frame and mouse listener

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Java

now i am getting images of client,mouse action listener command not working
please solve me this problem

i am totally new to this really i am not able to follow this code
here they have used thread i dont know how does it work.
start(); what does this function do..



here i have craeted one frame and add tabbedpanel
in srever pane--having one text field to get the port no and one button "connect client"

if that button is pressed new ServerInitiator() called

if (action!=null && action.equals("Connect Client")){

                        String port = lMainPanelObj.lListiningPortField.getText();
                        System.out.println("heeee System Connected"+port);
                        new ServerInitiator().initialize(Integer.parseInt(port));
                        System.out.println("heeee System77777777777777777777 Connected");
                  }

In this i am facing problem in frames ,

public class ServerInitiator {
      //Main server frame
      public JFrame frame = new JFrame();
      //JDesktopPane represents the main container that will contain all
      //connected clients' screens
      private JDesktopPane desktop = new JDesktopPane();

      //public static void main(String args[]){
      //   String port = JOptionPane.showInputDialog("Please enter listening port");
      //   new ServerInitiator().initialize(Integer.parseInt(port));
   // }

      public void initialize(int port){
                  System.out.println("333333333333333333333"+port);
            try {
                  ServerSocket sc = new ServerSocket(port);
                  //Show Server GUI
                  drawGUI();
                  //Listen to server port and accept clients connections
                  while(true){
                        System.out.println("333333333333333333333"+port);
                        Socket client = sc.accept();
                        System.out.println("New client Connected to the server");
                        //Per each client create a ClientHandler
                        new ClientHandler(client,desktop);
                  }
            } catch (IOException ex) {
                  ex.printStackTrace();
            }
      }

      /*
      * Draws the main server GUI
      */
      public void drawGUI(){
                  frame.add(desktop,BorderLayout.CENTER);
                  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                  frame.setSize(1024,800);
                  frame.setFocusable(true);
                  //Show the frame in a maximized state
                  //frame.setExtendedState(frame.getExtendedState()|JFrame.MAXIMIZED_BOTH);
                  frame.setVisible(true);
      }
}

here it is calling <b>new ClientHandler(client,desktop);</b>

class ClientHandler extends Thread {

      private JDesktopPane desktop = null;
      private Socket cSocket = null;
      private JInternalFrame interFrame = new JInternalFrame("Client Screen",
                                                                                          true, true, true);
      private JPanel cPanel = new JPanel();
     
      public ClientHandler(Socket cSocket, JDesktopPane desktop) {
            System.out.println("Hello ram i am here");
            this.cSocket = cSocket;
            this.desktop = desktop;
            start();
      }

      /*
      * Draw GUI per each connected client
      */
      public void drawGUI(){
            interFrame.setLayout(new BorderLayout());
            interFrame.getContentPane().add(cPanel,BorderLayout.CENTER);
            interFrame.setSize(1024,100);
            desktop.add(interFrame);
         try {
                  //Initially show the internal frame maximized
                  interFrame.setMaximum(true);
            } catch (PropertyVetoException ex) {
                  ex.printStackTrace();
            }
            //this allows to handle KeyListener events

            cPanel.setFocusable(true);
            interFrame.setVisible(true);
      }

      public void run(){

            //used to represent client screen size
            Rectangle clientScreenDim = null;
            //Used to read screenshots and client screen dimension
            ObjectInputStream ois = null;
            //start drawing GUI
            drawGUI();

            try{
                  //Read client screen dimension
                  ois = new ObjectInputStream(cSocket.getInputStream());
                  clientScreenDim =(Rectangle) ois.readObject();
            }catch(IOException ex){
                  ex.printStackTrace();
            }catch(ClassNotFoundException ex){
                  ex.printStackTrace();
            }
            //Start recieveing screenshots
            new ClientScreenReciever(ois,cPanel);
            System.out.println("hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh");
            //Start sending events to the client
            new ClientCommandsSender(cSocket,cPanel,clientScreenDim);
      }

}

here it is calling <b>new

ClientScreenReciever(ois,cPanel);</b>
                                 new <b>ClientCommandsSender(cSocket,cPanel,clientScreenDim);</b>

i am facing problem in
<b>ClientCommandsSender(cSocket,cPanel,clientScreenDim)</b>

here am facing problem

KeyListener(this);
addMouseListener(this);
addMouseMotionListener(this);

public class ClientCommandsSender implements KeyListener,
            MouseMotionListener,MouseListener {

      private Socket cSocket = null;
      private JPanel cPanel = null;
      private PrintWriter writer = null;
      private Rectangle clientScreenDim = null;

      ClientCommandsSender(Socket s, JPanel p, Rectangle r) {
            cSocket = s;
            cPanel = p;
            clientScreenDim = r;

            //Associate event listners to the panel
            cPanel.addKeyListener(this);
            cPanel.addMouseListener(this);
            cPanel.addMouseMotionListener(this);
            try {
                  //Prepare PrintWriter which will be used to send commands to
                  //the client
                  System.out.println("fffffffffffffffffffffffffffffff"+this);
                  writer = new PrintWriter(cSocket.getOutputStream());
            } catch (IOException ex) {
                  ex.printStackTrace();
            }
           
      }

      //Not implemeted yet
      public void mouseDragged(MouseEvent e) {
      }

      public void mouseMoved(MouseEvent e) {

            double xScale = clientScreenDim.getWidth()/cPanel.getWidth();
            System.out.println("xScale: " + xScale);
            double yScale = clientScreenDim.getHeight()/cPanel.getHeight();
            System.out.println("yScale: " + yScale);
            System.out.println("Mouse Moved");
            writer.println(EnumCommands1.MOVE_MOUSE.getAbbrev1());
            writer.println((int)(e.getX() * xScale));
            writer.println((int)(e.getY() * yScale));
            writer.flush();
      }

      //this is not implemented
      public void mouseClicked(MouseEvent e) {
      }

      public void mousePressed(MouseEvent e) {
            System.out.println("Mouse Pressed");
            writer.println(EnumCommands1.PRESS_MOUSE.getAbbrev1());
            int button = e.getButton();
            int xButton = 16;
            if (button == 3) {
                  xButton = 4;
            }
            writer.println(xButton);
            writer.flush();
      }

      public void mouseReleased(MouseEvent e) {
            System.out.println("Mouse Released");
            writer.println(EnumCommands1.RELEASE_MOUSE.getAbbrev1());
            int button = e.getButton();
            int xButton = 16;
            if (button == 3) {
                  xButton = 4;
            }
            writer.println(xButton);
            writer.flush();
      }

      //not implemented
      public void mouseEntered(MouseEvent e) {
      }

      //not implemented
      public void mouseExited(MouseEvent e) {

      }

      //not implemented
      public void keyTyped(KeyEvent e) {
      }

      public void keyPressed(KeyEvent e) {
            System.out.println("Key Pressed");
            writer.println(EnumCommands1.PRESS_KEY.getAbbrev1());
            writer.println(e.getKeyCode());
            writer.flush();
      }

      public void keyReleased(KeyEvent e) {
            System.out.println("Mouse Released");
            writer.println(EnumCommands1.RELEASE_KEY.getAbbrev1());
            writer.println(e.getKeyCode());
            writer.flush();
      }

}