }

  59: }

  60: class test{

  61:  public static void main(String[] args){

  62:  AbstractMediator mediator=new ConcreteMediator();

  63:  AbstractColleague colleagueA=new ConcreteColleagueA(mediator);

  64:  AbstractColleague colleagueB=new ConcreteColleagueB(mediator);

  65:  AbstractColleague colleagueC=new ConcreteColleagueC(mediator);

  66:  colleagueA.changed();

  67:  colleagueB.changed();

  68:  colleagueC.changed();

  69:  }

  70: }

  71: