What is the error with this code ??

i'm trying to execute the following AS3 code:
var itemsArr:Array = new Array ();
var i:int; 
      var loaderAds:URLLoader = new URLLoader();
      loaderAds.load(new URLRequest("ads.txt"));   
      loaderAds.addEventListener(Event.COMPLETE, completeHandlerAds);
      function completeHandlerAds(eventAds:Event):void {
          var loaderAds:URLLoader = URLLoader(eventAds.target);
          var varsAds:URLVariables = new URLVariables(loaderAds.data);
            itemsArr = varsAds.names.split(";");
                    for (i = 0; i < (itemsArr.length); i++) { 
                            trace("itemsArr, Processing: " + itemsArr[i]);
       var loaderProps:URLLoader = new URLLoader();
      loaderProps.load(new URLRequest(itemsArr[i]+".txt"));   
      loaderProps.addEventListener(Event.COMPLETE, completeHandlerProps);
      trace("one: " + itemsArr[i]);
      function completeHandlerProps(eventProps:Event):void {
              trace("two: " + itemsArr[i]);
      }// end of fn for props
                    }//end of "for" loop of ads names
        }//end of fn for ads names
But i get the following output:
adsNames Array: ad0,ad1
adsNames, Processing: ad0
ad0
adsNames, Processing: ad1
ad1
null
TypeError: Error #2007: Parameter name must be non-null.
     at flash.display::DisplayObject/set name()
     at MethodInfo-279()
     at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunctio  n()
     at flash.events::EventDispatcher/dispatchEvent()
     at flash.net::URLLoader/flash.net:URLLoader::onComplete()
null
TypeError: Error #2007: Parameter name must be non-null.
     at flash.display::DisplayObject/set name()
     at MethodInfo-279()
     at flash.events::EventDispatcher/flash.events:EventDispatcher::dispatchEventFunctio  n()
     at flash.events::EventDispatcher/dispatchEvent()
     at flash.net::URLLoader/flash.net:URLLoader::onComplete()
As you see, the "red text" is errors, Can you tell me the reason for it ?
And also, tracing "itemsArr[i]" in the second time, always give "null", also in the first time, it give the correct value, Why ?

the red text not appear after i posted the topic, but you can see the errors on the output
and, you've to create to text files, first called "ads.txt" and put in it "names=ad0;ad1"
second one called "ad0.txt" and put anything in it, and another called "ad1.txt" and put anything in it
all these files should be in the same dir of flash file

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    public void setAudioStream(ByteArrayOutputStream out)
    this.out=out;               
    private void addMenu()
         JMenuBar mbar=new JMenuBar();
         mbar.setVisible(true);
         mbar.setBounds(0,0,500,20);
         mbar.setBackground(java.awt.Color.gray);
         //first menu
         JMenu m1=new JMenu("Connection");
         m1.setBounds(0,0,80,20);
         m1.setBackground(java.awt.Color.gray);
         JMenuItem mitem1=new JMenuItem("Connect");
         JMenuItem mitem2=new JMenuItem("Disconnect");
         m1.add(mitem1);
         m1.add(mitem2);
         mitem1.addActionListener(new ButtonHandler());
         mitem2.addActionListener(new ButtonHandler());
         mbar.add(m1);
         //second menu
         JMenu m2=new JMenu("Send...");
         m2.setBounds(90,0,80,20);
         m2.setBackground(java.awt.Color.gray);
         JMenuItem mitem3=new JMenuItem("Send");
         JMenuItem mitem4=new JMenuItem("Send with Audio...");
         mitem3.addActionListener(new ButtonHandler());
         mitem4.addActionListener(new ButtonHandler());
         m2.add(mitem3);
         m2.add(mitem4);
         mbar.add(m2);
         cp.add(mbar);
    private void setTextPaneStyle()
    StyleContext stylecontext =StyleContext.getDefaultStyleContext();
    defstyle=stylecontext.getStyle(StyleContext.DEFAULT_STYLE);
    doc= textpanel.getStyledDocument();
    //style 1
    style= textpanel.addStyle("bold",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.blue);
    StyleConstants.setItalic(style, false);
    StyleConstants.setBold(style, true);
    StyleConstants.setFontSize(style,16);
    //style 2
    style= textpanel.addStyle("normal",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.black);
    StyleConstants.setItalic(style, false);
    StyleConstants.setBold(style, false);
    StyleConstants.setFontSize(style,14);      
    //style3
    style= textpanel.addStyle("attach",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.red);
    StyleConstants.setItalic(style, true);
    StyleConstants.setBold(style, false);
    StyleConstants.setFontSize(style,12);      
    //remote method called by server
    public void addClient(String alias,String group,JTree tree)
         //if old client remove old tree
         if(!alias.equals(""))
         cp.remove(this.jsp);
         //add new tree
         this.tree=tree;
         setTreeModel();
         getSound(2);
         if(!alias.equals(""))
         textArea2.append("\nNew Client:" + alias + "has joined");
         else
         textArea2.append("\nYou have been connected to the Server.");
         jsp=new JScrollPane(this.tree);
    jsp.setBounds(12,96,168,120);
         jsp.setBackground(java.awt.Color.lightGray);
    cp.add(jsp);
    this.tree.addMouseListener(new MouseHandler());
    //remote method called by server
    public void sendMessage(String str,Hashtable rfiles,String alias,String group) throws RemoteException
              receiveMessage(str,rfiles,alias,group);
    //remote method called by server
    public void removeClient(JTree tree,String alias,String group) throws RemoteException
    cp.remove(this.jsp);
    this.tree=tree;
    setTreeModel();
    getSound(3);
    jsp=new JScrollPane(this.tree);
    jsp.setBounds(12,96,168,120);
         jsp.setBackground(java.awt.Color.lightGray);
    cp.add(jsp);
    this.tree.addMouseListener(new MouseHandler());
