How can i check System IP Address/Host Name in Java?

Question

is there any way to find out system IP Address without using external process? I want to grab this information for my application but in pure java if possible.

Are you trying to find in web application or desktop application ? — Ratna Dinakar, Dec 27 '10 at 00:49

score 3 · Answer 1 · answered Dec 27 '10 at 00:51

3

Does this meet your needs?

import java.net.*;
import java.io.*;
import java.applet.*;

public class GetClientIP extends Applet {
  public void init() {
    try {
     InetAddress thisIp =
        InetAddress.getLocalHost();
     System.out.println("IP:"+thisIp.getHostAddress());
     }
    catch(Exception e) {
     e.printStackTrace();
     }
    }
}

answered Dec 27 '10 at 00:51

THE DOCTOR

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Why an applet example? Quickly copypasted from Google? – BalusC Dec 27 '10 at 01:01
@BalusC - Why not an applet? What difference does it make if it was copy/paste or not? This is not an unusual request that would require custom code to be written at all. The example demonstrates the concept whether OP desires to make an applet, a class, or anything else. – THE DOCTOR Dec 27 '10 at 01:07
The Applet is completely extraneous. What happens if you remove the `extends Applet`? – President James K. Polk Dec 27 '10 at 02:10
@GregS - Yes, one could remove import java.applet.*; and extends Applet. It would work just as well. It makes no difference and does not affect functionality. – THE DOCTOR Dec 27 '10 at 02:44

score 1 · Answer 2 · edited May 23 '17 at 12:29

1

The InetAddress.getLocalHost().getHostAddress() call doesn't always work; sometimes it returns 127.0.0.1.

See java InetAddress.getLocalHost(); returns 127.0.0.1 ... how to get REAL IP? for some more details and other options.

edited May 23 '17 at 12:29

Community

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answered Sep 07 '11 at 12:41

Eric

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score 0 · Answer 3 · edited Dec 27 '10 at 02:12

0

If you want to find ip address in java application

 InetAddress localIP=InetAddress.getLocalHost();

and if you are using web application

  request.getRemoteAddr();

edited Dec 27 '10 at 02:12

President James K. Polk

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answered Dec 27 '10 at 00:51

Ratna Dinakar

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score 0 · Answer 4 · answered Dec 27 '10 at 00:51

0

Have a look at InetAddress http://download.oracle.com/javase/1.4.2/docs/api/java/net/InetAddress.html

answered Dec 27 '10 at 00:51

peter.murray.rust

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YES! A link to Java 1.4 which is EOLifed ;) – SyntaxT3rr0r Dec 27 '10 at 01:04

score 0 · Answer 5 · answered Dec 27 '10 at 00:52

0

Hi yes its possible with the class InetAddres. Check this link JAVA API and the method you need is getHostAddress()

answered Dec 27 '10 at 00:52

Jorge Machado

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score 0 · Answer 6 · answered Dec 27 '10 at 00:53

0

Consider using the NetworkInterface class.

answered Dec 27 '10 at 00:53

President James K. Polk

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How can i check System IP Address/Host Name in Java?

6 Answers6

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