牛市股票还是亏钱—外观模式

class SubSystemOne{
    public void MethodOne(){
        //子系统方法一
    }
}

class SubSystemTwo(){
    public void MethodTwo(){
        //子系统方法二
    }
}

class SubSystemThree(){
    public void MethodThree(){
        //子系统方法三
    }
}

class SubSystemFour(){
    public void MethodFour(){
        //子系统方法四
    }
}

class Facade{
    SubSystemOne one;
    subSystemTwo two;
    subSystemThree three;
    SubSystemFour four;
    
    public Facade{
        one = new SubSystemOne();
        two = new SubSystemTwo();
        three = new SubSystemThree();
        four = new SubSystemFour();
    }
    
    public void MethodA(){
        //方法组A
        one.MethodOne();
        two.MethodTwo();
        four.MethodFour();
    }
    
    public void MethodB(){
        //方法组B
        two.MethodTwo();
        three.MethodTwo();
    }
    
}

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