85 line program...wondering if it's possible to do in Applets

[john price]

I have never created an applet before. I do know Java and HTML though. I have a server, which is currently running as an application. Is there a way to port this to an Applet? If the server was online (I have a website that I could put it on), I wouldn't have to have it running on my computer. The client is running and will run as an application. Here is my server code:
NOTE: Places that are security codes and otherwise things you shouldn't know will be replaced with ******'s...Don't worry about that, just the application.

import java.io.*;
import java.net.*;
import java.util.*;

public class SimpleChatServer {
ArrayList clientOutputStreams;
int online = 0;
	public class ClientHandler implements Runnable {
		BufferedReader reader;
		Socket sock;
		public ClientHandler(Socket clientSocket) {
			try {
				sock = clientSocket;
				InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
				reader = new BufferedReader(isReader);
				}
			catch(Exception ex) {ex.printStackTrace();}
		}
	public void run() {
	String message;
		try {
			while ((message = reader.readLine()) != null) {
			if (message.startsWith("********************")) {
			message = message.substring(20);
			if (message.startsWith("********")) {}
			else {
			tellEveryone(message);
			}
			}
			else if (message.startsWith("********************")) {
			message = message.substring(20);
			if (message.contains("subtract one from member")) {
			online --;
			}
			else if (message.contains("add one from member")) {
			online ++;
			}
			else {
			tellEveryone(message);
			}
			}
			else if (message.equals("***************")) {
			online --;
			message = "0" + online;
			}
			}
		}
		catch(Exception ex) {
		ex.printStackTrace();}
	}
	}
@SuppressWarnings("unchecked") 
public static void main (String[] args) {
new SimpleChatServer().go();
}
@SuppressWarnings("unchecked") 
public void go() {
clientOutputStreams = new ArrayList();
	try {
	ServerSocket serverSock = new ServerSocket(****);
		while(true) {
		Socket clientSocket = serverSock.accept();
		PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
		clientOutputStreams.add(writer);
		Thread t = new Thread(new ClientHandler(clientSocket));
		t.start();;
		online ++;
		}
	}
	catch(Exception ex) {ex.printStackTrace();}
}
public void tellEveryone(String message) {
Iterator it = clientOutputStreams.iterator();
	while(it.hasNext()) {
		try {
		PrintWriter writer = (PrintWriter) it.next();
		String aString = Integer.toString(online);
		writer.println(aString + message);
		writer.flush();
		}
		catch(Exception ex) {
		ex.printStackTrace();}
	}
	}
}

Do I have to make any major changes? Do I just have to extend Applet?
Thanks,
John Price aka cc11rocks

[Paul Clapham]

I don't see a GUI, so I can't understand what would be the point of making it an applet. It is possible to have applets which don't display anything in their GUI, but why would you want a chat server to run as an applet?

Also you would have to sign your applet to allow it to act as a socket server.

[john price]

I just need a server to be online, and not on my computer. Would a user have to be on my website for the server to work? If so, this is not what I want. I just got my first applet up and running on my website, so I guess I know how to use it know.
Check my knowledge please:
Applet starts code from init() method.

Question:
From the init method, you can add other methods to run?

Example of my Question (no I'm not writing code, just making sure I know how applets work):

init() {
jtextfield;
jtextfield.addKeyListener(this);
}
keyTyped(KeyEvent tester) {
jtextfield.setText("Hello world");
}

If someone typed any character, the jtextfield would display the string "Hello World" in their, correct? I just want to make sure everything is the same.

General questions:
How do you use/create and what are signed applets?
What are the major differences between Applets and Applications, coding-wise? (I know there is no JFrame, JPanel, etc.)

Thanks,
cc11rocks aka John Price

EDIT FOR CLARIFICATION(To the people who may think I'm stupid and/or don't know how to code):
Yes, I know the code uphead won't compile. I am using a general overview to ask my question and give an example. I know you have to implement keylistener and use all the methods and stuff. I realize the jtextfield isn't initialized. This is a general type code, mostly asking about syntax and not about the code itself, since Java Applications and Applets (to my knowlege), have the same code (and especially for JTextFields).