多态练习题(通过UML建模语言来实现饲养员喂养动物)

项目需求如下图:

package com.Summer_0428.cn;
/**
 * @author Summer
 * 1.构建一个食物抽象类,Bone和Fish分别为其实现类,通过super传参。
 * 2.构建一个动物类,对于Dog类和Cat类,分别使用多态,使food父类引用实现子类方法。
 * 3.构建饲养员类,分别传入Food类和Animal类,多态的应用。
 *
 */
/**食物父类*/
abstract class Food{
    private String name;
    public Food(String name) {
        this.name = name;
    }
    public String getName() {
        return name;
    }    
}

class Bone extends Food{
    public Bone(String name) {
        super(name);
    }
    
}

class Fish extends Food{
    public Fish(String name) {
        super(name);
    }
    
}

/**动物父类*/
abstract class Animal{//多态
    public abstract void eat(Food food);
}

class Dog extends Animal{

    @Override
    public void eat(Food food) {//多态
        System.out.println("小狗吃"+food.getName());        
    }    
}

class Cat extends Animal{//多态

    @Override
    public void eat(Food food) {
        System.out.println("小猫吃"+food.getName());        
    }    
}

class Feeder{
    public void feed(Food food,Animal animal){//多态
        System.out.println("饲养员喂养");
        animal.eat(food);
    }
}

public class TestFeeder {

    public static void main(String[] args) {
        Bone bone = new Bone("骨头");
        Fish fish = new Fish("鱼");
        Dog dog = new Dog();
        Cat cat = new Cat();
        Feeder Tom = new Feeder();
        Tom.feed(bone, dog);
        Tom.feed(fish, cat);

    }

}

 

posted @ 2019-04-28 21:16  Geek张东坡  阅读(861)  评论(1编辑  收藏  举报