public static int fromBase26(String number) {
    int s = 0;
    if (number != null && number.length() > 0) {
        s = (number.charAt(0) - 'A');
        for (int i = 1; i < number.length(); i++) {
            s *= 26;
            s += (number.charAt(i) - 'A');
        }
    }
    return s;
}