Using Sockets to Update Active Users in a Chat

Question

Hello. I am developing a multi-player game for a class using sockets. When a player loads the game, it first opens a GUI that allows the user to enter the hostname, port number of the server and their username. Upon connecting, the user can type into a chat area with other users. Now, i am trying to get the program to keep track of current users connected in a TextArea, but am having problems. Here is my relevent code for the chat.
* Recieves messages from the server
public void run() {
try {
while (true) {
     String line = (i.readUTF ());
outputText.appendText (line + "\n");
} catch (IOException ex) {
ex.printStackTrace ();
} finally {
listener = null;
inputText.hide ();
validate ();
try {
o.close ();
} catch (IOException ex) {
ex.printStackTrace ();
* Handles user interation
public boolean handleEvent (Event e) {
if ((e.target == inputText) && (e.id == Event.ACTION_EVENT)) {
System.out.println(e.target + " " + e.id);
try {
     o.writeUTF (user + ": " + (String) e.arg);
o.flush ();
} catch (IOException ex) {
ex.printStackTrace();
listener.stop ();
inputText.setText ("");
return true;
} else if ((e.target == this) && (e.id == Event.WINDOW_DESTROY)) {
if (listener != null)
listener.stop ();
hide ();
return true;
return super.handleEvent (e);
So what would i do to keep track of the users currently connected in a TextArea. Thanks.

Answer 1

Sorry, I did not see the code format.
     * Recieves messages from the server
    public void run() {
        try {
      while (true) {
       String line = (i.readUTF ());
        outputText.appendText (line + "\n");
    } catch (IOException ex) {
      ex.printStackTrace ();
    } finally {
      listener = null;
      inputText.hide ();
      validate ();
      try {
        o.close ();
      } catch (IOException ex) {
        ex.printStackTrace ();
     * Handles user interation
    public boolean handleEvent (Event e) {
    if ((e.target == inputText) && (e.id == Event.ACTION_EVENT)) {
        System.out.println(e.target + " " + e.id);
      try {
       o.writeUTF (user + ": " + (String) e.arg);
        o.flush ();
      } catch (IOException ex) {
        ex.printStackTrace();
        listener.stop ();
      inputText.setText ("");
      return true;
    } else if ((e.target == this) && (e.id == Event.WINDOW_DESTROY)) {
      if (listener != null)
        listener.stop ();
      hide ();
      return true;
    return super.handleEvent (e);
  }