Java Regex to Validate IPV4, IPV6 IP address and Port range, Java IP address validation, Regex expression for IP address

private static final String ipv4Pattern = "(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])";
private static final String ipv6Patten = "^(((?=(?>.*?::)(?!.*::)))(::)?([0-9A-F]{1,4}::?){0,5}"
            + "|([0-9A-F]{1,4}:){6})(\\2([0-9A-F]{1,4}(::?|$)){0,2}|((25[0-5]"
            + "|(2[0-4]|1\\d|[1-9])?\\d)(\\.|$)){4}|[0-9A-F]{1,4}:[0-9A-F]{1,"
            + "4})(?<![^:]:|\\.)\\z";

    private static final String portRegex = "^(6553[0-5]|655[0-2]\\d|65[0-4]\\d\\d|6[0-4]\\d{3}|[1-5]\\d{4}|[2-9]\\d{3}|1[1-9]\\d{2}|10[3-9]\\d|102[4-9])$";

Complete Code:

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.regex.Pattern;

public class IPValidate {

private static Pattern VALID_IPV4_PATTERN = null;

private static Pattern VALID_IPV6_PATTERN = null;

private static Pattern VALID_PORT_PATTERN = null;

private static Pattern CHECK_IPV6_ADDRESS = null;

private static String COMMA = ",";

private static String COLON = ":";

private static String CLOSE_BRACKET = "]";

private static String CLOSE_BRACKET_AND_COLON = "]:";

private static final String ipv4Pattern = "(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])";

private static final String ipv6Patten = "^(((?=(?>.*?::)(?!.*::)))(::)?([0-9A-F]{1,4}::?){0,5}"

            + "|([0-9A-F]{1,4}:){6})(\\2([0-9A-F]{1,4}(::?|$)){0,2}|((25[0-5]"

            + "|(2[0-4]|1\\d|[1-9])?\\d)(\\.|$)){4}|[0-9A-F]{1,4}:[0-9A-F]{1,"

            + "4})(?<![^:]:|\\.)\\z";

    private static final String portRegex = "^(6553[0-5]|655[0-2]\\d|65[0-4]\\d\\d|6[0-4]\\d{3}|[1-5]\\d{4}|[2-9]\\d{3}|1[1-9]\\d{2}|10[3-9]\\d|102[4-9])$";

private static final String ip6address = "^\\[([0-9a-fA-F:]*)\\]:(.*)";

public IPValidate(){

VALID_IPV4_PATTERN = Pattern.compile(ipv4Pattern, Pattern.CASE_INSENSITIVE);

VALID_IPV6_PATTERN = Pattern.compile(ipv6Patten, Pattern.CASE_INSENSITIVE);

VALID_PORT_PATTERN = Pattern.compile(portRegex, Pattern.CASE_INSENSITIVE);

CHECK_IPV6_ADDRESS = Pattern.compile(ip6address, Pattern.CASE_INSENSITIVE);

}

private boolean validateIP4Address(String ip){

return VALID_IPV4_PATTERN.matcher(ip).matches();

}

private boolean validateIP6Address(String ip){

return VALID_IPV6_PATTERN.matcher(ip).matches();

}

private boolean validatePortNumber(String port){

return VALID_PORT_PATTERN.matcher(port).matches();

}

private boolean isIPV6Address(String ip){

return ip.contains("[")&&ip.contains("]");

}

private List getSeperatedList(String data, String delimeter){

//return Pattern.compile(delimeter).splitAsStream(data).collect(Collectors.toList());

return new ArrayList(Arrays.asList(data.split(delimeter)));

}

public boolean validateIPAddress(String ips){

List ipsList = getSeperatedList(ips,COMMA);

List ipAndPort = null;

String ipAddress = null;

String port = null;

for(String ip : ipsList){

ip=ip.trim();

if(isIPV6Address(ip)){

ipAndPort = getSeperatedList(ip,CLOSE_BRACKET_AND_COLON);

if(ipAndPort.size()!=2){

System.out.println("Invalid format. Please specify the IP addresses and port numbers again."); 

return false;

}

ipAddress = ipAndPort.get(0).trim().substring(1); // to remove [

port = ipAndPort.get(1).trim(); // to remove :

if(!(validateIP6Address(ipAddress))){

System.out.println("The specified IVP6 address is invalid. Please specify the IP addresses again.");

return false;

}

}else{

ipAndPort = getSeperatedList(ip,COLON);

if(ipAndPort.size()!=2){

System.out.println("Invalid format. Please specify the IP addresses and port numbers again.");

return false;

}

ipAddress = ipAndPort.get(0).trim();

port = ipAndPort.get(1).trim();

if(!(validateIP4Address(ipAddress))){

System.out.println("The specified IPV4 address is invalid. Please specify the IP addresses again.");

return false;

}

}

if(!(validatePortNumber(port))){

System.out.println("The specified port is invalid. Please specify port numbers again.");

return false;

}

}

return true;

}

public static void main(String[] args) {

IPValidate demo = new IPValidate();

String ips = "[2001:0:1234::c1c0:abcd:876d]:9090,10.90.200.252:6500,29.90.39.89:2918,[2001:0:1234::c1c0:abcd:876]:9090";

//String ips = "[::1]:9090,10.90.20.98:8009";

//String ips = "[::1]:9099";

//String ips = "2.3.4.5:3757";

//String ips="";

boolean isIPAddressValidate = demo.validateIPAddress(ips);

System.out.println("isIPAddressValidate :"+isIPAddressValidate);

}

}