继承的一个简单例子

package com;

public class Cleaner {
	public int price;

	public Cleaner(int price) {
		this.price = price;
	}

	public void clean() {
		System.out.println("可以去污");
	}

	public static void main(String[] args) {
		Soap s = new Soap();
		System.out.println("肥皂的价格：" + s.price);
		s.clean();
		s.shape();
		WashingPowder p = new WashingPowder();
		System.out.println("洗衣粉的价格：" + p.price);
		p.clean();
		p.shape();
	}

}

class Soap extends Cleaner {
	public Soap() {
		super(5);
	}

	public void shape() {
		System.out.println("呈块状");
	}
}

class WashingPowder extends Cleaner {
	public WashingPowder() {
		super(10);
	}

	public void shape() {
		System.out.println("呈粉末状");
	}
}