try and catch statements

[vendetta]

right now with the code below, I can enter in a negative quantity and the try statement will succeed. If I enter in letters for numbers, for example, the try statement won't succeed, and the catch statement will be displayed. I also want to make the try statement not to succeed and the catch statement to trigger if I enter in a negative quantity. any idea how to do this?

 try{
            // create Scanner to read keyboard
           Scanner sc = new Scanner( System.in );
           
           // get title
           System.out.print("Enter title: ");
           String t = sc.nextLine();
           
           // get quantity
           System.out.print("Enter quantity: ");
           int q = sc.nextInt();
}

   catch( InputMismatchException e ){
            System.out.println( "Input error... try again!" );
        }

[gcalvin]

           int q = sc.nextInt();
           if (q < 0) throw new InputMismatchException();

Can't say I like the style much, though.

-Gary-

[Eranga]

Yes Gary, I don't like that way too. But it's easiest way, than validating and looping conditions again and again, isn't it?

[vendetta]

Thank you for the help :)

[Eranga]

You are welcome, and thanks for marking the thread solved. :)