java 动物声音 模拟器

课堂练习：教材143页4.编程题

 

Animal类

public abstract class Animal {  
    
    public abstract void cry();  
    public abstract String getAnimalName();  
  
}

 

Simulator类

public class Simulator {  
    
    public void playSound(Animal animal) {        
        System.out.print(animal.getAnimalName()+":");      
        animal.cry();         
    }  
}  

 

Dog 类

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

 

Cat类

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

 

Application类

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

 

运行结果：