class NetUtil {

    public static byte[] createByteArrayFromIpAddressString(String ipAddressString) {

        if (isValidIpV4Address(ipAddressString)) {
            return validIpV4ToBytes(ipAddressString);
        }

        if (isValidIpV6Address(ipAddressString)) {
            if (ipAddressString.charAt(0) == '[') {
                ipAddressString = ipAddressString.substring(1, ipAddressString.length() - 1);
            }

            int percentPos = ipAddressString.indexOf('%');
            if (percentPos >= 0) {
                ipAddressString = ipAddressString.substring(0, percentPos);
            }

            return getIPv6ByName(ipAddressString, true);
        }
        return null;
    }

    private  NetUtil();

}