    textArea2.append("\nClient:" + alias + "has disconnected");                          
    private void receiveMessage(String str,Hashtable rfiles,String alias,String group)
              boolean flag=true;
              UIManager.put("JFrame.activeTitleBackground", new Color(64,128,255));
    UIManager.put("JFrame.activeTitleForeground", Color.white);
    UIManager.put("JFrame.inactiveTitleBackground", new Color(128,128,128));
    UIManager.put("JFrame.inactiveTitleForeground", Color.black);
    SwingUtilities.updateComponentTreeUI(this);
              try{
              if(alias.equals(""))
         doc.insertString(doc.getLength(),"CHATMASTER>>",textpanel.getStyle("bold"));
              doc.insertString(doc.getLength(),str+ newline,textpanel.getStyle("normal"));
              else
              doc.insertString(doc.getLength(),alias + "@" + group + ">>",textpanel.getStyle("bold"));
              doc.insertString(doc.getLength(),str,textpanel.getStyle("normal"));
              //add files to textpanel
              if(rfiles!=null && rfiles.size()>0)
              doc.insertString(doc.getLength(),newline+"Attachments>>",textpanel.getStyle("attach"));
              showattach(rfiles);
              addtoList(rfiles);     
    doc.insertString(doc.getLength(),newline,textpanel.getStyle("normal"));
    catch(Exception e)
              e.printStackTrace();
              dialog.showMessageDialog(client,e.toString(),"Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
         cp.repaint();               
    protected boolean ContactServer(String alias,String servername,String group)
         try{
              //UnicastRemoteObject.exportObject(this);
              //server=(ServerInterface)Naming.lookup("//gpt02d05:5500/" + servername);
         //     server.notifyMe(this,alias,group);
              //change the settings of buttons
              button1.setEnabled(true);
              button2.setEnabled(true);
              button3.setLabel("Disconnect");
              label8.setVisible(true);
              label8.setText(" Welcome::" + alias);
              //putting values of alias and group for sending messages
              fromalias=alias;
              fromgroup=group;
              CONNECT=true;
              return true;
         catch(UnsupportedOperationException e)
         dialog.showMessageDialog(client,"Client with the Same Alias in " + group + " already exists","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);                                   
         try{
              //     UnicastRemoteObject.unexportObject(client,true);
              catch(Exception ev){System.out.println(ev.toString());}     
         catch(Exception e)
              dialog.showMessageDialog(client,"Unable to connect to Server","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
              try{
              //     UnicastRemoteObject.unexportObject(client,true);
              catch(Exception ev){System.out.println(ev.toString());}     
         return false;      
    public static void main(String args[]) throws RemoteException{
         client=new Client();          
    }//main ends
    public void getSound(int count)
         Toolkit t1=getToolkit();
              for(int i=0;i<count;i++)
              t1.beep();
              try{
                   Thread.sleep(500);
              catch(Exception e){}
    public void setTreeModel()
    ImageIcon i1=new ImageIcon("Lock.gif","No Users");
    ImageIcon i2=new ImageIcon("Connec.gif","Users in Group");
    ImageIcon i3=new ImageIcon("authorbn.gif","An User");
    DefaultTreeCellRenderer dr1= new DefaultTreeCellRenderer();
    dr1.setClosedIcon(i1);
    dr1.setOpenIcon(i2);
    dr1.setLeafIcon(i3);
    dr1.setTextSelectionColor(java.awt.Color.red);
    tree.setCellRenderer(dr1);
    //add received files to the list
    private void addtoList(Hashtable rfiles)
    Enumeration filelist=rfiles.keys();          
    while(filelist.hasMoreElements())          
    File file=(File)filelist.nextElement();
    this.rfiles.put(file,rfiles.get(file));               
    //show the attachments received               
    private void showattach(Hashtable rfiles)
    Enumeration filelist=rfiles.keys();
    dsource=DragSource.getDefaultDragSource();
    JButton b1=null;
    while(filelist.hasMoreElements())
         File file=(File)filelist.nextElement();
         Icon icon=chooser.getIcon(file);
         b1=new JButton(icon);
         b1.setBackground(java.awt.Color.gray);
    b1.setToolTipText(file.getName());
    b1.addMouseListener(new AttachmentHandler());
    Dimension d1=new Dimension(icon.getIconWidth(),icon.getIconHeight());
    b1.setMaximumSize(d1);
    hfiles.put(b1,file);
    textpanel.setCaretPosition(doc.getLength());
    textpanel.insertComponent(b1);
    b1.setSize(icon.getIconWidth(),icon.getIconHeight());
    dsource.createDefaultDragGestureRecognizer(b1, DnDConstants.ACTION_COPY_OR_MOVE,new DragGestureHandler());           
    cp.repaint();
    private void savefile(File file,Object parent)
    //ExtensionFileFilter filter = new ExtensionFileFilter(false);
    //filter.addExtension("txt",true);
    //chooser.setFileFilter(filter);
    int returnVal = chooser.showSaveDialog(client);
    if(returnVal ==JFileChooser.APPROVE_OPTION)
         try{
         FileOutputStream fstream=new FileOutputStream(chooser.getSelectedFile());
         //decide whether the file received or sent is to be saved
         if(((Container)parent).equals(textArea1))
         fstream.write((byte[])files.get(file));
         else
         fstream.write((byte[])rfiles.get(file));
         fstream.close();
         System.out.println(file.getName());          
         catch(Exception e)
         {System.out.println(e.toString()); }
    private void openfile(File file,Object parent)
         File tempfile=null;
         try{
         String fname=file.getName();     
