I have an array, and thought it would be much better if i changed it to an Arraylist because Arraylists can grow dynamically!

I have tried to convert my array to an arraylist, but it does not seem to work.

i want to have an unlimited ammount of users that can connect possibly. at the minute only five can connect because that is what is declared in the array. i know i could just increase the array, but i want it to add and remove users when they log out.

here is my code, any help would be greatly appreciated.

Thannks.

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

class Connection
{
public Socket s;
public PrintWriter o;
public BufferedReader i;
}

class TCPChatServerThreadTask extends Thread
{
Connection c;

public TCPChatServerThreadTask (ServerSocket serverSocket) throws IOException
{
c = new Connection ();

c.s = serverSocket.accept ();
c.o = new PrintWriter (c.s.getOutputStream (), true);
c.i = new BufferedReader (new InputStreamReader (c.s.getInputStream ()));

System.out.println (c.s.getInetAddress () + ":" + c.s.getPort () + " Connected");

this.start ();
}

public void run ()
{
String fromClient = ">";

try
{
do
{
fromClient = c.i.readLine ();

System.out.println (c.s.getInetAddress () + ":" + c.s.getPort () + "> " + fromClient);

for (int i = 0; i < TCPChatServerThread.taskCount - 1; i ++)
{
TCPChatServerThread.task[i].c.o.println (c.s.getInetAddress () + ":" + c.s.getPort () + "> " + fromClient);
}
}
while (fromClient != "quit");

System.out.println (c.s.getInetAddress () + ":" + c.s.getPort () + " Disconnected");

c.o.close ();
c.i.close ();
c.s.close ();
}
catch (IOException e)
{
}
}
}

public class TCPChatServerThread
{
ServerSocket serverSocket = null;
static public String str = "?";
static public TCPChatServerThreadTask[] task = new TCPChatServerThreadTask[10];
static public int taskCount = 0;

public TCPChatServerThread () throws IOException
{
try
{
serverSocket = new ServerSocket (4455);
}
catch (IOException e)
{
System.err.println ("Server: Could not listen on port: ");
System.exit (1);
}

System.out.println ("Server: Listening on port: ");

while (true)
{
task[taskCount ++] = new TCPChatServerThreadTask (serverSocket);
}
}

public static void main (String[] args) throws IOException
{
TCPChatServerThread e = new TCPChatServerThread ();
}
}