public boolean checkForDiagonalStrike(String input) {
        int i;
        for (i = 0; i < getBoardSize(); i++) {
            if (boardArray[i][i].equalsIgnoreCase(input)) {
                continue;
            }
            break;
        }
        if (i == getBoardSize()){
            setWinner(input);
            return true;
        }

        for (i = 0; i < getBoardSize(); i++) {
            if (boardArray[i][getBoardSize() - i - 1].equalsIgnoreCase(input)) {
                continue;
            }
            break;
        }

        if(i == getBoardSize()){
            setWinner(input);
            return true;
        }

        return false;
    }