Java 動物聲音“模擬器”（用接口實現）

(1)編寫接口Animal (Animal.java)

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

(2)編寫模擬類Simulator (Simulator.java)

public class Simulator {
    public void playSound(Animal animal) {
        System.out.print("正在播放模擬" + animal.getAnimalName() +"的聲音：");
        animal.cry();
    }
}

(3)編寫Dog類和Cat類 (Dog.java、Cat.java)
Dog類：

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

Cat類：

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

(4)編寫主類Application (Application.java)

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