西游记之设计模式原则——里氏代换原则

 1 package lishidaihuan;
 2 
 3 class TangSeng {
 4     public void QuJing() {
 5         System.out.println("施主，贫僧自东土大唐而来，去往西天拜佛求经！");
 6     }
 7 }
 8 
 9 class TuDi extends TangSeng {
10     public void QuJing() {
11         super.QuJing();
12         System.out.println("降妖除魔！");
13     }
14 }
15 
16 public class LiShiDaiHuan {
17 
18     public static void main(String[] args) {
19         // TODO Auto-generated method stub
20 
21         TangSeng tangSeng = new TangSeng();
22         System.out.println("唐僧：");
23         tangSeng.QuJing();
24 
25         tangSeng = new TuDi();
26         System.out.println("徒弟：");
27         tangSeng.QuJing();
28     }
29 }