外观模式

package com.chengjie;

class SystemLight {
    public void on() {
        System.out.println("灯打开了！");
    }

    public void off() {
        System.out.println("灯关闭了！");
    }
}

class SystemTelevision {
    public void on() {
        System.out.println("电视打开了！");
    }

    public void off() {
        System.out.println("电视关闭了！");
    }
}

class SystemAircontion {
    public void on() {
        System.out.println("空调打开了！");
    }

    public void off() {
        System.out.println("空调关闭了！");
    }
}

class Facade {
    SystemLight sl;
    SystemTelevision st;
    SystemAircontion sa;

    public Facade(SystemLight sl, SystemTelevision st, SystemAircontion sa) {
        this.sl = sl;
        this.st = st;
        this.sa = sa;
    }

    public void on() {
        System.out.println("起床了！");
        this.sl.on();
        this.st.on();
        this.sa.on();
    }

    public void off() {
        System.out.println("睡觉了！");
        this.sl.off();
        this.st.off();
        this.sa.off();
    }
}

public class TestFacadePattern {
    public static void main(String[] args) {
        Facade f = new Facade(new SystemLight(), new SystemTelevision(), new SystemAircontion());
        f.on();
        f.off();
    }
}