Java IP Address Get getIPFromInterface(String ni)

Description

get IP From Interface

License

LGPL

Declaration

public static String getIPFromInterface(String ni) throws UnknownHostException, SocketException 

Method Source Code

//package com.java2s;
//License from project: LGPL 

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.net.UnknownHostException;
import java.util.Enumeration;

public class Main {
    public static String getIPFromInterface(String ni) throws UnknownHostException, SocketException {

        if (ni.equals("lo")) {
            return InetAddress.getLocalHost().getHostAddress();
        }/*  ww w.  j a v a  2 s .c  om*/

        //other Network interfaces
        Enumeration<NetworkInterface> n = NetworkInterface.getNetworkInterfaces();
        for (; n.hasMoreElements();) {
            NetworkInterface e = n.nextElement();

            if (e.getDisplayName().equals(ni)) {
                return getIPAddress(e);
            }

        }

        return null;
    }

    public static String getIPAddress(NetworkInterface e) {
        Enumeration<InetAddress> a = e.getInetAddresses();
        for (; a.hasMoreElements();) {
            InetAddress addr = a.nextElement(); //IPv6 
            addr = a.nextElement(); //IPv4

            return addr.getHostAddress();

        }

        return null;
    }
}

Related

1. getIpByHost(String hostName)
2. getIPByInterfaceName(String name)
3. getIpByName(String name)
4. getIpByNetworkInterfaceName(String name)
5. getIPFromHash(final long ipHash)
6. getIPFromNetworkInterface()
7. getIpHostnameLocal()
8. getIPList(String address)
9. getIPList(String s, String s1)