面向对像多方法4

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

类2package fangfa4;public class Feeder {    public String name;    public String feed(Animal a){        return name+"喂"+a.name;    }}

类3package fangfa4;public class Animal {    public String name;    public String eat(Food f){        return name+"吃"+f.name;    }}

测试类package fangfa4;public class Test {    public static void main(String[] args) {        Feeder feeder = new Feeder();        feeder.name = "张三";        Animal a = new Animal();        a.name = "大熊猫";        Food food = new Food();        food.name = "竹笋";        String mess=feeder.feed(a);        String mess1=a.eat(food);        System.out.println(mess);        System.out.println(mess1);    }}