java中的工厂模式

 接口：

package day03;

public interface Miaotiao {
	void makeMiaotiao();
}

三个实现类：

package day03;

public class LazhouMiaotiao implements Miaotiao{

	@Override
	public void makeMiaotiao() {
		System.out.println("做了一碗兰州拉面");
	}

}

package day03;

public class ChenMian implements Miaotiao{

	@Override
	public void makeMiaotiao() {
		System.out.println("做了一碗抻面");
	}

}

package day03;

public class ShouganMian implements Miaotiao {

	@Override
	public void makeMiaotiao() {
		System.out.println("做了一碗手擀面");
	}

}

生产面条的工厂（面馆）

package day03;

public class MianGuanFactory {
	public final static int lanzhouMian = 1;
	public  final static int chenMian = 2;
	public final static int shouGanMian = 3;
	
	public static Miaotiao makeMian(int type) {
		Miaotiao miantiao = null;
		switch (type) {
		case 1:
			miantiao = new LazhouMiaotiao();
			break;
		case 2:
			miantiao = new ChenMian();
			break;
		case 3:
			miantiao = new ShouganMian();
			break;
		}
		
		return miantiao;
	}
}

运行测试类：

package day03;

public class Yunxing {
	public static void main(String[] args) {
		Miaotiao makeMian = MianGuanFactory.makeMian(MianGuanFactory.chenMian);
		makeMian.makeMiaotiao();
		
	}
}