         tempfile=File.createTempFile("temp",fname.substring(fname.lastIndexOf(".")));     
         FileOutputStream fstream=new FileOutputStream(tempfile);
         System.out.println(tempfile.getAbsolutePath());
         //decide whether the file received or sent is to be saved
         if(((Container)parent).equals(textArea1))
         fstream.write((byte[])files.get(file));
         else
         fstream.write((byte[])rfiles.get(file));          
         fstream.close();
    catch(Exception e){System.out.println(e.toString());}
    try{
         Process p1=r1.exec("cmd /c start " + tempfile.getAbsolutePath());
         p1.waitFor();
    catch(Exception e){System.out.println(e.toString());}     
    //inner classes
    class ComponentHandler implements ContainerListener{
    public void componentRemoved(ContainerEvent ev)     
              Container cont=(Container)ev.getChild();
              if(cont.getComponentCount()>0)
              JButton but=(JButton)cont.getComponent(0);
              files.remove((File)hfiles.get(but));
              hfiles.remove(but);
    public void componentAdded(ContainerEvent ev){}
    class AttachmentHandler extends MouseAdapter{
         public void mouseClicked(MouseEvent ev){
         if(ev.getModifiers()==4)
         Component comp=(Component)ev.getSource();
         File file=(File)hfiles.get(comp);
         popup=new JPopupMenu();
         JMenuItem popopen=new JMenuItem("Open");
         JMenuItem popsave=new JMenuItem("Save As..");
         popup.add(popopen);
         System.out.println(comp.getParent().getParent().getClass().toString());
         popopen.addActionListener(new ButtonHandler(file,comp.getParent().getParent()));
         popup.add(popsave);
         popsave.addActionListener(new ButtonHandler(file,comp.getParent().getParent()));
         popup.show(comp,12,12);
    class DragGestureHandler extends Vector implements DragGestureListener,DragSourceListener,Transferable{
    final static int FILE = 0;
    final static int STRING = 1;
    final static int PLAIN = 2;
    DataFlavor flavors[] = {DataFlavor.javaFileListFlavor,DataFlavor.stringFlavor,DataFlavor.plainTextFlavor};
    public void dragDropEnd(DragSourceDropEvent ev){}
    public void dragEnter(DragSourceDragEvent ev){}
    public void dragExit(DragSourceEvent ev){}
    public void dragOver(DragSourceDragEvent ev){}
    public void dropActionChanged(DragSourceDragEvent ev){}
    public void dragGestureRecognized(DragGestureEvent ev)     
              System.out.println("recognized");
              File file=(File)hfiles.get(ev.getComponent());
    addElement(file);
    ev.startDrag(DragSource.DefaultCopyDrop,this,this);
    /* Returns the array of flavors in which it can provide the data. */
    public synchronized DataFlavor[] getTransferDataFlavors() {
         return flavors;
    /* Returns whether the requested flavor is supported by this object. */
    public boolean isDataFlavorSupported(DataFlavor flavor) {
    boolean b = false;
    b |=flavor.equals(flavors[FILE]);
    b |= flavor.equals(flavors[STRING]);
    b |= flavor.equals(flavors[PLAIN]);
         return (b);
    public synchronized Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException,IOException
    if(flavor.equals(flavors[FILE])){return this;}
    else if (flavor.equals(flavors[PLAIN])) {
         return new StringReader(((File)elementAt(0)).getAbsolutePath());
         } else if (flavor.equals(flavors[STRING])) {
         return((File)elementAt(0)).getAbsolutePath();
         } else {
         throw new UnsupportedFlavorException(flavor);
    //inner class for draging in the files on java frame     
    class DragDropHandler implements DropTargetListener{
    public void dragEnter(DropTargetDragEvent ev){     
    public void dragExit(DropTargetEvent ev){
    public void dragOver(DropTargetDragEvent ev){
    public void drop(DropTargetDropEvent ev){
         Transferable tf1=ev.getTransferable();
         DataFlavor fl[]=ev.getCurrentDataFlavors();
         if(ev.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
         ev.acceptDrop (DnDConstants.ACTION_COPY_OR_MOVE);
         try{
         java.util.List fileList = (java.util.List)tf1.getTransferData(DataFlavor.javaFileListFlavor);
    Iterator iterator = fileList.iterator();
    while (iterator.hasNext())
    File file = (File)iterator.next();
    if(file.isFile())
    Icon icon=chooser.getIcon(file);
    FileInputStream fstream=new FileInputStream(file);
    int filedata=(new Double(file.length())).intValue();
    byte bytes[]=new byte[filedata];
    fstream.read(bytes);
    files.put(file,bytes);
    ev.getDropTargetContext().dropComplete(true);
    addAttach(fileList);
    catch(Exception e)
    {System.out.println(e.toString() + "here");}
    public void dropActionChanged(DropTargetDragEvent ev){
    class MouseHandler extends MouseAdapter{
    public void mouseClicked(MouseEvent me)
    TreePath tp=tree.getPathForLocation(me.getX(),me.getY());
    if(tp!=null)
         if(tp.getPathCount()==3)
              toalias=tp.getPathComponent(2).toString();
              togroup=tp.getPathComponent(1).toString();
              System.out.println(toalias);
              if (!(toalias.equals(fromalias) && togroup.equals(fromgroup)))
              System.out.println("hh " + toalias);
              label4.setText(tp.getPathComponent(2).toString() + "_@" + tp.getPathComponent(1).toString());           
    class ButtonHandler implements ActionListener{
         private File file;
         private Object parent;
         //constructors
         public ButtonHandler()
         public ButtonHandler(File file,Object parent)
              this.file=file;
              this.parent=parent;
         //other functions      
         public void actionPerformed(ActionEvent ev){
              String s=ev.getActionCommand();
         System.out.println(s);
              if(s.equals("Send with Audio..."))
