JInternalFrame listeners stops working if more than one opened ?

Question

Hi all, I'm trying to write some kind of chat program for my term project
I'm really stucked at this point.
I connect to a server, get chat room lists, join to a chat room, there's no problem at this first chat room ( internalFrame ), everything is fine ( I can refresh user list with pressing F5, send messages through send message button ), when I join another chat room ( second internalFrame ), problems start to occur, I can refresh with pressing F5, but I cannot send messages to server, server recieves my messages as null messages, still I can send messages with the first internal frame I opened but cannot refresh with pressing F5 in the first frame !
here are my codes for certain parts
main class
public class ChatClientMain extends JFrame
                               implements ActionListener {
// items etc here
    public ChatClientMain() {
        super("project");
        connectedToServer=false;
        int inset = 50;
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds(inset, inset,
                  screenSize.width  - inset*2,
                  screenSize.height - inset*2);
        desktopPane = new JDesktopPane(); //a specialized layered pane
        setContentPane(desktopPane);
        desktopPane.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
    public void actionPerformed(ActionEvent event)
       if ( event.getSource() == connectMenuItem )
                   try
                        connectionSocket = new Socket(serverName,serverPort);
                                inFromServer = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
                        outToServer = new PrintStream(connectionSocket.getOutputStream());
                   catch (IOException e)
                        JOptionPane.showMessageDialog(null, "Cannot connect to server\nProgram will exit", "Cannot connect", JOptionPane.ERROR_MESSAGE);
                        e.printStackTrace();
                        System.exit(1);
                   createServerFrame(outToServer);
                   new ConnectionToServer(nickName,connectionSocket,inFromServer,outToServer).start();
                // other actions etc.
    protected static void createChatFrame(String roomName)
        ChatFrame frame = new ChatFrame(roomName);
        frame.setVisible(true);
        desktopPane.add(frame);
        try
            frame.setSelected(true);
        catch (java.beans.PropertyVetoException e) {}
        outToServer.println("GET USER LIST"+roomName);
here's thread for connection to server
public class ConnectionToServer extends Thread
     public ConnectionToServer(String nick,Socket socket,BufferedReader bf,PrintStream ps)
          nickName=nick;
          inFromServer = bf;
          outToServer = ps;
          connectionSocket=socket;
          ChatClientMain.connectedToServer=true;
          outToServer.println("CONNECTION INITIALIZATION"+nickName);
     public void run()
          try
               while(true)
                    recievedMessage = inFromServer.readLine();
                    System.out.println(recievedMessage);
                    if (recievedMessage.startsWith("CHATROOM")) // problem here ( in split function ), cannot parse since recieves null message
                         String[] chatRoomMessageParts = recievedMessage.split("#");
                         String chatRoomName = chatRoomMessageParts[1];
                         String chatRoomMessage = chatRoomMessageParts[2];
                         System.out.println("room name : " + chatRoomName + " message : " + chatRoomMessage);
                                //some other protocols I implemented here
                    if (!roomListRecieving || ! userListRecieving)
                         ServerFrame.serverConversation.append(recievedMessage + "\n");
          catch (IOException e)
               e.printStackTrace();
code for chat frame, which works for one, but not for two :S
public class ChatFrame extends JInternalFrame
     private static final long serialVersionUID = 1L;
     static int openFrameCount = 0;
     static int xOffset = 60;
     static int yOffset = 60;
     JPanel chatRoomContent;
     JLabel chatRoom;
     JLabel users;
     JTextArea roomConversation;
     static JList roomUserList;
     JScrollPane conversationScroll;
     JScrollPane userListScroll;
     JTextField roomMessage;
     JButton roomMessageButton;
     static DefaultListModel userListModel;
     ListSelectionListener userListListener;
     public ChatFrame(final String roomName)
          super("Chat Room : " + roomName,
                    true, //resizable
                    true, //closable
                    true, //maximizable
                    true);//iconifiable
          openFrameCount++;
          chatRoomContent = new JPanel();
          chatRoomContent.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
          chatRoomContent.setLayout(new GridBagLayout());
