Validating a string scanner

Question

I am creating an "add customer" method and I want to validate the "add forename" scanner so that only a string can be entered and if the user enters an int etc it will throw up an error, below is the code I have got so far. I have used "Harry" as an example, the concept seems to be working but obviously not every customer is going to be called Harry. Any help would be welcome!

boolean validInput12 = false;
            String userOption13 = "";
            do {
                System.out.println("Enter Customer Forename");
                if (sc2.hasNext()) {    
                    userOption13 = sc2.next();
                    if (userOption13.matches("Harry")) {
                        validInput12 = true;
                    sc2.nextLine();
                } else {
                    System.out.println("Input invalid: Please select a valid customer forename");
                }
            } else {
                System.out.print("Input invalid: Please enter a valid name \n");
                sc2.nextLine();
            }
        } while (!validInput12);

You will need to change 2 things. 1. Use `nextLine()` all the time and don't use `next()`. 2. use `yourString.matches("[a-zA-Z]+")` to ensure only characters are entered. This will ensure that your code works when people enter `Ron` or `Hermoine` :P — TheLostMind, Dec 10 '15 at 16:00
Possible duplicate of [Check if String contains only letters](http://stackoverflow.com/questions/5238491/check-if-string-contains-only-letters) — 3kings, Dec 10 '15 at 16:03
@MelissaWarrington - You will have to change your code a little. use `hasNextLine()` instead of next — TheLostMind, Dec 10 '15 at 16:04
Got it! if I wanted to add backslashes as well would it simply be ("[a-zA-Z /]+") ? @VinodMadyalkar — Melissa Warrington, Dec 10 '15 at 16:10
@MelissaWarrington - Yes, I think you'll probably need spaces as well? — TheLostMind, Dec 10 '15 at 16:12
Do you know how to do this for a double, such a currency? 5.00? — Melissa Warrington, Dec 10 '15 at 16:27

Validating a string scanner

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