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());

      }

  }