          GridBagConstraints c = new GridBagConstraints();
          c.fill = GridBagConstraints.BOTH;
// I set proper values for c everytime I add new item to pane
          chatRoom = new JLabel("Now chatting in : " + roomName);
          chatRoomContent.add(chatRoom,c);
          users = new JLabel("User List");
          chatRoomContent.add(users,c);
          roomConversation = new JTextArea();
          roomConversation.setEditable(false);
          conversationScroll = new JScrollPane();
          conversationScroll.setViewportView(roomConversation);
          chatRoomContent.add(conversationScroll,c);
          userListModel = new DefaultListModel();
          userListListener = new ListSelectionListener(){
               public void valueChanged(ListSelectionEvent event) {
                    JList lsm = (JList) event.getSource();
                    if(event.getValueIsAdjusting())
                         roomConversation.append("Starting chat with " + lsm.getSelectedValue() + "\n");
                         String chatName = (String) lsm.getSelectedValue();
                         ChatClientMain.createPrivateChatFrame(chatName);
          roomUserList = new JList();
//list props set here
          chatRoomContent.add(userListScroll,c);
          roomMessage = new JTextField();
          chatRoomContent.add(roomMessage,c);
          roomMessageButton = new JButton("Send Message");
          roomMessageButton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent event) {
                    if (!roomMessage.getText().equals(""))
                         String message = ChatClientMain.nickName + " : " + roomMessage.getText() + "\n"; // message person wrote
                         roomConversation.append(message);
                         roomMessage.setText("");
                         ChatClientMain.outToServer.println("CHATROOM#"+roomName+"#"+message);  // message I'm sending to server
          chatRoomContent.add(roomMessageButton,c);
          this.setFocusable(true);
          this.addKeyListener(new KeyListener() {
               @Override
               public void keyPressed(KeyEvent arg0) {
                    int keyNo = arg0.getKeyCode();
                    if ( keyNo == KeyEvent.VK_F5)
                         ChatClientMain.outToServer.println("GET USER LIST"+roomName);       //refresh part with works just for the last internal frame I opened
               //other methods
          this.addInternalFrameListener(new InternalFrameListener() {
               public void internalFrameClosed(InternalFrameEvent arg0) {
                    ChatClientMain.leaveRoom(roomName);
                        //other methods here
          add(chatRoomContent);
          setSize(525,525);
          setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}I would really be thankful if you help..

Answer 1

Hi all, I'm trying to write some kind of chat program for my term project
I'm really stucked at this point.
I connect to a server, get chat room lists, join to a chat room, there's no problem at this first chat room ( internalFrame ), everything is fine ( I can refresh user list with pressing F5, send messages through send message button ), when I join another chat room ( second internalFrame ), problems start to occur, I can refresh with pressing F5, but I cannot send messages to server, server recieves my messages as null messages, still I can send messages with the first internal frame I opened but cannot refresh with pressing F5 in the first frame !
here are my codes for certain parts
main class
public class ChatClientMain extends JFrame
                               implements ActionListener {
// items etc here
    public ChatClientMain() {
        super("project");
        connectedToServer=false;
        int inset = 50;
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds(inset, inset,
                  screenSize.width  - inset*2,
                  screenSize.height - inset*2);
        desktopPane = new JDesktopPane(); //a specialized layered pane
        setContentPane(desktopPane);
        desktopPane.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
    public void actionPerformed(ActionEvent event)
       if ( event.getSource() == connectMenuItem )
                   try
                        connectionSocket = new Socket(serverName,serverPort);
                                inFromServer = new BufferedReader(new InputStreamReader(connectionSocket.getInputStream()));
                        outToServer = new PrintStream(connectionSocket.getOutputStream());
                   catch (IOException e)
                        JOptionPane.showMessageDialog(null, "Cannot connect to server\nProgram will exit", "Cannot connect", JOptionPane.ERROR_MESSAGE);
                        e.printStackTrace();
                        System.exit(1);
                   createServerFrame(outToServer);
                   new ConnectionToServer(nickName,connectionSocket,inFromServer,outToServer).start();
                // other actions etc.
