Help pls

hi im trying to build chat program in java and i have source code of multithreaded server and client and its work but its not have a gui
so i desgin a gui in netbeans and i want the prints of the server and client will be on the gui and not in the console so i tried this :

Code:

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/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * NewJFrame.java
 *
 * Created on 18/02/2011, 18:58:15
 */

/**
 *
 * @author Ran
 */
import java.io.*;
import java.net.*;
public class ClientGUI extends javax.swing.JFrame implements Runnable {

        // Declaration section
    // clientClient: the client socket
    // os: the output stream
    // is: the input stream
   
    static Socket clientSocket = null;
    static PrintStream os = null;
    static DataInputStream is = null;
    static BufferedReader inputLine = null;
    static boolean closed = false;
    /** Creates new form NewJFrame */
    public ClientGUI() {
        initComponents();
    }

    /** This method is called from within the constructor to
    * initialize the form.
    * WARNING: Do NOT modify this code. The content of this method is
    * always regenerated by the Form Editor.
    */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jPopupMenu1 = new javax.swing.JPopupMenu();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        jButton1 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        jMenuItem3 = new javax.swing.JMenuItem();
        jMenuItem2 = new javax.swing.JMenuItem();
        jMenuItem1 = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);

        jButton1.setText("Send");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jTextField1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jTextField1ActionPerformed(evt);
            }
        });

        jMenu1.setText("File");

        jMenuItem3.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_C, java.awt.event.InputEvent.ALT_MASK));
        jMenuItem3.setText("Copy Text");
        jMenu1.add(jMenuItem3);

        jMenuItem2.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_PRINTSCREEN, 0));
        jMenuItem2.setText("Capture Screen");
        jMenu1.add(jMenuItem2);

        jMenuItem1.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_F4, java.awt.event.InputEvent.ALT_MASK));
        jMenuItem1.setText("Exit");
        jMenu1.add(jMenuItem1);

        jMenuBar1.add(jMenu1);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 524, Short.MAX_VALUE)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 398, Short.MAX_VALUE)
                .addGap(18, 18, 18)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 88, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 194, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton1, javax.swing.GroupLayout.DEFAULT_SIZE, 52, Short.MAX_VALUE)
                    .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 53, Short.MAX_VALUE))
                .addContainerGap())
        );

        pack();
    }// </editor-fold>

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
            System.out.println ("hi");
    }

    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
     
                new ClientGUI().setVisible(true);
               
//              The default port

                    int port_number=2222;
                    String host="localhost";

                    if (args.length < 2)
                        {
                           
                            System.out.println("Usage: java MultiThreadChatClient  \n"+
                                              "Now using host="+host+", port_number="+port_number);
                        } else {
                            host=args[0];
                            port_number=Integer.valueOf(args[1]).intValue();
                        }
                    // Initialization section:
                    // Try to open a socket on a given host and port
                    // Try to open input and output streams
                    try {
                        clientSocket = new Socket(host, port_number);
                        inputLine = new BufferedReader(new InputStreamReader(System.in));
                        os = new PrintStream(clientSocket.getOutputStream());
                        is = new DataInputStream(clientSocket.getInputStream());
                    } catch (UnknownHostException e) {
                        System.err.println("Don't know about host "+host);
                    } catch (IOException e) {
                        System.err.println("Couldn't get I/O for the connection to the host "+host);
                    }

                    // If everything has been initialized then we want to write some data
                    // to the socket we have opened a connection to on port port_number

                    if (clientSocket != null && os != null && is != null) {
                        try {

                            // Create a thread to read from the server

                            new Thread(new ClientGUI()).start();

                            while (!closed) {
                                os.println(inputLine.readLine());
                            }

                            // Clean up:
                            // close the output stream
                            // close the input stream
                            // close the socket

                            os.close();
                            is.close();
                            clientSocket.close();
                        } catch (IOException e) {
                            System.err.println("IOException:  " + e);
                        }
                    }
       
    }

    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JMenuItem jMenuItem1;
    private javax.swing.JMenuItem jMenuItem2;
    private javax.swing.JMenuItem jMenuItem3;
    private javax.swing.JPopupMenu jPopupMenu1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration
        public void run()
        {
                String responseLine;

                // Keep on reading from the socket till we receive the "Bye" from the server,
                // once we received that then we want to break.
                try{
                    while ((responseLine = is.readLine()) != null) {
                        System.out.println(responseLine);
                        jTextArea1.setText(responseLine);
                        if (responseLine.indexOf("*** Bye") != -1) break;
                    }
                    closed=true;
                } catch (IOException e) {
                    System.err.println("IOException:  " + e);
                }
        }

}

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any suggestions?

what is your exact question:
- do you get any error?
or
- you are asking somebody to do the job for you?

idont get any error
the server need send me back a string into the responseLine and the i use
jTextArea1.setText(responsLine);
and its not set anything when i run the program but when i print it to conlose (s.o.p)
its work but i want it print in the jTextArea1