创建没有ArrayList字符串

Question

我的作业要求我创建产品目录。显然，我不允许在任何地方使用ArrayList字符串。我必须在＆＃34;构建目录＆＃34;中专门使用A String。如果它是目录的一部分，将返回用户输入的产品的随机价格的方法。任何人都知道如何在不使用数组列表的情况下创建此目录，而只使用字符串？我的代码在下面工作，但不是只有一个字符串...谢谢！

public static void main(String[] args) {
    bannerPrinter();
    ArrayList<String> products = productsBuilder();
    Boolean productExists = getOrder(products);
    if (productExists) {
        double price = getPrice();
        double tax = getTax(price * .10);
        double saleTotal = tax + price;
        printTotal(saleTotal);
    } else {
        System.out.println("Product not found.");
    }

}

public static void bannerPrinter() {

    System.out.println("******************************************");
    System.out.println("====== Welcome to my eCommerce app! ======");
    System.out.println("******************************************");
    System.out.println();

}

public static ArrayList<String> productsBuilder() {
    ArrayList<String> productsCatalog = new ArrayList<String>();
    productsCatalog.add("Headphones");
    productsCatalog.add("Glue Stick");
    productsCatalog.add("Calculator");

    return productsCatalog;
}

public static boolean getOrder(ArrayList<String> products) {
    Scanner in = new Scanner(System.in);
    String userProduct = "";
    System.out.print("Please enter a product name: ");
    userProduct = in.nextLine();
    boolean productName = products.contains(userProduct);

    if (productName) {
        System.out.println("True");
    } else {
        System.out.println("False");
    }
    return productName;
}

public static double getPrice() {
    double price = 0.0;
    price = (Math.random()) * 10;

    return price;
}

public static double getTax(double price) {
    double tax = 0.0;
    tax = price * .10;
    return tax;
}

public static double getTotal(double price, double tax) {
    double saleTotal = 0.0;
    saleTotal = price + tax;
    return saleTotal;
}

public static void printTotal(double saleTotal) {
    System.out.printf("Your sale total is $%.2f", saleTotal);
    System.out.println("");

}

}