设计模式（五） | 外观模式：牛市股票还会亏钱？

public class SubSystemOne {
            public void MethodOne(){
                System.out.println("子系统方法一");
            }
        }
        public class SubSystemTwo {
            public void MethodTwo(){
                System.out.println("子系统方法二");
            }
        }
        public class SubSystemThree {
            public void MethodThree(){
                System.out.println("子系统方法三");
            }
        }
        public class Facade {
            SubSystemOne one;
            SubSystemTwo two;
            SubSystemThree three;
            public Facade() {
                one = new SubSystemOne();
                two = new SubSystemTwo();
                three = new SubSystemThree();
            }
            public void MethodA(){
                System.out.println("方法组A（）");
                one.MethodOne();
                two.MethodTwo();
            }
            public void MethodB(){
                System.out.println("方法组B（）");
                two.MethodTwo();
                three.MethodThree();
            }
        }
        public class Client {
            public static void main(String[] args) {
                Facade facade = new Facade();
                facade.MethodA();
                facade.MethodB();
            }
        }