为什么来自Scanner方法的nextDouble()向我发送"Exception"消息? [英] Why is nextDouble() from the Scanner method sending me "Exception"

问题描述

我假设输入2个数字，一个int表示要提取的金额，一个double表示余额(两个之间有一个空格).由于每次提款均收取0.5的手续费，因此余额必须加倍.那就是必须打印的内容. 我在nextDouble上收到错误，为什么?我只有1个月的编码，我认为这将是小菜一碟，我认为30年前BASIC语法毁了我:(

I'm suppose to enter 2 numbers, one int that is the amount to withdraw and one double which is the balance (with a space between them). Since every withdraw charges a fee of 0.5, balance must be a double. And thats what must be printed. I get error at nextDouble, why? I have just 1 month coding, I thought this was going to be a piece of cake, I think BASIC syntax ruined me 30 years ago :(

import java.util.Scanner;

public class Test {

public static void main(String[] args) {
    //init variables
    int amount;
    double balance;
    //insert amount and balance
    Scanner input = new Scanner (System.in);
    amount = input.nextInt();
    balance = input.nextDouble();
    //reduce amount+fee from balance
    balance=balance-(amount + 0.50);
    //print new balance
    System.out.print(balance);
    input.close();
}
}

推荐答案

它取决于语言环境，请尝试使用逗号而不是点，反之亦然.

It is dependant on Locale, try to use comma instead of a dot or vice versa.

例如: 1,5 ，而不是 1.5

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