    protected static void createChatFrame(String roomName)
        ChatFrame frame = new ChatFrame(roomName);
        frame.setVisible(true);
        desktopPane.add(frame);
        try
            frame.setSelected(true);
        catch (java.beans.PropertyVetoException e) {}
        outToServer.println("GET USER LIST"+roomName);
here's thread for connection to server
public class ConnectionToServer extends Thread
     public ConnectionToServer(String nick,Socket socket,BufferedReader bf,PrintStream ps)
          nickName=nick;
          inFromServer = bf;
          outToServer = ps;
          connectionSocket=socket;
          ChatClientMain.connectedToServer=true;
          outToServer.println("CONNECTION INITIALIZATION"+nickName);
     public void run()
          try
               while(true)
                    recievedMessage = inFromServer.readLine();
                    System.out.println(recievedMessage);
                    if (recievedMessage.startsWith("CHATROOM")) // problem here ( in split function ), cannot parse since recieves null message
                         String[] chatRoomMessageParts = recievedMessage.split("#");
                         String chatRoomName = chatRoomMessageParts[1];
                         String chatRoomMessage = chatRoomMessageParts[2];
                         System.out.println("room name : " + chatRoomName + " message : " + chatRoomMessage);
                                //some other protocols I implemented here
                    if (!roomListRecieving || ! userListRecieving)
                         ServerFrame.serverConversation.append(recievedMessage + "\n");
          catch (IOException e)
               e.printStackTrace();
code for chat frame, which works for one, but not for two :S
public class ChatFrame extends JInternalFrame
     private static final long serialVersionUID = 1L;
     static int openFrameCount = 0;
     static int xOffset = 60;
     static int yOffset = 60;
     JPanel chatRoomContent;
     JLabel chatRoom;
     JLabel users;
     JTextArea roomConversation;
     static JList roomUserList;
     JScrollPane conversationScroll;
     JScrollPane userListScroll;
     JTextField roomMessage;
     JButton roomMessageButton;
     static DefaultListModel userListModel;
     ListSelectionListener userListListener;
     public ChatFrame(final String roomName)
          super("Chat Room : " + roomName,
                    true, //resizable
                    true, //closable
                    true, //maximizable
                    true);//iconifiable
          openFrameCount++;
          chatRoomContent = new JPanel();
          chatRoomContent.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
          chatRoomContent.setLayout(new GridBagLayout());
          GridBagConstraints c = new GridBagConstraints();
          c.fill = GridBagConstraints.BOTH;
// I set proper values for c everytime I add new item to pane
          chatRoom = new JLabel("Now chatting in : " + roomName);
          chatRoomContent.add(chatRoom,c);
          users = new JLabel("User List");
          chatRoomContent.add(users,c);
          roomConversation = new JTextArea();
          roomConversation.setEditable(false);
          conversationScroll = new JScrollPane();
          conversationScroll.setViewportView(roomConversation);
          chatRoomContent.add(conversationScroll,c);
          userListModel = new DefaultListModel();
          userListListener = new ListSelectionListener(){
               public void valueChanged(ListSelectionEvent event) {
                    JList lsm = (JList) event.getSource();
                    if(event.getValueIsAdjusting())
                         roomConversation.append("Starting chat with " + lsm.getSelectedValue() + "\n");
                         String chatName = (String) lsm.getSelectedValue();
                         ChatClientMain.createPrivateChatFrame(chatName);
          roomUserList = new JList();
//list props set here
          chatRoomContent.add(userListScroll,c);
          roomMessage = new JTextField();
          chatRoomContent.add(roomMessage,c);
          roomMessageButton = new JButton("Send Message");
          roomMessageButton.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent event) {
                    if (!roomMessage.getText().equals(""))
                         String message = ChatClientMain.nickName + " : " + roomMessage.getText() + "\n"; // message person wrote
                         roomConversation.append(message);
                         roomMessage.setText("");
                         ChatClientMain.outToServer.println("CHATROOM#"+roomName+"#"+message);  // message I'm sending to server
          chatRoomContent.add(roomMessageButton,c);
          this.setFocusable(true);
          this.addKeyListener(new KeyListener() {
               @Override
               public void keyPressed(KeyEvent arg0) {
                    int keyNo = arg0.getKeyCode();
                    if ( keyNo == KeyEvent.VK_F5)
                         ChatClientMain.outToServer.println("GET USER LIST"+roomName);       //refresh part with works just for the last internal frame I opened
               //other methods
          this.addInternalFrameListener(new InternalFrameListener() {
               public void internalFrameClosed(InternalFrameEvent arg0) {
                    ChatClientMain.leaveRoom(roomName);
                        //other methods here
          add(chatRoomContent);
          setSize(525,525);
          setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}I would really be thankful if you help..