05-05-设计模式 外观模式

package com.flower.waiguan;

public class TestMain {
    public static void main(String[] args) {
        HomeYouFacade homeYouFacade = HomeYouFacade.homeYouFacade;
        homeYouFacade.start();
        homeYouFacade.stop();
    }
}
abstract class OnAndOff{
    protected String deviceName;

    public OnAndOff(String deviceName) {
        this.deviceName = deviceName;
    }
    public void on(){
        System.out.println(deviceName + " on");
    }
    public void off(){
        System.out.println(deviceName + " off");
    }
}
class DVDPlayer extends OnAndOff{
    public static final DVDPlayer dvdPlayer = new DVDPlayer();
    public DVDPlayer() {
        super("dvd");
    }
}
class Popcorn extends OnAndOff{
    public static final Popcorn popcorn = new Popcorn();
    public Popcorn() {
        super("popcorn");
    }
}
class Projector extends OnAndOff{
    public static final Projector projector = new Projector();
    public Projector() {
        super("projector");
    }
}
class Screen extends OnAndOff{
    public static final Screen screen = new Screen();
    public Screen() {
        super("screen");
    }
}
class HomeYouFacade{
    public static final HomeYouFacade homeYouFacade = new HomeYouFacade();
    // 组合设备
    private static final DVDPlayer dvdPlayer = DVDPlayer.dvdPlayer;
    private static final Popcorn popcorn = Popcorn.popcorn;
    private static final Projector projector = Projector.projector;
    private static final Screen screen = Screen.screen;
    public void start(){
        dvdPlayer.on();
        popcorn.on();
        projector.on();
        screen.on();
    }
    public void stop(){
        dvdPlayer.off();
        popcorn.off();
        projector.off();
        screen.off();
    }
}