为什么我在使用此联机ide for java时出现以下错误：https://www.compilejava.net/

下面是一个简单程序的错误，该程序获取一个磅值并以Kg的形式返回：

Enter a pound value:
    Exception in thread "main" java.util.NoSuchElementException
        at java.util.Scanner.throwFor(Scanner.java:862)
        at java.util.Scanner.next(Scanner.java:1485)
        at java.util.Scanner.nextDouble(Scanner.java:2413)
        at returnType2.main(returnType2.java:12)

下面是代码：

import java.util.Scanner;

      public static void main (String args[]) throws Exception 
      {
        Scanner myScanner = new Scanner(System.in);

        double pound, kg;
        System.out.println("Enter a pound value:");
        pound = myScanner.nextDouble();
        kg = convertToKg (pound);
        System.out.println("In kilograms:");
        System.out.println(kg);
      }

        public static double convertToKg (double num)
        {
          double kg;
          kg = (num * 2.2);
          return kg;
        }

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您没有提供所需的输入。当您没有向代码提供所需的输入并尝试执行它时，在OnlineIDEs中会出现此错误。给出上传代码的链接。重复-