public class Demo {
public static void main(String[] args){
// 借助多态，主人可以给很多动物喂食
Master ma = new Master();
ma.feed(new Animal(), new Food());
ma.feed(new Cat(), new Fish());
ma.feed(new Dog(), new Bone());
}
}
// Animal类及其子类
class Animal{
public void eat(Food f){
System.out.println("我是一个小动物，正在吃" + f.getFood());
}
}
class Cat extends Animal{
public void eat(Food f){
System.out.println("我是一只小猫咪，正在吃" + f.getFood());
}
}
class Dog extends Animal{
public void eat(Food f){
System.out.println("我是一只狗狗，正在吃" + f.getFood());
}
}
// Food及其子类
class Food{
public String getFood(){
return "事物";
}
}
class Fish extends Food{
public String getFood(){
return "鱼";
}
}
class Bone extends Food{
public String getFood(){
return "骨头";
}
}
// Master类
class Master{
public void feed(Animal an, Food f){
an.eat(f);
}
}
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