JAvaマルチステートとダイナミックバインド

package j02_polymorphism;

public class j02_main_poly {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("j02_main_polymorphism RUN...");
        Master me = new Master();
        me.feed(new Animal(), new Food());
        me.feed(new Cat(), new Fish());
        me.feed(new Dog(), new Bone());

    }

}

class Animal{
    public void eat(Food f){
        System.out.println("     ，   " + f.getFood());
    }
}

class Cat extends Animal{
    public void eat(Food f){
        System.out.println("cat eat " + f.getFood());
    }
}

class Dog extends Animal{
    public void eat(Food f){
        System.out.println("Dog eat " + f.getFood());
    }
}


class Food{
    public String getFood(){
        return "food1";
    }
}

class Fish extends Food{
    public String getFood(){
        return "fish_food";
    }
}

class Bone extends Food{
    public String getFood(){
        return "Bone_food";
    }
}

class Master{
    public void feed(Animal an, Food f){
        an.eat(f);
    }
}