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());
      }

  }