package designpattern.observer;

/**

* 观察者模式客户端代码

*

* @author liu yuning

*

*/

public class ObserverClient {

public static void main(String[] args) {

ConcreteSubject concreteSubject = new ConcreteSubject();

concreteSubject.attach(new ConcreteObserver(concreteSubject, "X"));

concreteSubject.attach(new ConcreteObserver(concreteSubject, "Y"));

concreteSubject.attach(new ConcreteObserver(concreteSubject, "Z"));

concreteSubject.setSubjectState("ABC");

concreteSubject.notifyObserver();

}

}