FACTORY—追MM少不了请吃饭了，麦当劳的鸡翅和肯德基的鸡翅都是MM爱吃的东西，虽然口
味有所不同，但不管你带MM去麦当劳或肯德基，只管向服务员说“来四个鸡翅”就行了。
麦当劳和肯德基就是生产鸡翅的Factory
下面是我写的一个代码For Factory
//鸡翅膀基类(ChickenWing.java)
public abstract class ChickenWing
{
}
//麦当劳鸡翅膀子类(McChickenWing.java)
public class McChickenWing extends ChickenWing
{
}
//KFC鸡翅膀子类（KfcChickenWing.java)
public class KfcChickenWing extends ChickenWing
{
}
//麦当劳工厂
public class McFactory
{
public ChickenWing getChickenWing()
{
System.out.println("This is a Mcdonalds ChickenWing!");
return new McChickenWing();
}
}
//KFC工厂
public class KfcFactory
{
public ChickenWing getChickenWing()
{
System.out.println("This is a KFC ChickenWing!");
return new KfcChickenWing();
}
}
//测试java文件
public abstract class Test
{
public static void main(String[] args)
{
//new a Mc Factory
McFactory objMcFactory=new McFactory();
//new a Kfc Factory
KfcFactory objKfcFactory=new KfcFactory();
//if you and PLMM in Mcdonalds,she want to eat ChickenWing
System.out.println("You and PLMM in Mcdonalds,She Want to eat ChickenWing.
...");
System.out.print("ChickenWing have be sent to you: ");
objMcFactory.getChickenWing();
//if you and PLMM in KFC,she want to eat ChickenWing
System.out.println("You and PLMM in KFC,She Want to eat ChickenWing....");
System.out.print("ChickenWing have be sent to you: ");
objKfcFactory.getChickenWing();
}
}
输出结果：
You and PLMM in Mcdonalds,She Want to eat ChickenWing....
ChickenWing have be sent to you: This is a Mcdonalds ChickenWing!
You and PLMM in KFC,She Want to eat ChickenWing....
ChickenWing have be sent to you: This is a KFC ChickenWing!
工厂模式：客户类和工厂类分开。消费者任何时候需要某种产品，只需向工厂请求即可。
消费者无须修改就可以接纳新产品。缺点是当产品修改时，工厂类也要做相应的修改。如
：如何创建及如何向客户端提供
所以如果plmm要吃可乐或者薯条的话，除了客户端不变以外，工厂+产品都要变化，
不过这比硬编码好很多。。。
以后争取把所有追plmm的设计模式用代码写出来。。