Generates random string non case-sensitive

GenerateCommonLangRandomString.java

    /** Generates random string non-case-sensitive alphanumeric, and special chars **/
    public static String generateCommonLangRandomString() {
        String upperCaseLetters = RandomStringUtils.random(4, 65, 90, true, true);
        String lowerCaseLetters = RandomStringUtils.random(4, 97, 122, true, true);
        String numbers = RandomStringUtils.randomNumeric(4);
        String specialChar = RandomStringUtils.random(2, 33, 47, false, false);
        String totalChars = RandomStringUtils.randomAlphanumeric(2);
        String combinedChars = upperCaseLetters.concat(lowerCaseLetters).concat(numbers)
            .concat(specialChar)
            .concat(totalChars);
        List<Character> pwdChars = combinedChars.chars().mapToObj(c -> (char) c).collect(Collectors.toList());
        Collections.shuffle(pwdChars);
        String password = pwdChars.stream().collect(StringBuilder::new, StringBuilder::append, StringBuilder::append).toString();
        return password;
    }