小编A A*_*len的帖子

我需要能够接受用户输入,直到输入大于初始价格,但我还需要使其健壮,以便用户不能通过输入除double/integer之外的其他内容来破坏程序.如果用户输入的内容不是double/int.

问题是它创建了一个循环并重复"请输入有效货币"+"请输入:价格"

 public static double findChange()
{
    System.out.println("\nPlease insert: " + price + " (enter payment amount)");
    initialPrice = price;
    while (payment < price)
    {  
        try{
            payment = kb.nextDouble();
        }
        catch (Exception e)
        {
            System.out.println("Please enter valid currency");
        }
        if (payment > 0){
            totalPayment += payment;
            price -= payment;
            price = (price * 100);
            payment = 0;
        }
        if (totalPayment < initialPrice)
            System.out.println("Please Insert:" + price);
    }

    change = totalPayment - initialPrice;
    change = Math.round(change * 100);
    change = change …