学步园

</p> <p>public class MediatorTest1<br /> {<br /> public static void main(String[] args)<br /> {<br /> ConcreteMediator m = new ConcreteMediator();</p> <p> ConcreteColleague1 c1 = new ConcreteColleague1(m);<br /> ConcreteColleague2 c2 = new ConcreteColleague2(m);<br /> m.setColleague1(c1);<br /> m.setColleague2(c2);</p> <p> c1.Send("饭吃过了吗？");<br /> c2.Send("没有呢，你打算请客");<br /> System.out.println();<br /> }<br /> }<br /> abstract class Mediator<br /> {<br /> abstract public void Send(String message,Colleague colleague);<br /> }<br /> abstract class Colleague<br /> {<br /> protected Mediator mediator;<br /> public Colleague(Mediator mediator)<br /> {<br /> this.mediator= mediator;<br /> }<br /> }<br /> class ConcreteMediator extends Mediator<br /> {<br /> private ConcreteColleague1 colleague1;<br /> private ConcreteColleague2 colleague2;<br /> public void setColleague1(ConcreteColleague1 colleague1)<br /> {<br /> this.colleague1 = colleague1;<br /> }<br /> public void setColleague2(ConcreteColleague2 colleague2)<br /> {<br /> this.colleague2 = colleague2;<br /> }<br /> public void Send(String message,Colleague colleague)<br /> {<br /> if(colleague == colleague1)<br /> {<br /> colleague2.Notify(message);<br /> }<br /> else<br /> {<br /> colleague1.Notify(message);<br /> }<br /> }<br /> }<br /> class ConcreteColleague1 extends Colleague<br /> {<br /> public ConcreteColleague1(Mediator mediator)<br /> {<br /> super(mediator);<br /> }<br /> public void Send(String message)<br /> {<br /> mediator.Send(message,this);<br /> }<br /> public void Notify(String message)<br /> {<br /> System.out.println("同事1得到信息： "+message);<br /> }<br /> }<br /> class ConcreteColleague2 extends Colleague<br /> {<br /> public ConcreteColleague2(Mediator mediator)<br /> {<br /> super(mediator);<br /> }<br /> public void Send(String message)<br /> {<br /> mediator.Send(message,this);<br /> }<br /> public void Notify(String message)<br /> {<br /> System.out.println("同事2得到信息： "+message);<br /> }<br /> } 

<br /> public class MediatorTest2<br /> {<br /> public static void main(String[] args)<br /> {<br /> UnitedNationSecurityCouncil UNSC = new UnitedNationSecurityCouncil();</p> <p> USA c1 = new USA(UNSC);<br /> Iraq c2 = new Iraq(UNSC);</p> <p> UNSC.setColleague1(c1);<br /> UNSC.setColleague2(c2);</p> <p> c1.Declare("不准研制核武器，否则要发动战争");<br /> c2.Declare("我们没有核武器，也不怕侵略");</p> <p> System.out.println();<br /> }<br /> }<br /> abstract class UnitedNations<br /> {<br /> abstract public void Declare(String message,Country colleague);<br /> }<br /> abstract class Country<br /> {<br /> protected UnitedNations mediator;<br /> public Country(UnitedNations mediator)<br /> {<br /> this.mediator = mediator;<br /> }<br /> }<br /> class USA extends Country<br /> {<br /> public USA(UnitedNations mediator)<br /> {<br /> super(mediator);<br /> }<br /> public void Declare(String message)<br /> {<br /> mediator.Declare(message,this);<br /> }<br /> public void GetMessage(String message)<br /> {<br /> System.out.println("美国获得对方性息："+ message);<br /> }<br /> }<br /> class Iraq extends Country<br /> {<br /> public Iraq(UnitedNations mediator)<br /> {<br /> super(mediator);<br /> }<br /> public void Declare(String message)<br /> {<br /> mediator.Declare(message,this);<br /> }<br /> public void GetMessage(String message)<br /> {<br /> System.out.println("伊拉克获得对方性息："+ message);<br /> }<br /> }<br /> class UnitedNationSecurityCouncil extends UnitedNations<br /> {<br /> public USA colleague1;<br /> public Iraq colleague2;<br /> public void setColleague1(USA colleague1)<br /> {<br /> this.colleague1 = colleague1;<br /> }<br /> public void setColleague2(Iraq colleague2)<br /> {<br /> this.colleague2 = colleague2;<br /> }<br /> public void Declare(String message,Country colleague)<br /> {<br /> if(colleague == colleague1)<br /> {<br /> colleague2.GetMessage(message);<br /> }<br /> else<br /> {<br /> colleague1.GetMessage(message);<br /> }<br /> }<br /> }