              //Audio audio=new Audio(client,false,"CAPTURE");          
              if(s.equals("Disconnect"))
              try{
              // server.disconnect(client);
              client.getSound(3);
              cp.remove(jsp);
              label6.setVisible(false);
              //UnicastRemoteObject.unexportObject(client,true);
              button3.setLabel("Connect");
              textArea2.append("\nYou have been disconnected to Server");
              client.repaint();     
              catch(Exception e)
              System.out.println(e.toString());
              if(s.equals("Connect"))
         //     clp=new ClientProperties(client,false);
         if(s.equals("Save As.."))
         savefile(file,parent);     
         if(s.equals("Open"))
         openfile(file,parent);
              if(s.equals("Attach"))
              //ExtensionFileFilter filter = new ExtensionFileFilter(false);
              //filter.addExtension(".txt",true);
              //filter.setDescription("Text Files(.txt)");
              // chooser.setFileFilter(filter);
              chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
              //chooser.setMultiSelectionEnabled(true);
              int returnVal = chooser.showOpenDialog(client);
              if(returnVal ==JFileChooser.APPROVE_OPTION)
              //File fp[]=chooser.getSelectedFiles();
              File fp[]=new File[1];
              fp[0]=chooser.getSelectedFile();
              int i=0;
              while(i<fp.length)
              try{
              File file=fp;
              Icon icon=chooser.getIcon(file);
    FileInputStream fstream=new FileInputStream(file);
    int filedata=(new Double(file.length())).intValue();
    byte bytes[]=new byte[filedata];
    fstream.read(bytes);
    files.put(file,bytes);
    catch(Exception e){dialog.showMessageDialog(client,e.toString(),"Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    return; }
    i++;
              java.util.List fileList=Arrays.asList(fp);
              addAttach(fileList);
              if(s.equals("Send"))
              try{
                   if(toalias==null)
                   dialog.showMessageDialog(client,"Select the Recepient First!!","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
                   return;
                   if(toalias!=null && togroup!=null && (!toalias.equals(fromalias)))
                   // server.sendMessage(textArea1.getText(),files,toalias,togroup,fromalias,fromgroup);
                   textArea1.setText("");
              catch(Exception e)
         e.printStackTrace();
    }//if ends
    class WindowEventHandler extends WindowAdapter{
         public void windowClosing(WindowEvent ev){
              try{
              //server.disconnect(client);
              client.getSound(3);
         //     UnicastRemoteObject.unexportObject(client,true);
              catch(Exception e){System.out.println(e.toString());}
              dispose();
    private class onshutdown extends Thread{
    public void run(){
         try{
              //server.disconnect(client);
              //UnicastRemoteObject.unexportObject(client,true);
              catch(Exception e){}      
    }//run ends          

    Here is the working code :
    There was an error line 724
    File file=fp; -> File file=fp[0];
    Several method were deprecated and try to replace the deprecated static field : DataFlavor.plainTextFlavor which was deprecated since 1.4.
    /* Client.java*/
    import java.util.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.rmi.*;
    import java.rmi.server.*;
    import javax.swing.*;
    import javax.swing.tree.*;
    import javax.swing.filechooser.*;
    import java.io.*;
    import java.awt.dnd.*;
    import java.awt.datatransfer.*;
    import javax.swing.plaf.*;
    import javax.swing.plaf.basic.*;
    import javax.swing.text.*;
    import javax.swing.event.*;
    public class Client extends JFrame{
    static String newline = System.getProperty("line.separator");
    static Client client;
    //ServerInterface server;
    //ClientProperties clp;
    Vector v1=new Vector();
    ByteArrayOutputStream out;
    Runtime r1;
    //file objects,together with array of bytes
    Hashtable files=new Hashtable(); //files sent
    Hashtable rfiles=new Hashtable(); //files received
    //file objects,together with button handlers
    Hashtable hfiles=new Hashtable(); //files sent,files received
    JButton button1=new JButton();
    JButton button2=new JButton();
    JButton button3=new JButton();
    JLabel label1=new JLabel();
    JLabel label2=new JLabel();
    JLabel label3=new JLabel();
    JLabel label4=new JLabel();
    JLabel label5=new JLabel();
    JLabel label6=new JLabel();
    JLabel label7=new JLabel();
    JLabel label8=new JLabel();
    JOptionPane dialog=new JOptionPane();
    JFileChooser chooser = new JFileChooser();
    JPanel panel1;
    JPanel panel2;
    DropTarget dtarget;
    DragSource dsource;
    JTextPane textArea1=new JTextPane();
    TextArea textArea2=new TextArea();
    JTextPane textpanel=new JTextPane();
    Style defstyle,style;
