设计模式——外观模式

public class ThinkPad {
    public void on(){
        System.out.println("ThinkPad is on!");
    }

    public void off(){
        System.out.println("ThinkPad is off!");
    }
}

public class Light {
    public void on(){
        System.out.println("Light is on!");
    }

    public void off(){
        System.out.println("Light is off!");
    }
}

public class Website {
    public void open(){
        System.out.println("bilibili is open!");
    }

    public void close(){
        System.out.println("bilibili is close!");
    }
}

public interface ACGWatchFacade {
    void ACGWatch(String video);
    void ACGWatchFinish();
}

public class WatchMovieServiceImpl implements ACGWatchFacade {

    private ThinkPad thinkPad;
    private Light light;
    private Website website;

    public WatchMovieServiceImpl(){
        thinkPad = new ThinkPad();
        light = new Light();
        website = new Website();
    }


    @Override
    public void ACGWatch(String video){
        System.out.println("Get ready to watch a ACG video...");
        thinkPad.on();
        website.open();
        light.off();
    }

    @Override
    public void ACGWatchFinish(){
        System.out.println("Get ready to close a ACG video...");
        light.on();
        website.close();
        thinkPad.off();
    }
}

public class Client {
    public static void main(String[] args) {
        //客户端只知道facade
        ACGWatchFacade facade = new WatchMovieServiceImpl();
        facade.ACGWatch("LOL");
        facade.ACGWatchFinish();
    }
}