Java: How do I ensure, or make a user, input a comma in a string?
<p>First off, I am brand new to both Java and to this website. I am going to ask my question as thoroughly as I can. However, please let me know if you think I left something out. </p>

<p>I am working on a school assignment, and I am stuck on the second portion of it. I am able to prompt the user, but can not for the life of me, figure out how to ensure that the input string contains a comma. I did try searching this site, as well as Googling it, and haven't been able to find anything. Perhaps I am not wording the question appropriately. </p>

<p>(1) Prompt the user for a string that contains two strings separated by a comma.
(2) Report an error if the input string does not contain a comma. Continue to prompt until a valid string is entered. Note: If the input contains a comma, then assume that the input also contains two strings.</p>

<p>So far I have this:</p>

<pre><code>public static void main(String[] args) {

    Scanner scnr = new Scanner(System.in); // Input stream for standard input
    Scanner inSS = null;                   // Input string stream
    String lineString = "";                // Holds line of text
    String firstWord = "";                 // First name
    String secondWord = "";                  // Last name
    boolean inputDone = false;             // Flag to indicate next iteration

    // Prompt user for input
    System.out.println("Enter string seperated by a comma: ");

    // Grab data as long as "Exit" is not entered
    while (!inputDone) {

        // Entire line into lineString
        lineString = scnr.nextLine();

        // Create new input string stream
        inSS = new Scanner(lineString);

        // Now process the line
        firstWord = inSS.next();

        // Output parsed values
        if (firstWord.equals("q")) {
            System.out.println("Exiting.");

            inputDone = true;

        if else (lineString != ",") {     // This is where I am stuck!
            System.out.print("No comma in string");
        }
        } else {
            secondWord = inSS.next();


            System.out.println("First word: " + firstWord);
            System.out.println("Second word: " + secondWord);

            System.out.println();
        }
    }

    return;
}
</code></pre>

<p>}</p>

<p>I know my "if else" is probably not correct. I just don't know where to begin for this particular command. Unfortunately my eBook chapter did not cover this specifically. Any thoughts would be greatly appreciated. Thank you so much!</p>