简单的java实验，涉及到 类继承以及接口问题，方法体的重写（区别于重载）

 1  package  test ;
 2  abstract class Animal
 3  {
 4     abstract void cry();
 5     abstract String getAnimalName();
 6  }
 7   class dogs extends Animal
 8  {
 9       
10     @Override
11     void cry() {
12         // TODO Auto-generated method stub
13         System.out.println("小狗"+" 旺旺 ");
14     }
15 
16     @Override
17     String getAnimalName() {
18         // TODO Auto-generated method stub
19         return "大黄";
20     }
21 
22  }
23   class cats extends Animal
24   {
25 
26     @Override
27     void cry() {
28         // TODO Auto-generated method stub
29         System.out.println("小猫"+"喵喵 ");
30     }
31 
32     @Override
33     String getAnimalName() {
34         // TODO Auto-generated method stub
35         return "小红";
36     }
37       
38   }
39   class Simulator
40   {
41      void display(Animal myAnimal)
42      {
43          myAnimal.cry();
44          System.out.println(myAnimal.getAnimalName());
45      }
46   }
47  public class hello 
48  {     
49      public static void main(String [] args)
50      {
51          //dogs mydog = new dogs();
52          //cats mycat = new cats();
53          Simulator mySimulator = new Simulator();
54          mySimulator.display(new dogs());
55          mySimulator.display(new cats());
56      }
57 
58  }