    StyledDocument doc,doc1;
    JPopupMenu popup;
    JTree tree;
    JScrollPane jsppane;
    JScrollPane jsp,jsp2;
    DefaultMutableTreeNode top;
    Container cp;
    private String toalias;
    private String togroup;
    private String fromalias;
    private String fromgroup;
    private boolean CONNECT;
    public Client()
    cp=getContentPane();
    cp.setLayout(null);
    setForeground(java.awt.Color.red);
    setFont(new Font("Dialog", Font.PLAIN, 14));
    setVisible(false);
    label1.setText(" CHAT APPLICATION");
    cp.add(label1);
    label1.setFont(new Font("Dialog", Font.BOLD, 16));
    label1.setBounds(72,20,319,30);
    label2.setText("List of Users Connected.");
    cp.add(label2);
    label2.setForeground(java.awt.Color.blue);
    label2.setFont(new Font("Dialog", Font.BOLD, 12));
    label2.setBounds(24,60,192,26);
    label8.setBounds(280,60,100,26);
    cp.add(label8);
    cp.add(textArea2);
    textArea2.setBounds(204,120,268,90);
    jsppane=new JScrollPane(textArea1);
    doc1=textArea1.getStyledDocument();
    jsppane.setBounds(12,264,456,109);
    cp.add(jsppane);
    label3.setText("TO::");
    cp.add(label3);
    label3.setFont(new Font("Dialog", Font.BOLD, 12));
    label3.setBounds(12,228,36,20);
    cp.add(label4);
    label4.setBackground(java.awt.Color.lightGray);
    label4.setBounds(60,228,172,19);
    label5.setText("SERVER RESPONSE");
    cp.add(label5);
    label5.setFont(new Font("Dialog", Font.BOLD, 12));
    label5.setBounds(204,96,204,21);
    label7.setText("MESSAGE FOR YOU.");
    cp.add(label7);
    label7.setFont(new Font("Dialog", Font.BOLD, 14));
    label7.setBounds(12,371,288,25);
    jsp2=new JScrollPane(textpanel);
    setTextPaneStyle();
    jsp2.setBounds(12,401,456,109);
    cp.add(jsp2);
    button1.setText("Send");
    button1.setEnabled(false);
    cp.add(button1);
    button1.setBackground(java.awt.Color.lightGray);
    button1.setForeground(java.awt.Color.black);
    button1.setFont(new Font("Dialog", Font.BOLD|Font.ITALIC, 10));
    button1.setBounds(60,520,78,36);
    button2.setText("Attach");
    //button2.setEnabled(false);
    cp.add(button2);
    button2.setBackground(java.awt.Color.lightGray);
    button2.setForeground(java.awt.Color.black);
    button2.setFont(new Font("Dialog", Font.BOLD|Font.ITALIC, 10));
    button2.setBounds(180,520,72,36);
    button3.setText("Connect");
    cp.add(button3);
    button3.setBackground(java.awt.Color.lightGray);
    button3.setForeground(java.awt.Color.black);
    button3.setFont(new Font("Dialog", Font.BOLD|Font.ITALIC, 10));
    button3.setBounds(288,520,72,33);
    setSize(500,620);
    show();
    addWindowListener(new WindowEventHandler());
    button1.addActionListener(new ButtonHandler());
    button2.addActionListener(new ButtonHandler());
    button3.addActionListener(new ButtonHandler());
    textArea1.addContainerListener(new ComponentHandler());
    dtarget=new DropTarget(textArea1,new DragDropHandler());
    textArea2.setEnabled(false);
    textpanel.setEnabled(false);
    r1=Runtime.getRuntime();
    r1.addShutdownHook(new onshutdown());
    addMenu();
    cp.repaint();
    //adds attachments to the textArea1
    synchronized private void addAttach(java.util.List fileList)
    Iterator iterator=fileList.iterator();
    JButton bw;
    while(iterator.hasNext())
    File file=(File)iterator.next();
    Icon icon=chooser.getIcon(file);
    bw=new JButton(icon);
    bw.setBackground(java.awt.Color.gray);
    bw.setToolTipText(file.getAbsolutePath());
    bw.addMouseListener(new AttachmentHandler());
    Dimension d1=new Dimension(icon.getIconWidth(),icon.getIconHeight());
    bw.setMaximumSize(d1);
    hfiles.put(bw,file);
    textArea1.insertComponent(bw);
    textArea1.setCaretPosition(doc1.getLength());
    bw.setSize(icon.getIconWidth(),icon.getIconHeight());
    //only one file at a time
    break;
    cp.repaint();
    public void setAudioStream(ByteArrayOutputStream out)
    this.out=out;
    private void addMenu()
    JMenuBar mbar=new JMenuBar();
    mbar.setVisible(true);
    mbar.setBounds(0,0,500,20);
    mbar.setBackground(java.awt.Color.gray);
    //first menu
    JMenu m1=new JMenu("Connection");
    m1.setBounds(0,0,80,20);
    m1.setBackground(java.awt.Color.gray);
    JMenuItem mitem1=new JMenuItem("Connect");
    JMenuItem mitem2=new JMenuItem("Disconnect");
    m1.add(mitem1);
    m1.add(mitem2);
    mitem1.addActionListener(new ButtonHandler());
    mitem2.addActionListener(new ButtonHandler());
    mbar.add(m1);
    //second menu
    JMenu m2=new JMenu("Send...");
    m2.setBounds(90,0,80,20);
    m2.setBackground(java.awt.Color.gray);
    JMenuItem mitem3=new JMenuItem("Send");
    JMenuItem mitem4=new JMenuItem("Send with Audio...");
    mitem3.addActionListener(new ButtonHandler());
    mitem4.addActionListener(new ButtonHandler());
    m2.add(mitem3);
    m2.add(mitem4);
    mbar.add(m2);
    cp.add(mbar);
    private void setTextPaneStyle()
    StyleContext stylecontext =StyleContext.getDefaultStyleContext();
    defstyle=stylecontext.getStyle(StyleContext.DEFAULT_STYLE);
