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Java Java Objects Delivering the MVP Validating and Normalizing User Input

Posted by Miguel Nunez
Miguel Nunez
1,081 Points

Problem/bug

Given this 

public boolean promptForGuess() {
        Scanner s = new Scanner(System.in);
        boolean isHit = false;
        boolean isValidInput = false;

        do {
            System.out.print("Enter a letter: ");
            String input = s.nextLine();
            char letter = input.charAt(0);

            try {
                isHit = game.applyGuess(letter);
                isValidInput = true;
            } catch (IllegalArgumentException iae) {
                System.out.println(iae.getMessage());
            }
        } while (!isValidInput);

        return isHit;
    }

Because of this line of code, I believe

char letter = input.charAt(0);

If a pass to the constructor a word like this "Wrong".
Whether I type any of these "R, O, N, G" the toLowerCase() command will work. Not so with "W" if I type "w" it will count as a miss.

Miguel Nunez
Miguel Nunez
1,081 Points

Oh, it turns out that it only works if the passed answer is all in lower case

1 Answer

J llama
J llama
12,631 Points
J llama
J llama
12,631 Points

what a great job by treehouse here.....lets make a 13 min video