java - Netbeans-NoSuchElementException

Question

代码在 Gitbash 命令行 (GitHub) 中正确运行。但是，当我在 NetBeans 中编译并运行它时，它给出了 NoSuchElement Exception。如果有人可以帮助我使用 NetBeans，我将不胜感激。

     package MyApp;

     import java.util.Scanner;

     public class MyApp {
     /** 
     * Starts the program 
     * 
     * @param args command line arguments 
     */
     public static void main(String[] args) {
        // welcome the user to MyApp
        System.out.println("Welcome to MyApp");
        System.out.println();  // print a blank line

        // create a Scanner object named sc
        Scanner sc = new Scanner(System.in);

        // check if the number you enter is even or odd until choice isn't
        equal to "y" or "Y"
        String choice = "y";
        while (choice.equalsIgnoreCase("y")) {
            // get the integer from the user
            System.out.print("Enter an integer:   ");
            double integer = sc.nextDouble();

            // check whether it is even or odd
            if (integer % 2 == 0) {
              System.out.println("It is an even integer");
            } else {
                System.out.println("It is an odd integer");  ;
            }

            // see if the user wants to continue
            System.out.print("Continue? (y/n): ");
            choice = sc.next();
            System.out.println(); 
        }
    }
}

Answer 1

我运行了该代码，它运行得很好!我唯一改变的是线路

    //check if number you entered is even or odd until choice isnt 
    equal to "y" or "Y"

我将其更改为:

    //check if number you entered is even or odd until choice isnt 
    //equal to "y" or "Y"

虽然有时扫描仪会卡在前一个字符上，所以您可以尝试使用 sc.nextLine(); 这样它就会转到下一行并获取新行字符。