    doc= textpanel.getStyledDocument();
    //style 1
    style= textpanel.addStyle("bold",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.blue);
    StyleConstants.setItalic(style, false);
    StyleConstants.setBold(style, true);
    StyleConstants.setFontSize(style,16);
    //style 2
    style= textpanel.addStyle("normal",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.black);
    StyleConstants.setItalic(style, false);
    StyleConstants.setBold(style, false);
    StyleConstants.setFontSize(style,14);
    //style3
    style= textpanel.addStyle("attach",defstyle);
    StyleConstants.setBackground(style,Color.white);
    StyleConstants.setForeground(style,Color.red);
    StyleConstants.setItalic(style, true);
    StyleConstants.setBold(style, false);
    StyleConstants.setFontSize(style,12);
    //remote method called by server
    public void addClient(String alias,String group,JTree tree)
    //if old client remove old tree
    if(!alias.equals(""))
    cp.remove(this.jsp);
    //add new tree
    this.tree=tree;
    setTreeModel();
    getSound(2);
    if(!alias.equals(""))
    textArea2.append("\nNew Client:" + alias + "has joined");
    else
    textArea2.append("\nYou have been connected to the Server.");
    jsp=new JScrollPane(this.tree);
    jsp.setBounds(12,96,168,120);
    jsp.setBackground(java.awt.Color.lightGray);
    cp.add(jsp);
    this.tree.addMouseListener(new MouseHandler());
    //remote method called by server
    public void sendMessage(String str,Hashtable rfiles,String alias,String group) throws RemoteException
    receiveMessage(str,rfiles,alias,group);
    //remote method called by server
    public void removeClient(JTree tree,String alias,String group) throws RemoteException
    cp.remove(this.jsp);
    this.tree=tree;
    setTreeModel();
    getSound(3);
    jsp=new JScrollPane(this.tree);
    jsp.setBounds(12,96,168,120);
    jsp.setBackground(java.awt.Color.lightGray);
    cp.add(jsp);
    this.tree.addMouseListener(new MouseHandler());
    textArea2.append("\nClient:" + alias + "has disconnected");
    private void receiveMessage(String str,Hashtable rfiles,String alias,String group)
    boolean flag=true;
    UIManager.put("JFrame.activeTitleBackground", new Color(64,128,255));
    UIManager.put("JFrame.activeTitleForeground", Color.white);
    UIManager.put("JFrame.inactiveTitleBackground", new Color(128,128,128));
    UIManager.put("JFrame.inactiveTitleForeground", Color.black);
    SwingUtilities.updateComponentTreeUI(this);
    try{
    if(alias.equals(""))
    doc.insertString(doc.getLength(),"CHATMASTER>>",textpanel.getStyle("bold"));
    doc.insertString(doc.getLength(),str+ newline,textpanel.getStyle("normal"));
    else
    doc.insertString(doc.getLength(),alias + "@" + group + ">>",textpanel.getStyle("bold"));
    doc.insertString(doc.getLength(),str,textpanel.getStyle("normal"));
    //add files to textpanel
    if(rfiles!=null && rfiles.size()>0)
    doc.insertString(doc.getLength(),newline+"Attachments>>",textpanel.getStyle("attach"));
    showattach(rfiles);
    addtoList(rfiles);
    doc.insertString(doc.getLength(),newline,textpanel.getStyle("normal"));
    catch(Exception e)
    e.printStackTrace();
    dialog.showMessageDialog(client,e.toString(),"Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    cp.repaint();
    protected boolean ContactServer(String alias,String servername,String group)
    try{
    //UnicastRemoteObject.exportObject(this);
    //server=(ServerInterface)Naming.lookup("//gpt02d05:5500/" + servername);
    // server.notifyMe(this,alias,group);
    //change the settings of buttons
    button1.setEnabled(true);
    button2.setEnabled(true);
    button3.setText("Disconnect");
    label8.setVisible(true);
    label8.setText(" Welcome::" + alias);
    //putting values of alias and group for sending messages
    fromalias=alias;
    fromgroup=group;
    CONNECT=true;
    return true;
    catch(UnsupportedOperationException e)
    dialog.showMessageDialog(client,"Client with the Same Alias in " + group + " already exists","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    try{
    // UnicastRemoteObject.unexportObject(client,true);
    catch(Exception ev){System.out.println(ev.toString());}
    catch(Exception e)
    dialog.showMessageDialog(client,"Unable to connect to Server","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    try{
    // UnicastRemoteObject.unexportObject(client,true);
    catch(Exception ev){System.out.println(ev.toString());}
    return false;
    public static void main(String args[]) throws RemoteException{
    client=new Client();
    }//main ends
    public void getSound(int count)
    Toolkit t1=getToolkit();
    for(int i=0;i<count;i++)
    t1.beep();
    try{
    Thread.sleep(500);
    catch(Exception e){}
    public void setTreeModel()
    ImageIcon i1=new ImageIcon("Lock.gif","No Users");
    ImageIcon i2=new ImageIcon("Connec.gif","Users in Group");
    ImageIcon i3=new ImageIcon("authorbn.gif","An User");
    DefaultTreeCellRenderer dr1= new DefaultTreeCellRenderer();
    dr1.setClosedIcon(i1);
    dr1.setOpenIcon(i2);
