小编Isa*_*lle的帖子

运行程序时,我收到以下错误:

输入数字:5原始编号为5.0 错误输入不是数字.

我尝试了所有我能想到的东西,但我很难过.以下是代码段,

import java.util.Scanner;

public class NegativeNumberConversion {

    public static void main(String[] args) {
        // Convert negative numbers to positive and display back to user

        // Create a console object for Scanner class
        Scanner input = new Scanner (System.in);

        // Declare variable
        double numberOne = 0;

        // Prompt user to enter number
        System.out.println("Enter a number: ");

        // Read in the number
        numberOne = input.nextDouble();

        // If the number is positive - display it
        if (numberOne > 0){ …