面向对象多方法3

类1package fangfa3;public class Food {        public String name;}

类2package fangfa3;public class Feeder {    public String name;    public Animal a;    public void feed(){        System.out.println(name+"喂"+a.name);    }}}

类3package fangfa3;public class Animal {    public String name;    public Food f;    public void eat(){        System.out.println(name+"吃"+f.name);    }}

测试类package fangfa3;public class Test {    public static void main(String[] args) {        Food food = new Food();        food.name = "竹笋";        Animal a = new Animal();        a.name = "大熊猫";        a.f=food;        Feeder feeder = new Feeder();        feeder.name = "张三";        feeder.a=a;        feeder.feed();        a.eat();    }}