Urgent Java help needed, please!

Urgent!
Help!

As part of an old assignment, I was told to discuss two uses for a layout of buttons/text areas/labels. Being the smart-arse that I am, I decided to go a little more advanced, and show off my technical know-how. I discussed a parallel LCD configuration device, and a network monitoring tool.

Oh guess what! The next assignment is - program one of your ideas.

I've been doing java for about a month now (2x1 hour lectures a week + basic fumbling around with JCreator). That's seriously not enough to be able to get this assignment finished for tomorrow. So I'm begging for a little help, here - just a pointer in the right direction would be massively appreciated.


I have this:

Code:

---

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

public class MyIP {
  public static void main(String args[]) {
    String ip = new MyIP().myIP();
    System.out.println(ip);
  }

  public String myIP() {
    try {
      return InetAddress.getLocalHost().getHostAddress();
    }
    catch (IOException e) {
      return "unknown";
    }
  }
}

---

What I need it to do, however, is to print the IP on a Label... I really have no idea how to incorporate the above into my code. Gah!

This not help?

http://java.sun.com/docs/books/tutor...nts/label.html

What sort of app is it? Application? Applet? Why not get a web server to print out the IP?

It's an Applet, chap.

Basically, the user opens the applet on their machine and they're presented with their ip address in label form.

Code:

---

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

public class MyIP extends Applet {
  static String ip;
  Label l1;
  public static void main(String args[]) {
    ip = new MyIP().myIP();
    System.out.println(ip);
  }

  public String myIP() {
    try {
      return InetAddress.getLocalHost().getHostAddress();
    }
    catch (IOException e) {
      return "unknown";
    }
  }
  public void init() {
          l1 = new Label();
          add (l1);
          l1.setText(ip);
  }
}

---

I've tried that - it compiles, but nothing is displayed in the applet.

whats with the
ip = new MyIP().myIP();

shouldn't it just be something like
String ip = new String(myIP());

and why have you made ip static?

Quote:

---

Originally Posted by Theo

Basically, the user opens the applet on their machine and they're presented with their ip address in label form.

---

Ok - Applets do not need a main() method. The init() method is run on an applet on its first invocation - you can do the label setup here.
Keep it simple.

Basically, all you need to do is implement an init() method that

1. creates a label
2. set the label text to that of the IP address
3. add the label

Thats it.

e.g.

Code:

---

        public void init()
        {
                JLabel label = new JLabel();
               
                try {
                          label.setText(InetAddress.getLocalHost().getHostAddress());
                        }
                        catch (IOException e) {
                        }
                       
                add(label);
        }

---

cheers,
dave

Quote:

---

Originally Posted by Slick

whats with the
ip = new MyIP().myIP();

shouldn't it just be something like
String ip = new String(myIP());

and why have you made ip static?

---

Because I'm a newbie who knows not what he's doing :D

wilkied, you've saved my life. Thanks chap... all I've got to do now is event handlers for 6 buttons, 3 text areas, and 2 checkboxes :|

I'd just like to say thanks to all of you, actually - for reading and pointing me in the general direction. Much appreciated.