大话设计模式_工厂方法模式

大学生和社区志愿者学习雷锋帮助老人，扫地，洗衣服，买米为例.

package com.wzs.design;

/**
 * 大话设计模式--page73 工厂方法
 * 
 * @author Administrator
 * 
 */
public class FactoryMethod {
	public static void main(String[] args) {
		IFactory iFactory = new UndergraduateFactory();// 大学生雷锋工厂
		iFactory.createLeiFeng().buyRice();
		iFactory.createLeiFeng().wash();
		iFactory.createLeiFeng().sweep();
		System.out.println();
		iFactory = new VolunteerFactory();// 志愿者雷锋工厂
		iFactory.createLeiFeng().buyRice();
		iFactory.createLeiFeng().wash();
		iFactory.createLeiFeng().sweep();
	}
}

/*
 * 创建雷锋的工厂
 */
interface IFactory {
	LeiFeng createLeiFeng();
}

/*
 * 大学生雷锋工厂
 */
class UndergraduateFactory implements IFactory {

	@Override
	public LeiFeng createLeiFeng() {
		return new Undergraduate();
	}

}

/*
 * 志愿者雷锋工厂
 */
class VolunteerFactory implements IFactory {

	@Override
	public LeiFeng createLeiFeng() {
		return new Volunteer();
	}

}

/*
 * 雷锋
 */
abstract class LeiFeng {
	public abstract void sweep();

	public abstract void wash();

	public abstract void buyRice();
}

/*
 * 大学生雷锋
 */
class Undergraduate extends LeiFeng {

	@Override
	public void buyRice() {
		System.out.println("大学生帮老人买米.");
	}

	@Override
	public void sweep() {
		System.out.println("大学生帮老人洗衣服.");
	}

	@Override
	public void wash() {
		System.out.println("大学生帮老人扫地.");
	}
}

/*
 * 志愿者雷锋
 */
class Volunteer extends LeiFeng {

	@Override
	public void buyRice() {
		System.out.println("志愿者帮老人买米.");
	}

	@Override
	public void sweep() {
		System.out.println("志愿者帮老人洗衣服.");
	}

	@Override
	public void wash() {
		System.out.println("志愿者帮老人扫地.");
	}
}