While loop that is not working with Try/Catch statements

Question

Im trying to give the user the opportunity to repeat an input after introducing something that has produced an error but something is not working because once the err i

Answer 1

When you enter a non-integer the Scanner call to nextInt() doesn't consume the non-integer. You need to call keyboard.next() (or keyboard.nextLine()) to consume it. Something like,

try {
    dim = keyboard.nextInt();
} catch (Exception e) {
    System.out.printf("%s is not an integer.%n", keyboard.next());
    err = 1;
}