Java 面向对象 之 多态实例1

/**
	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;
	}

}


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Java 面向对象 之 多态实例1