Question

I have found how to validate that an input is a number using try/catch but how do I go about validating that a user input is alphabetical only and contains no numbers?

Answer 1

You could use a simple regular expression:

if (str.matches("[a-zA-Z]+$")) {
   // str consists entirely of letters
}

Note that this only works with letters A-Z and a-z. If you need to properly support Unicode, a better method is to loop over the characters of the string and use Character.isLetter().