java 动物声音 模拟器

1 public abstract class Animal {  
2     
3     public abstract void cry();  
4     public abstract String getAnimalName();  
5   
6 }

1 public class Simulator {  
2     
3     public void playSound(Animal animal) {        
4         System.out.print(animal.getAnimalName()+":");      
5         animal.cry();         
6     }  
7 }  

public class Dog extends Animal{ 
    public void cry() {  
        System.out.println("汪汪汪...");      
    }  
   
    public String getAnimalName() {  
        return "小狗";  
    }  
  
}

public class Cat extends Animal{  
       
    public void cry() {  
        System.out.println("喵喵喵...");  
    }  
    
    public String getAnimalName() {  
        return "小猫";  
    }  
} 

public class Application {  
      
    public static void main(String[] args) {  
  
        Simulator simulator=new Simulator();  
        simulator.playSound(new Dog());          
        simulator.playSound(new Cat());  
    }  
}