Java第六章:动物声音“模拟器”（接口）

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

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

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

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

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