Beginner: Get Local IP address from Java applet

**Killingeskibet** · January 26th, 2013, 06:43 AM

Hey guys,

I'm new to java programming, and look forward to some help with my java applet here. I've tried to follow some guides, i might have just stuck my nose too far ahead for my skill level, but can you help me out?

Im trying to receive Local and Public IP address, by running a web applet.

The code goes:

import java.applet.Applet;
import java.net.*;
import java.util.*;
import java.io.*;
 
 
public class GetIP extends Applet
 
{
	public static void main(String[] args)	{
       		        System.out.println("Test print");
		try
		{
			System.out.println("Local IP: " + InetAddress.getLocalHost().getHostAddress());
 
		}
		catch (Exception ex)	
		{
		System.out.println("Error: " + ex.getMessage());
		}
		try
		{
			String url = "http://vallentinsource.com/globalip.php";
 
			BufferedReader br = new BufferedReader(new InputStreamReader(new URL(url).openStream()));
			String receive = br.readLine();
 
			System.out.println("PublicIP: " + receive);
		}
		catch	(Exception ex)	
		{
			System.out.println("Error: " + ex.getMessage());
		}
	}
}

**Killingeskibet** · January 26th, 2013, 07:10 AM

Wops. double post

**Norm** · January 26th, 2013, 07:43 AM

How are you executing the code? Applets are meant to run in a browser not with the java command.

**Killingeskibet** · January 26th, 2013, 11:19 AM

Originally Posted by Norm

How are you executing the code? Applets are meant to run in a browser not with the java command.

Hi Norm,

Thanks for replying.

I'm executing the code from a .html file, such as:

<Html>
<Head>
<Title>Java test</Title>
</Head>
 
<Body>
Test<br>
<br>
<br>
<Applet Code="F:\Path\to\class\GetIP.class">
</Applet>
</Body>
</Html>

Am i missing something?

When i do run the code from my console, it reports back fine with the results.

**Norm** · January 26th, 2013, 11:45 AM

Read up on applets and how they are executed in a browser:
Lesson: Java Applets (The Java™ Tutorials > Deployment)

Applets doe NOT use a main() method. That's for apps

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