设计模式之外观(facade)

public class Facade {

	class Engine{
		public void run(){
			System.out.println("engine is run...");
		}
		public void stop(){
			System.out.println("engine is stop...");
		}
	}
	class Wheel{
		public void run(){
			System.out.println("wheel is run...");
		}
		public void stop(){
			System.out.println("wheel is stop...");
		}
	}
	//向外提供一个接口
	class CarFacade{
		Engine engine = new Engine();
		Wheel wheel = new Wheel();
		public void carRun(){
			engine.run();
			wheel.run();
		}
		public void carStop(){
			engine.stop();
			engine.run();
		}
	}
	public static void main(String[] args) {
		Facade facade = new Facade();
		CarFacade car = facade.new CarFacade();
		car.carRun();
		car.carStop();
	}
}