    dr1.setLeafIcon(i3);
    dr1.setTextSelectionColor(java.awt.Color.red);
    tree.setCellRenderer(dr1);
    //add received files to the list
    private void addtoList(Hashtable rfiles)
    Enumeration filelist=rfiles.keys();
    while(filelist.hasMoreElements())
    File file=(File)filelist.nextElement();
    this.rfiles.put(file,rfiles.get(file));
    //show the attachments received
    private void showattach(Hashtable rfiles)
    Enumeration filelist=rfiles.keys();
    dsource=DragSource.getDefaultDragSource();
    JButton b1=null;
    while(filelist.hasMoreElements())
    File file=(File)filelist.nextElement();
    Icon icon=chooser.getIcon(file);
    b1=new JButton(icon);
    b1.setBackground(java.awt.Color.gray);
    b1.setToolTipText(file.getName());
    b1.addMouseListener(new AttachmentHandler());
    Dimension d1=new Dimension(icon.getIconWidth(),icon.getIconHeight());
    b1.setMaximumSize(d1);
    hfiles.put(b1,file);
    textpanel.setCaretPosition(doc.getLength());
    textpanel.insertComponent(b1);
    b1.setSize(icon.getIconWidth(),icon.getIconHeight());
    dsource.createDefaultDragGestureRecognizer(b1, DnDConstants.ACTION_COPY_OR_MOVE,new DragGestureHandler());
    cp.repaint();
    private void savefile(File file,Object parent)
    //ExtensionFileFilter filter = new ExtensionFileFilter(false);
    //filter.addExtension("txt",true);
    //chooser.setFileFilter(filter);
    int returnVal = chooser.showSaveDialog(client);
    if(returnVal ==JFileChooser.APPROVE_OPTION)
    try{
    FileOutputStream fstream=new FileOutputStream(chooser.getSelectedFile());
    //decide whether the file received or sent is to be saved
    if(((Container)parent).equals(textArea1))
    fstream.write((byte[])files.get(file));
    else
    fstream.write((byte[])rfiles.get(file));
    fstream.close();
    System.out.println(file.getName());
    catch(Exception e)
    {System.out.println(e.toString()); }
    private void openfile(File file,Object parent)
    File tempfile=null;
    try{
    String fname=file.getName();
    tempfile=File.createTempFile("temp",fname.substring(fname.lastIndexOf(".")));
    FileOutputStream fstream=new FileOutputStream(tempfile);
    System.out.println(tempfile.getAbsolutePath());
    //decide whether the file received or sent is to be saved
    if(((Container)parent).equals(textArea1))
    fstream.write((byte[])files.get(file));
    else
    fstream.write((byte[])rfiles.get(file));
    fstream.close();
    catch(Exception e){System.out.println(e.toString());}
    try{
    Process p1=r1.exec("cmd /c start " + tempfile.getAbsolutePath());
    p1.waitFor();
    catch(Exception e){System.out.println(e.toString());}
    //inner classes
    class ComponentHandler implements ContainerListener{
    public void componentRemoved(ContainerEvent ev)
    Container cont=(Container)ev.getChild();
    if(cont.getComponentCount()>0)
    JButton but=(JButton)cont.getComponent(0);
    files.remove((File)hfiles.get(but));
    hfiles.remove(but);
    public void componentAdded(ContainerEvent ev){}
    class AttachmentHandler extends MouseAdapter{
    public void mouseClicked(MouseEvent ev){
    if(ev.getModifiers()==4)
    Component comp=(Component)ev.getSource();
    File file=(File)hfiles.get(comp);
    popup=new JPopupMenu();
    JMenuItem popopen=new JMenuItem("Open");
    JMenuItem popsave=new JMenuItem("Save As..");
    popup.add(popopen);
    System.out.println(comp.getParent().getParent().getClass().toString());
    popopen.addActionListener(new ButtonHandler(file,comp.getParent().getParent()));
    popup.add(popsave);
    popsave.addActionListener(new ButtonHandler(file,comp.getParent().getParent()));
    popup.show(comp,12,12);
    class DragGestureHandler extends Vector implements DragGestureListener,DragSourceListener,Transferable{
    final static int FILE = 0;
    final static int STRING = 1;
    final static int PLAIN = 2;
    DataFlavor flavors[] = {DataFlavor.javaFileListFlavor,DataFlavor.stringFlavor,DataFlavor.plainTextFlavor};
    public void dragDropEnd(DragSourceDropEvent ev){}
    public void dragEnter(DragSourceDragEvent ev){}
    public void dragExit(DragSourceEvent ev){}
    public void dragOver(DragSourceDragEvent ev){}
    public void dropActionChanged(DragSourceDragEvent ev){}
    public void dragGestureRecognized(DragGestureEvent ev)
    System.out.println("recognized");
    File file=(File)hfiles.get(ev.getComponent());
    addElement(file);
    ev.startDrag(DragSource.DefaultCopyDrop,this,this);
    /* Returns the array of flavors in which it can provide the data. */
    public synchronized DataFlavor[] getTransferDataFlavors() {
    return flavors;
    /* Returns whether the requested flavor is supported by this object. */
    public boolean isDataFlavorSupported(DataFlavor flavor) {
    boolean b = false;
    b |=flavor.equals(flavors[FILE]);
    b |= flavor.equals(flavors[STRING]);
    b |= flavor.equals(flavors[PLAIN]);
    return (b);
    public synchronized Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException,IOException
    if(flavor.equals(flavors[FILE])){return this;}
