java - 如何获得循环内每个商品的总销售成本？

Question

在此 while 循环内，有 4 个项目可供选择。咖啡 (1)、拿铁 (2)、卡布奇诺 (3) 和浓缩咖啡 (4)。模拟会选取一堆随机数来填写每个客户的订单和数量，然后计算每个客户的总成本。现在我必须在 while 循环之后制作销售报告，并且必须计算每个项目的销售总额。由于数字是随机的并且循环会根据客户数量自行重复，我该如何做到这一点？

while (CustomersSimulated <= MaxCustomersSimulated)
        {   
                    //customer number
        System.out.println("Customer " + CustomersSimulated);    


                //one random item for each customer     
    Random RandomList = new Random();
    int RandomItem = RandomList.nextInt(4) + 1;   

    if (RandomItem == 1)
        {
        System.out.println("Item purchased: Coffee");
        final double CoffeePrice = 1.50;

                          //random quantity for the item        
        Random RandomListTwo = new Random();    
        int RandomQuantity = RandomListTwo.nextInt(5) + 1;
        System.out.println("Quantity purchased: " + RandomQuantity);

                          //total cost for the one customer     
        double TotalCoffeeCost = RandomQuantity * CoffeePrice;  
        System.out.println("Total Cost: $" + NumberFormat.format(TotalCoffeeCost)); 
        }
    else if (RandomItem == 2)
        {
        System.out.println("Item purchased: Latte");
        final double LattePrice = 3.50;

        Random RandomListTwo = new Random();
        int RandomQuantity = RandomListTwo.nextInt(5) + 1;
        System.out.println("Quantity purchased: " + RandomQuantity);

        double TotalLatteCost = RandomQuantity * LattePrice; 
        System.out.println("Total Cost: $" + NumberFormat.format(TotalLatteCost));
        }
    else if (RandomItem == 3)
        {
        System.out.println("Item purchased: Cappuccino");
        final double CappuccinoPrice = 3.25;

        Random RandomListTwo = new Random();
        int RandomQuantity = RandomListTwo.nextInt(5) + 1;
        System.out.println("Quantity purchased: " + RandomQuantity);

        double TotalCappuccinoCost = RandomQuantity * CappuccinoPrice; 
        System.out.println("Total Cost: $" + NumberFormat.format(TotalCappuccinoCost));
        }
    else if (RandomItem == 4)
        {
        System.out.println("Item purchased: Espresso");
        final double EspressoPrice = 2.00;

        Random RandomListTwo = new Random();
        int RandomQuantity = RandomListTwo.nextInt(5) + 1;
        System.out.println("Quantity purchased: " + RandomQuantity);

        double TotalEspressoCost = RandomQuantity * EspressoPrice; 
        System.out.println("Total Cost: $" + NumberFormat.format(TotalEspressoCost));
        }

    System.out.println(" ");

    CustomersSimulated++;
    }

Answer 1

我能想到的唯一方法是创建四个不同的计数器并通过每次添加来存储每个销售。