打印订单收据？

Question

我正在制作一个程序，允许用户从咖啡馆订购一些食物，然后打印食物的收据。我想在收据上打印订购的产品，只打印订购的产品，以及数量和价格*数量。我发现使用数组是我能以列表格式排序的唯一方法。问题是它显示的项目未按$ 0排序为空值。我希望它只显示订购的商品。此外，我无法弄清楚如何显示订购商品旁边的每件商品的数量。

产品类

import java.util.Scanner; //program uses class Scanner

    public void displayMenu() {
        System.out.printf("%-12s%12s%12s%n", "======", getBelliFreschiName(), "======");
        System.out.printf("%-12s%12s%14s%n", "1    ", getStarbucksName(), "    $" + getStarbucksPrice());
        System.out.printf("%-8s%12s%22s%n", "2    ", getTazoName(), "    $" + getTazoPrice());
        System.out.printf("%-12s%12s%16s%n", "3    ", getEinsteinName(), "    $" + getEinsteinPrice());
        System.out.printf("%-12s%12s%15s%n", "4    ", getKrusteazName(), "    $" + getKrusteazPrice());
        System.out.printf("%-12s%12s%12s%n", "======", "==================", "======");
    }

    public void orderProduct() {
        do {
            System.out.println("Please Enter A Product Number Between 1-4 or Press 0 to Exit");
            product = input.nextInt();

            if (product == 0) {
                break;
            }

            System.out.println("Please Enter Quantity");
            quantity = input.nextInt();

            switch (product) {
                case 1:
                    coffeePrice = 2.11;
                    subTotal += (2.11 * quantity);
                    selectedValue[1] = 2.11 * quantity;
                    nameProduct[1] = "Starbucks Coffee";
                    break;
                case 2:
                    teaPrice = 2.51;
                    subTotal += (2.51 * quantity);
                    selectedValue[2] = 2.51 * quantity;
                    nameProduct[2] = "Tazo Tea";
                    break;
                case 3:
                    bagelPrice = 3.14;
                    subTotal += (3.14 * quantity);
                    selectedValue[3] = 3.14 * quantity;
                    nameProduct[3] = "Einstein Bagel";
                    break;
                case 4:
                    muffinPrice = 3.54;
                    subTotal += (3.54 * quantity);
                    selectedValue[4] = 3.54 * quantity;
                    nameProduct[4] = "Krusteaz Muffin";
                    break;

                default:
                    System.out.println("Please enter a valid product No.");
            }
        }
        while (product != 0);
        for (int i = 1; i < 5; i++) {
            System.out.println(nameProduct[i] + " " + " $" + selectedValue[i]);
        }
        System.out.printf("%s%.2f", "\nSubtotal: $", subTotal);
        System.out.printf("%5s%.2f", "\nTax: $", (subTotal * tax));
        System.out.printf("%4s%.2f", "\nTotal: $", (subTotal + (subTotal * tax)));
    }
}