    else if (flavor.equals(flavors[PLAIN])) {
    return new StringReader(((File)elementAt(0)).getAbsolutePath());
    } else if (flavor.equals(flavors[STRING])) {
    return((File)elementAt(0)).getAbsolutePath();
    } else {
    throw new UnsupportedFlavorException(flavor);
    //inner class for draging in the files on java frame
    class DragDropHandler implements DropTargetListener{
    public void dragEnter(DropTargetDragEvent ev){
    public void dragExit(DropTargetEvent ev){
    public void dragOver(DropTargetDragEvent ev){
    public void drop(DropTargetDropEvent ev){
    Transferable tf1=ev.getTransferable();
    DataFlavor fl[]=ev.getCurrentDataFlavors();
    if(ev.isDataFlavorSupported(DataFlavor.javaFileListFlavor))
    ev.acceptDrop (DnDConstants.ACTION_COPY_OR_MOVE);
    try{
    java.util.List fileList = (java.util.List)tf1.getTransferData(DataFlavor.javaFileListFlavor);
    Iterator iterator = fileList.iterator();
    while (iterator.hasNext())
    File file = (File)iterator.next();
    if(file.isFile())
    Icon icon=chooser.getIcon(file);
    FileInputStream fstream=new FileInputStream(file);
    int filedata=(new Double(file.length())).intValue();
    byte bytes[]=new byte[filedata];
    fstream.read(bytes);
    files.put(file,bytes);
    ev.getDropTargetContext().dropComplete(true);
    addAttach(fileList);
    catch(Exception e)
    {System.out.println(e.toString() + "here");}
    public void dropActionChanged(DropTargetDragEvent ev){
    class MouseHandler extends MouseAdapter{
    public void mouseClicked(MouseEvent me)
    TreePath tp=tree.getPathForLocation(me.getX(),me.getY());
    if(tp!=null)
    if(tp.getPathCount()==3)
    toalias=tp.getPathComponent(2).toString();
    togroup=tp.getPathComponent(1).toString();
    System.out.println(toalias);
    if (!(toalias.equals(fromalias) && togroup.equals(fromgroup)))
    System.out.println("hh " + toalias);
    label4.setText(tp.getPathComponent(2).toString() + "_@" + tp.getPathComponent(1).toString());
    class ButtonHandler implements ActionListener{
    private File file;
    private Object parent;
    //constructors
    public ButtonHandler()
    public ButtonHandler(File file,Object parent)
    this.file=file;
    this.parent=parent;
    //other functions
    public void actionPerformed(ActionEvent ev){
    String s=ev.getActionCommand();
    System.out.println(s);
    if(s.equals("Send with Audio..."))
    //Audio audio=new Audio(client,false,"CAPTURE");
    if(s.equals("Disconnect"))
    try{
    // server.disconnect(client);
    client.getSound(3);
    cp.remove(jsp);
    label6.setVisible(false);
    //UnicastRemoteObject.unexportObject(client,true);
    button3.setText("Connect");
    textArea2.append("\nYou have been disconnected to Server");
    client.repaint();
    catch(Exception e)
    System.out.println(e.toString());
    if(s.equals("Connect"))
    // clp=new ClientProperties(client,false);
    if(s.equals("Save As.."))
    savefile(file,parent);
    if(s.equals("Open"))
    openfile(file,parent);
    if(s.equals("Attach"))
    //ExtensionFileFilter filter = new ExtensionFileFilter(false);
    //filter.addExtension(".txt",true);
    //filter.setDescription("Text Files(.txt)");
    // chooser.setFileFilter(filter);
    chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
    //chooser.setMultiSelectionEnabled(true);
    int returnVal = chooser.showOpenDialog(client);
    if(returnVal ==JFileChooser.APPROVE_OPTION)
    //File fp[]=chooser.getSelectedFiles();
    File fp[]=new File[1];
    fp[0]=chooser.getSelectedFile();
    int i=0;
    while(i<fp.length)
    try{
    File file=fp[0];
    Icon icon=chooser.getIcon(file);
    FileInputStream fstream=new FileInputStream(file);
    int filedata=(new Double(file.length())).intValue();
    byte bytes[]=new byte[filedata];
    fstream.read(bytes);
    files.put(file,bytes);
    catch(Exception e){dialog.showMessageDialog(client,e.toString(),"Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    return; }
    i++;
    java.util.List fileList=Arrays.asList(fp);
    addAttach(fileList);
    if(s.equals("Send"))
    try{
    if(toalias==null)
    dialog.showMessageDialog(client,"Select the Recepient First!!","Error:ChatApplication",JOptionPane.ERROR_MESSAGE);
    return;
    if(toalias!=null && togroup!=null && (!toalias.equals(fromalias)))
    // server.sendMessage(textArea1.getText(),files,toalias,togroup,fromalias,fromgroup);
    textArea1.setText("");
    catch(Exception e)
    e.printStackTrace();
    }//if ends
    class WindowEventHandler extends WindowAdapter{
    public void windowClosing(WindowEvent ev){
    try{
    //server.disconnect(client);
    client.getSound(3);
    // UnicastRemoteObject.unexportObject(client,true);
    catch(Exception e){System.out.println(e.toString());}
    dispose();
    private class onshutdown extends Thread{
    public void run(){
    try{
    //server.disconnect(client);
    //UnicastRemoteObject.unexportObject(client,true);
    catch(Exception e){}
    }//run ends
    I hope this helps,
    Denis

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