简单工厂模式

简单工厂模式 缺点: 不符合开闭原则 工厂类 public class SimpleCarFactory { public static T extends Car T createCar(Class T c) { Car car = null; try { car = (Car) Class.forName(c.getName()).newInstance(); } catch (Exception e) { // Handle exception... } return (T) car; } } 客户端代码 private static void testSimpleFactory() { Car audi = SimpleCarFactory.createCar(Audi.class); audi.showDes(); audi.start(); audi.showCurrentSpeed(); audi.stop(); Car bmw = SimpleCarFactory.createCar(BMW.class); bmw.showDes(); bmw.start(); bmw.showCurrentSpeed(); bmw.stop(); Car benz = SimpleCarFactory.createCar(Benz.class); benz.showDes(); benz.start(); benz.showCurrentSpeed(); benz.stop(); } 运行结果: 引用 I'm Audi Audi started... 180 Audi stoped... I'm BMW BMW started... 200 BMW stoped... I'm Benz Benz started... 210 Benz stoped...