工厂方法和观察者模式的一个真实案例

  1 import java.util.ArrayList;
  2
  3 class Manager
  4 {
  5     private String name; //经理的名字
  6     public Manager(String string) {
  7         name=string;
  8     }
  9     public void update(String id)
 10     {
 11         System.out.println("哈哈"+id+"房子已经被买了，好开心");
 12     }
 13
 14
 15 }
 16 //抽象房子
 17 abstract class House
 18 {
 19     private String id;
 20     private int price;
 21     private int  status=0;// status=0没有被卖掉
 22     private ArrayList<Manager> m=new ArrayList<Manager>();
 23     public void setStatus()
 24     {
 25         status=1;   //卖房子了
 26         for(Manager ma:m)
 27         {
 28         ma.update(id);
 29         }
 30     }
 31     public House(String id,int price)
 32     {
 33         this.id=id;
 34         this.price=price;
 35     }
 36     public  void addObserver(Manager ma)
 37     {
 38         m.add(ma);
 39     }
 40
 41
 42 }
 43 //具体房子
 44 class BigHouse extends House
 45 {
 46     public BigHouse(String id, int price) {
 47         super(id, price);
 48         // TODO Auto-generated constructor stub
 49     }
 50
 51     public void method()
 52     {
 53         System.out.println("BigHouse");
 54
 55     }
 56 }
 57 //具体房子
 58 class smallHouse extends House
 59 {
 60
 61     public smallHouse(String id, int price) {
 62         super(id, price);
 63         // TODO Auto-generated constructor stub
 64     }
 65
 66     public void met()
 67     {
 68         System.out.println("smallHouse");
 69     }
 70 }
 71 //工厂接口
 72 interface factory
 73 {
 74     public House getInstance(String id,int price);
 75
 76 }
 77 //大房子工厂
 78 class BigFactory implements factory
 79 {
 80
 81     @Override
 82     public House getInstance(String id, int price) {
 83         // TODO Auto-generated method stub
 84         return new BigHouse(id,price);
 85     }
 86
 87
 88 }
 89 class smallFactory implements factory
 90 {
 91
 92     @Override
 93     public House getInstance(String id, int price) {
 94         // TODO Auto-generated method stub
 95         return new smallHouse(id,price);
 96     }
 97
 98
 99
100 }
101
102
103 public class 设计模式1 {
104
105     /**
106      * @param args
107      */
108     public static void main(String[] args) {
109         // TODO Auto-generated method stub
110     //创建一大房子对象
111     House h1=new BigFactory().getInstance("0001", 10000000);
112     //一个小房子对象
113     ((BigHouse) h1).method();
114     House h2=new smallFactory().getInstance("333", 100);
115     Manager ma=new Manager("zhangsan");
116     h2.addObserver(ma);
117     h2.setStatus();
118
119
120
121
122
123     //卖掉
124
125
126
127
128     }
129
130 }

http://blog.csdn.net/lovelion/article/details/7430515

工厂方法和观察者模式的一个真实案例