如何使用扫描仪创建一个总结用户输入的方法？

Question

我想创建一种方法，可以总计总价并创建收据作为示例：

product : price € (user input)
product : price € (user input)
-------------------
Total €..

这是我的代码。

public static void main(String[] args) {

    Scanner invoer = new Scanner(System.in);

    System.out.print("Wat is is het kortingsaantal(1...9)? ");
    int kortingsaantal = invoer.nextInt();

    System.out.print("Wat is het kortingspercentage (1...100)? ");
    int kortingspercentage = invoer.nextInt();

    System.out.print("Hoeveel artikelen heb je gekocht? ");
    int quantity = invoer.nextInt();

    for (int i = 1; i <= quantity; i++) {

        System.out.print("Omschrijving van artikel #" + i + ": ");
        String dummy = invoer.nextLine();
        String product = invoer.nextLine();


        System.out.print("   Prijs van " + product + ":");
        double Price = invoer.nextDouble();