Thread Gui Socket Challange

Question

The problem is when i start the thread form the MAIN class, the connection is ok but when i try to update the GUI the update does not come true.
The System does not update the component i like to add tru the following methode.
Why does the system not update and how can i make it work.
computerview.setComputer("Izzy",new ComputerControl());
import javax.swing.*;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;
import java.awt.event.ActionEvent;
public class Server extends Thread{
        JButton addComp = new JButton();
        String inputLine;
        ComputerView computerview = new ComputerView();
    public void startServer() throws IOException {
        ServerSocket serverSocket = null;
        try {
            serverSocket = new ServerSocket(4444);
        } catch (IOException e) {
            System.err.println("Could not listen on port: 4444.");
        Socket clientSocket = null;
        try {
            clientSocket = serverSocket.accept();
        } catch (IOException e) {
            System.err.println("Accept failed.");
        PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
        BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
        out.println("Hello Client");
        while ((inputLine = in.readLine()) != null) {
             String state = "WAITING";
            System.out.println(state);
            if(state.equals("WAITING")){
                if (inputLine.equals("ID")){
                   System.out.println("Client :"+inputLine );
                      out.println("Who are you?");
                      state = "WAITINGFORID";
                      System.out.println(state);
            if(state.equals("WAITINGFORID")){
                      computerview.setComputer("Izzy",new ComputerControl());
                      out.println("You are now Registred!");
                      state = "WAITING";
                      System.out.println(state);
    public void run(){
         try {
            startServer();
        } catch (IOException e) {
            System.err.println(e);
}

Answer 1

As a general rule all GUI components should be updated from the event thread thread which means you may need to use the SwingUtilities.invokeLater(...) method to do the updates. This thread give a simple example:
http://forum.java.sun.com/thread.jsp?forum=57&thread=437592