package ru.utils;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class IPUtils {

    public static boolean isValidIPAddress(String ip)
    {

        String zeroTo255
            = "(\\d{1,2}|(0|1)\\"
              + "d{2}|2[0-4]\\d|25[0-5])";

        String regex
            = zeroTo255 + "\\."
              + zeroTo255 + "\\."
              + zeroTo255 + "\\."
              + zeroTo255;

        Pattern p = Pattern.compile(regex);

        // If the IP address is empty
        // return false
        if (ip == null) {
            return false;
        }

        // Pattern class contains matcher() method
        // to find matching between given IP address
        // and regular expression.
        Matcher m = p.matcher(ip);

        // Return if the IP address
        // matched the ReGex
        return m.matches();
    }
}