public class Test { public static void main(String[] args) { Factories.test(); } } /* 设计模式之禅中的工厂模式是这样的,先定义好工厂和产品的接口,实现各个产品, 产品无需为工厂编写任何代码。工厂通过传产品类的class对象来生成一个产品,这 其中用到了反射方面的东西,我觉着这中方案会更好一点。 案例中的方案,虽然利用接口降低了耦合,但是还是有点不太舒服 */ interface Service { void method1(); void method2(); } interface ServiceFactory { Service getService(); } class A implements Service { private A() { } @Override public void method1() { System.out.println("A method1"); } @Override public void method2() { System.out.println("A method2"); } public static ServiceFactory factory = new ServiceFactory() { @Override public Service getService() { return new A(); } }; } class B implements Service { private B() { } @Override public void method1() { System.out.println("B method1"); } @Override public void method2() { System.out.println("B method2"); } public static ServiceFactory factory = new ServiceFactory() { @Override public Service getService() { return new B(); } }; } class Factories{ public static void serviceConsumer(ServiceFactory factory) { Service s = factory.getService(); s.method1(); s.method2(); } public static void test() { serviceConsumer(A.factory); serviceConsumer(B.factory); } }
public class Test { public static void main(String[] args) { Games.test(); } } interface Game { boolean move(); } interface GameFactory { Game getGame(); } class Checkers implements Game{ private Checkers() {}; private int moves = 0; private static final int MOVES = 5; @Override public boolean move() { System.out.println("Checkers move " + move()); return ++moves != MOVES; } public static GameFactory factory = new GameFactory() { @Override public Game getGame() { return new Checkers(); } }; } class Chess implements Game { private Chess() { } private int moves = 0; private static final int MOVES = 4; @Override public boolean move() { System.out.println("Chess move "+moves); return ++moves != MOVES; } public static GameFactory factory = new GameFactory() { @Override public Game getGame() { return new Chess(); } }; } public class Games { public static void playGame(GameFactory factory) { Game s = factory.getGame(); while (s.move()) { } } public static void test() { playGame(Checkers.factory); playGame(Chess.factory); } }