http://www.verejava.com/?id=16992843565554
/**
题目: 孩子吃(苹果,葡萄,芒果)
思路：
1. 抽象出类 : 孩子(Baby), 苹果(Apple),葡萄(Grape)
2. 找出类的关系: 苹果,葡萄 -> 孩子
3. 找出属性: 孩子(姓名,苹果引用,葡萄引用) 苹果(名称) 葡萄(名称)
4. 找出方法: 孩子吃(eat)苹果或者葡萄
*/
public class Polymorphism2 {
public static void main(String[] args) {
//实例化一个Baby
Baby baby = new Baby("李明");
//实例化一个苹果 和 一个葡萄
Apple apple = new Apple("红富士");
Grape grape = new Grape("黑葡萄");
Mango mango = new Mango("大芒果");
//李明吃苹果和葡萄
baby.eat(apple);
System.out.println(baby.getName() + " 高兴的说我吃了 " + baby.getApple().getName());
baby.eat(grape);
System.out.println(baby.getName() + " 高兴的说我吃了 " + baby.getGrape().getName());
baby.eat(mango);
System.out.println(baby.getName() + " 高兴的说我吃了 " + baby.getMango().getName());
}
}
class Baby {
private Apple apple;
private Grape grape;
private Mango mango;
private String name;
public Baby(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
public Apple getApple() {
return this.apple;
}
public Grape getGrape() {
return this.grape;
}
public Mango getMango() {
return this.mango;
}
//吃苹果
public void eat(Apple apple) {
this.apple = apple;
}
//吃葡萄
public void eat(Grape grape) {
this.grape = grape;
}
//吃芒果
public void eat(Mango mango) {
this.mango = mango;
}
}
class Apple {
private String name;
public Apple(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}
class Grape {
private String name;
public Grape(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}
class Mango {
private String name;
public Mango(String name) {
this.name = name;
}
public String getName() {
return this.name;
}
}
