At times, your device can be exposed using multiple interface cards. The following code sample will help identify various interfaces and the related IP configuration available on them.

import java.net.*;import java.util.*;public class NetworkInterfaceIPs {   public static void main(String args[])   {      NetworkInterfaceIPs networkInterfaceIPs = new NetworkInterfaceIPs();      networkInterfaceIPs.proceed();   }   private void proceed()    {      try      {         Enumeration networkInterfaces = NetworkInterface.getNetworkInterfaces();         InetAddress inetAddress = null;         System.out.println("Available IPs in NetworkInterface.");         while (networkInterfaces.hasMoreElements()) {                NetworkInterface networkInterface = (NetworkInterface) networkInterfaces.nextElement();                Enumeration inetAddresses = networkInterface.getInetAddresses();                            while (inetAddresses.hasMoreElements()) {                    inetAddress = inetAddresses.nextElement();                    if (inetAddress instanceof Inet4Address) { //Working on only IPv4 IPs                  System.out.println("IP: " + inetAddress.getHostAddress());                    }                               }            }               }catch(SocketException se)      {         System.out.println("SocketException: " + se);      }   }}/*

Expected output:

[root@mypc]# java NetworkInterfaceIPsAvailable IPs in NetworkInterface.IP: 127.0.0.1IP: 134.220.154.89*/