股票管理人外观模式实现

public class Stock1 {
    public void Buy(){
        System.out.println("股票一买入");
    }
    public void Sell(){
        System.out.println("股票一卖出");
    }
}
public class Stock2 {
    public void Buy(){
        System.out.println("股票二买入");
    }
    public void Sell(){
        System.out.println("股票二卖出");
    }
}
public class Stock3 {
    public void Buy(){
        System.out.println("股票三买入");
    }
    public void Sell(){
        System.out.println("股票三卖出");
    }
}
public class Fund {
    Stock1 stock1;
    Stock2 stock2;
    Stock3 stock3;
    public  Fund(){
        stock1 = new Stock1();
        stock2 = new Stock2();
        stock3 = new Stock3();
    }
    public void Buy(){
        stock1.Buy();
        stock2.Buy();
        stock3.Buy();
    }
    public void Sell(){
        stock1.Sell();
        stock2.Sell();
        stock3.Sell();
    }
}
public class Test {
        public static void main(String[] args) {
            Fund fund = new Fund();
            fund.Buy();
            fund.Sell();
        }
}