Re: how can I know the IP of the local computer

From:
=?ISO-8859-1?Q?Arne_Vajh=F8j?= <arne@vajhoej.dk>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 12 Nov 2006 18:40:32 -0500
Message-ID:
<4557b0ee$0$49206$14726298@news.sunsite.dk>
lrantisi wrote:

how can I know the IP of the local computer, using java InetAddress
maybe or another object.


Simple:

import java.net.*;

public class Localhost {
     public static void main(String[] args) throws Exception {
          System.out.println(InetAddress.getLocalHost().getHostAddress());
     }
}

more advanced:

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

public class NI15 {
     public static void main(String[] args) throws Exception {
         Enumeration e = NetworkInterface.getNetworkInterfaces();
         while(e.hasMoreElements()) {
             NetworkInterface ni = (NetworkInterface)e.nextElement();
             System.out.println("Net interface: " + ni.getName());
             Enumeration e2 = ni.getInetAddresses();
             while (e2.hasMoreElements()){
                 InetAddress ip = (InetAddress)e2.nextElement();
                 System.out.println("IP address: " + ip.getHostAddress());
             }
         }
     }
}

Arne

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