java内部类学习（另一种工厂模式）

通过内部类实现工厂模式。

//Service接口
interface Service {
	void method1();
	void method2();
}
//创建Service的工厂接口
interface ServiceFactory {
	Service getService();
}
//Service实现
class Implementation1 implements Service {
	private Implementation1() {
	}

	public void method1() {
		System.out.println("implements1 method1");
	}

	public void method2() {
		System.out.println("implements1 method2");
	};
	//自己包含工厂
	public static ServiceFactory factory = new ServiceFactory(){
		public Service getService(){
			return new Implementation1();
		}
	};

}

class Implementation2 implements Service {
	private Implementation2() {
	}

	public void method1() {
		System.out.println("implements2 method1");
	}

	public void method2() {
		System.out.println("implements2 method2");
	};
	
	public static ServiceFactory factory = new ServiceFactory(){
		public Service getService(){
			return new Implementation2();
		}
	};
}

class Factories {
	public static void serviceConsumer(ServiceFactory fact) {
		Service s = fact.getService();
		s.method1();
		s.method1();
	}

	public static void main(String[] args){
		serviceConsumer(Implementation1.factory);
		serviceConsumer(Implementation2.factory);
	}
}