设计模式-内部类工厂模式

public interface Service {
	void method1();
	void method2();
}

public interface ServiceFactory {
	Service getService();
}

public class Implementation1 implements Service {

	@Override
	public void method1() {
	}

	@Override
	public void method2() {
	}

	public static ServiceFactory factory = 
			new ServiceFactory() {
				@Override
				public Service getService() {
					return new Implementation1();
				}
	};
}

public class Implementation2 implements Service {

	@Override
	public void method1() {
	}

	@Override
	public void method2() {
	}

	public static ServiceFactory factory = 
			new ServiceFactory() {
				@Override
				public Service getService() {
					// TODO Auto-generated method stub
					return new Implementation2();
				}
	};
}

public class Factories {
	
	public static void serviceConsumer(ServiceFactory factory) {
		Service s = factory.getService();
		s.method1();
		s.method2();
	}
	
	public static void main(String[] args) {
		serviceConsumer(Implementation1.factory);
		serviceConsumer(Implementation2.factory);
	}

}