how to end a while loop with a certain variable

Question

I am making an odd or even program with a while loop. I am trying to figure out how to end the while loop with a certain number. Right now I have 1 to continue the loop, and

Answer 1

To exit the program when the user enters anything other than a Number, change the variable x type to a String

if (!StringUtils.isNumeric(x)) {
    System.exit(0);
}

To exit the program when user enters 2

if (x == 2) {
    System.exit(0);
}