Java结构型模式之门面模式详解

class Facade {
    private SubSystem1 subSystem1 = new SubSystem1();
    private SubSystem2 subSystem2 = new SubSystem2();
    private SubSystem3 subSystem3 = new SubSystem3();
    public void doSomething(){
        subSystem1.operation1();
        subSystem2.operation2();
        subSystem3.operation3();
    }
}
class SubSystem1 {
    void operation1(){}
}
class SubSystem2 {
    void operation2(){}
}
class SubSystem3 {
    void operation3(){}
}

public class Client {
    private static Facade facade = new Facade();
    public static void main(String[] args) {
        facade.doSomething();
    }
}