NumberUtils.isNumber(String) is not right when the String is "1.1L"

            if (chars[i] == 'l'
                || chars[i] == 'L') {
                // not allowing L with an exponent
                return foundDigit && !hasExp;
            }

            if (chars[i] == 'l'
                || chars[i] == 'L') {
                // not allowing L with an exponent
                return foundDigit && !hasExp && !hasDecPoint;
            }