TCP/IP CLient-Server Chat Program

Hi Guys,

I'm quite new here and am new to Java Programming, but i could use some help. I have a client-serve chat program and have almost finished it to my standards however I am trying to enable the server to accept multiple clients, how would i do this? what do i have to add or change on the server to allow this?

Thanks

Server

import java.awt.*;
import java.net.*;
import java.awt.*;          
import java.awt.event.*;    
import javax.swing.*;       
import javax.swing.event.*;
import java.io.*;

public class SwingChatServer extends SwingChatGUI
{
	public String outline;
    public String fromClient, s = "";
	PrintWriter out;
	BufferedReader in;
	BufferedReader stdin;
	String inputLine, outputLine;
	public ButtonHandler bHandler = new ButtonHandler();
    
	public SwingChatServer (String title)
	{
		super (title);
		bHandler = new ButtonHandler ();
		sendButton.addActionListener (bHandler);
	}

private class ButtonHandler implements ActionListener
	{
		public void actionPerformed (ActionEvent event)
		{
			outputLine = txArea.getText ();
			System.out.println ("Server :> " + outputLine);
			out.println (outputLine);
			outline = txArea.getText ();
			s = "Server :>"+ outline+"\n";
			rxArea.append(s);
			txArea.setText("");
    	}
	}
    
	public void run () throws IOException
	{
		ServerSocket serverSocket = null;
       
		try
        {
        	serverSocket = new ServerSocket (4444);
        }
        catch (IOException e)
        {
        	System.err.println ("Could not listen on port: 4444.");
        	System.exit (1);
        }

Socket clientSocket = null;
        try
        {
        	clientSocket = serverSocket.accept ();
        }
        catch (IOException e)
        {
        	System.err.println ("Accept failed.");
        	System.exit(1);
        }

out = new PrintWriter (clientSocket.getOutputStream (), true);
    	in = new BufferedReader (new InputStreamReader (clientSocket.getInputStream ()));
    	//stdin = new BufferedReader (new InputStreamReader (System.in));

out.println ("Welcome to the Chat Server");

while ((fromClient = in.readLine ()) != null) //allows a new line to not over write the chat
		{
			System.out.println ("Client :> " + fromClient);
			s = "Client :>" + fromClient + "\n";
			rxArea.append (s);
			
			if (fromClient.equals ("Bye"))System.exit(0);

}
		
        out.close();
        in.close();
        clientSocket.close();
        serverSocket.close();
    }

public static void main(String[] args) //throws IOException
    {

SwingChatServer frame = new SwingChatServer ("Chat Server Program");
		
		frame.pack ();
		frame.setVisible(true);
		frame.setIconImage(Toolkit.getDefaultToolkit().getImage("chat.jpg"));
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
		try
		{
			frame.run ();
		}
		catch (IOException e)
		{
			System.err.println("Couldn't get I/O for the connection to: 194.81.104.118!\n");
			System.exit(1);
		}

} 
}

Remember that when you accept() a connection you communicate on that Socket, not the ServerSocket. So the traditional way is to have a thread to handle each client. I started a how to on this years ago - I should finish it but basically you'll spawn a thread for each clientSocket and handle the client that way. The thread can live as long as your protocol wants - usually for the life of the conversation.

First things, thank you for your reply, secondly how would I do this? What would the coding be?

Thanks