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）

 package  test ;
 abstract class Animal
 {
    abstract void cry();
    abstract String getAnimalName();
 }
  class dogs extends Animal
 {
      
    @Override
    void cry() {
        // TODO Auto-generated method stub
        System.out.println("小狗"+" 旺旺 ");
    }

    @Override
    String getAnimalName() {
        // TODO Auto-generated method stub
        return "大黄";
    }

 }
  class cats extends Animal
  {

    @Override
    void cry() {
        // TODO Auto-generated method stub
        System.out.println("小猫"+"喵喵 ");
    }

    @Override
    String getAnimalName() {
        // TODO Auto-generated method stub
        return "小红";
    }
      
  }
  class Simulator
  {
     void display(Animal myAnimal)
     {
         myAnimal.cry();
         System.out.println(myAnimal.getAnimalName());
     }
  }
 public class hello 
 {     
     public static void main(String [] args)
     {
         //dogs mydog = new dogs();
         //cats mycat = new cats();
         Simulator mySimulator = new Simulator();
         mySimulator.display(new dogs());
         mySimulator.display(new cats());
     }

 }