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Thread: Beginner: Get Local IP address from Java applet

  1. #1
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    Question Beginner: Get Local IP address from Java applet

    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());
    		}
    	}
    }


  2. #2
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    Default Beginner: Get Local IP address from Java applet

    Wops. double post
    Last edited by Killingeskibet; January 26th, 2013 at 11:20 AM. Reason: Double post

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    Super Moderator Norm's Avatar
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    Default Re: Beginner: Get Local IP address from Java applet

    How are you executing the code? Applets are meant to run in a browser not with the java command.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Beginner: Get Local IP address from Java applet

    Quote Originally Posted by Norm View Post
    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.

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: Beginner: Get Local IP address from Java applet

    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
    If you don't understand my answer, don't ignore it, ask a question.

  6. The Following User Says Thank You to Norm For This Useful Post:

    curmudgeon (January 26th, 2013)

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