观察者模式

最新推荐文章于 2025-06-16 09:51:36 发布

qsbxx

最新推荐文章于 2025-06-16 09:51:36 发布

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CC 4.0 BY-SA版权

文章标签： Java UP

本文链接：https://blog.youkuaiyun.com/qsbxx/article/details/83356892

package cat;

public class MainTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Cat cat=new Cat();

		Mouse ms1=new Mouse("m1",cat);
		Mouse ms2=new Mouse("m2",cat);
		Master master=new Master("master",cat);

		cat.aimAt();

	}

}

package cat;

public interface Observe {

	public void action();

}

package cat;

public class Mouse implements Observe {

	private String  name;

	public Mouse(String name,Cat cat) {
		this.name=name;
		cat.addOb(this);
	}

	public void action() {
		System.out.println(name + " wake up!");
	}

}

package cat;

public class Master implements Observe {

	private String name;

	public Master(String name,Cat cat) {
		this.name=name;
		cat.addOb(this);
	}

	public void action() {
		System.out.println(name + " wake up!");

	}

}

package cat;

import java.util.ArrayList;
import java.util.List;

public class Cat {

	private List<Observe> list=null;

	public Cat(){
		list=new ArrayList<Observe>();
	}

	public void aimAt() {
		for(Observe ob:list){
			ob.action();
		}
	}

	public void addOb(Observe ob){
		list.add(ob);
	}


}