phonenumber.java

观察者模式

package Observe;

import java.util.Observable;

public class PhoneNumber extends Observable {
	private Long phoneNumber;
	private double bill;
	/**
	 * @return the phoneNumber
	 */
	public Long getPhoneNumber() {
		return phoneNumber;
	}
	/**
	 * @param phoneNumber the phoneNumber to set
	 */
	public void setPhoneNumber(Long phoneNumber) {
		this.phoneNumber = phoneNumber;

	}
	/**
	 * @return the bill
	 */
	public double getBill() {
		return bill;
	}
	/**
	 * @param bill the bill to set
	 */
	public void setBill(double bill) {
		this.bill = bill;
		this.setChanged();
		this.notifyObservers(bill);
	}
	public PhoneNumber(){

		this.addFriend(new Friend("Tom"));
		this.addFriend(new Friend("Jack"));
		this.addFriend(new Friend("Mike"));
	}
    public void addFriend(Friend f){
    	super.addObserver(f);
    }
    public void setNumber(Long phoneNumber){
    	this.phoneNumber=phoneNumber;
    	this.setChanged();//设置监控点
    	this.notifyObservers(phoneNumber);
    }
    
}