外观模式-多了个办事处

 1 public class Facade {
 2 
 3     public static void main(String[] args) {
 4         Facade1 f = new Facade1();
 5         f.ab();
 6         f.cd();
 7     }
 8 }
 9 //外观类
10 class Facade1 {
11 
12     private A a;
13     private B b;
14     private C c;
15     private D d;
16     public Facade1() {
17         a = new A();
18         b = new B();
19         c = new C();
20         d = new D();
21     }
22     public void ab(){
23         System.out.println("执行第一组方法");
24         a.startA();
25         b.startB();
26     }
27     public void cd() {
28         System.out.println("执行第二组方法");
29         c.startC();
30         d.startD();
31     }
32 
33 }
34 class A{
35     public void startA() {
36         System.out.println("A");
37     }
38 }
39 class B{
40     public void startB() {
41         System.out.println("B");
42     }    
43 }
44 class C{
45     public void startC() {
46         System.out.println("C");
47     }    
48 }
49 class D{
50     public void startD() {
51         System.out.println("D");
52     }    
53 }