Façade Design Pattern

Façade means "Frontage" or "face" . Face of the multiple subsystem .

/**
 * SmartPerson(Client).
 */
public class SmartPerson {
    private SmartHomeSystem homeSystem = new SmartHomeSystem();

    public void myMovieSetup() {
        homeSystem.movieNightSetup();
    }
}


/**
 * SmartHomeSystem(Facade).
 */
public class SmartHomeSystem {

    private SmartLight light = new SmartLight();
    private SmartWindow window = new SmartWindow();
    private SmartAC ac = new SmartAC();
    private SmartMovieSystem moviesys = new SmartMovieSystem();

    public void movieNightSetup() {
        System.out.println("Movie Night Set up flow started ");
        window.close();
        ac.on();
        moviesys.movieTVSetup();
        light.off();
        System.out.println("Movie Night Set up - Successfully ");
    }
}

/**
 * SmartLight(SubSytem Class).
 */
public class SmartLight {

    public void on() {
        System.out.println("Light On");
    }
    public void off() {
        System.out.println("Light off");
    }
}

/**
 * SmartAC(SubSytem Class).
 */
public class SmartAC {

    public void on() {
        System.out.println("AC On");
    }
    public void off() {
        System.out.println("AC off");
    }
}
/**
 * SmartTV(SubSytem Class).
 */
public class SmartTV {
    public void on() {
        System.out.println("TV On");
    }
    public void off() {
        System.out.println("TV off");
    }

    public void playmovie() {
        System.out.println("Palying the movie");
    }
}
/**
 * SmartWindow(SubSytem Class).
 */
public class SmartWindow {

    public void close() {
        System.out.println("Window Close");
    }
    public void open() {
        System.out.println("Window Open");
    }
}
/**
 * SmartSpeaker(SubSytem Class).
 */
public class SmartSpeaker {

    public void highVolume() {
        System.out.println("Speaker high Volume");
    }
    public void mediumVolume() {
        System.out.println("Speaker medium Volume");
    }
    public void lowVolume() {
        System.out.println("Speaker low Volume");
    }
}

/**
 * SmartMovieSystem(AdditionalFacade)(optional).
 */
public class SmartMovieSystem {
    private SmartTV tv = new SmartTV();
    private SmartSpeaker speaker = new SmartSpeaker();

    public void movieTVSetup() {
        System.out.println("Movie TV Set up flow started ");
        tv.on();
        speaker.highVolume();
        tv.playmovie();
        System.out.println("Movie TV Set up - Successfully ");
    }
}

public class PatternTest {

    public static void main(String[] args) throws Exception {
        SmartPerson person = new SmartPerson();
        person.myMovieSetup();
    }
}

// output
Movie Night Set up flow started 
Window Close
AC On
Movie TV Set up flow started 
TV On
Speaker high Volume
Palying the movie
Movie TV Set up - Successfully 
Light off
Movie Night Set up - Successfully