从字符串收集输入时出错

Question

Java的新手，学习如何从字符串中收集用户输入。 假定该代码接受用户输入的两个单词，然后将其除以第一个单词和第二个单词。我反复收到错误消息：输入输入字符串：线程“ main” java.util.NoSuchElementException 中的异常，我对此并不了解...

  //Initializations
  Scanner scnr = new Scanner(System.in);
  String inputString = "";
  int commaPlacement = 0;

  String firstWord = "";
  String secondWord = "";

  //Collect user input
  System.out.print("Enter input string: ");
  inputString = scnr.next();
  commaPlacement = inputString.indexOf(",");


  //Create while loop
  while( (!inputString.equals("q")) ) {

     //Recollect input string if there is no comma
     if( (commaPlacement < 0) ) {
        System.out.println("Error: No comma in string");
        System.out.print("Enter input string: ");
        inputString = scnr.next();
     }

     //Continue if there is a comma in input string
     if( (commaPlacement >= 0) ) {
        Scanner inSS = new Scanner(inputString);
        firstWord = inSS.next();
        secondWord = inSS.next();
        System.out.println("First word: " + firstWord);
        System.out.println("Second word: " + secondWord);

        //Collect user input again
        System.out.print("Enter input string: ");
        inputString = scnr.next();
     }

  return;
  }

有人可以提供帮助吗？ 预先谢谢你。