friend.java

观察者模式

package Observe;

import java.util.Observable;
import java.util.Observer;

public class Friend implements Observer{
	
	private String name;//test
	
	public Friend(String name){
		this.name = name;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public void update(Observable arg0, Object arg1) {
		System.out.println(arg1.getClass());
		if(arg1 instanceof Long){
			System.out.println(name+" "+"已经知道你的电话变为："+arg1.toString());
		}
		
		if(arg1 instanceof Double){
			System.out.println(name+" "+"已经知道你的电话费变为："+arg1.toString());
		}
	}

}