Парсинг IP из двоичного файла

package com.parseip;
 
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class ParseIp {
 
    private static final String IPV4_PATTERN = "(([0-1]?[0-9]{1,2}\\.)|(2[0-4][0-9]\\.)|(25[0-5]\\.)){3}(([0-1]?[0-9]{1,2})|(2[0-4][0-9])|(25[0-5]))";
    private static final String IPV6_PATTERN = "(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))";
 
    private static final Pattern ipv4Pattern = Pattern.compile(IPV4_PATTERN);
    private static final Pattern ipv6Pattern = Pattern.compile(IPV6_PATTERN);
 
    public static void main(String[] args) {
        String string = null;
 
        Matcher ipv4Matcher = null;
        Matcher ipv6Matcher = null;
 
        try (BufferedReader bufferedReader = new BufferedReader(new FileReader("ips.txt"))) {
            while ((string = bufferedReader.readLine()) != null) {
                ipv4Matcher = ipv4Pattern.matcher(string);
                ipv6Matcher = ipv6Pattern.matcher(string);
 
                if (ipv4Matcher.find()) {
                    System.out.println(" - ipv4address: " + ipv4Matcher.group());
                } else if (ipv6Matcher.find()) {
                    System.out.println(" - ipv6address: " + ipv6Matcher.group());
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
 
    }
 
}