Java chat applet

can any body hlp me....
i want to crate java chat applet i dont hav any idea plz hlp me
looking for +v response.

mail me for complete code
[email protected]
Vipin

Similar Messages

Java Chat applet won't send messages

So i got a brand new MacBook Air yesterday with Mac OS X 10.8.2 and installed Java 7 Update 9 from Oracle.
When using Safari 6 i run into a problem with a browser based Java chat applet.
First of all: Java and Javascript are actibated in Safari.
So I go to the chat's website and start the chat.
Java works fine at first and the chat starts.
People can send me private messages and i can type in a reply.
However I cannot send these replies. Neither in the private messages (applet) nor in the main chat (browser).
Any idea how to fix this issue?
(BTW: Java 7 was the first Java ever installed on my Air, so no going back to Apples Java 6)

And Java 7 Update 10 did not solve the problem either.
Can anybody offer any ideas for a solution?
Help would be much appreciated.

Problem loading the chat applet, red x mark sign..

Hello all - hopefully this is the correct place for this post. I've been trying to load a java enabled chat room, and keep getting a red X in the top left corner (java applet failed, etc).
Java chat applet fails to load in the following website www.chat-web.com, but loads in the other websites. the following is the version i have installed in my computer. Version 6 Update 12 (build 1.6.0_12-b04). I have visited the help section of the website in which java applet fails to load and tried all the following steps,
1) I cleared all the temp files from the internet options.
2) cleared the cache in the java plug-in
3) disabled the pop-up blocker
insipite of the above steps the problem still persists..
here is a screen shot of the error > http://i42.tinypic.com/2pzwhvp.jpg
here is the details of the error :
Java Plug-in 1.6.0_12
Using JRE version 1.6.0_12 Java HotSpot(TM) Client VM
User home directory = C:\Users\Guest
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class com.chatspace.v20090.Chat not found.
java.lang.ClassNotFoundException: com.chatspace.v20090.Chat
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection timed out: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at sun.net.NetworkClient.doConnect(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.<init>(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
     at java.net.HttpURLConnection.getResponseCode(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 7 more
Exception: java.lang.ClassNotFoundException: com.chatspace.v20090.Chat
Does this look like a chat room error? I think my side is fine, but I could be wrong. I'm not the best technical person, but just know the basics.
Anyone have any ideas?
Thanks!
livelife

Hi. Thank you for reply. I tried the steps suggested by you, but it still shows the same errors, i e-mailed to chat-web.com as well but seems the e-mail is invalid. i tried to load the chat rooms in my desktop pc too, i get the same error,
Java Plug-in 1.6.0_13
Using JRE version 1.6.0_13 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Intel
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class com.chatspace.v20090.Chat not found.
java.lang.ClassNotFoundException: com.chatspace.v20090.Chat
     at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
     at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Network is unreachable: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.SocksSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at sun.net.NetworkClient.doConnect(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.<init>(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
     at java.net.HttpURLConnection.getResponseCode(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
     at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 7 more
Exception: java.lang.ClassNotFoundException: com.chatspace.v20090.Chat
lifelive

I need help on steps on working and building chat applet

is there a site where you can get some codes on building java chat applet?
whats the easiest thing to do on making a chat server?

java.sun.com has one.
Check out the client and server source here:
http://developer.java.sun.com/developer/technicalArticl
s/InnerWorkings/Burrowing/SimpleChatApplet.java
http://developer.java.sun.com/developer/technicalArticl
s/InnerWorkings/Burrowing/SimpleChatServer.java
Enjoy.
~Markhi mark! i'm sorry for the silly question i'm asking...
i have compiled the two source code u suggest, but...
i don't know what to do with them. i put the code of
applet in a html, and i run the server on port 6006.
do u need a web server? i've tryed to load
http://localhost/chat.html and i see the page but also
the error of communication.. so i put the :6006 but
i have the error page... what do i need? help, please..
thanks

Trying to produce a java chat server

Would like produce a working client/server chat system, as basic as possible but able to listen and talk to each other. Any chat servers how-to examples I've come across never seem to work.
Would like to understand why applets don't work when I open the web page but do work when I view using the appletviewer. I use Internet Explorer 4 i think, java version 1.3.0_02
would you understand at least part of this error which appears when I run a chat server
exception:com.ms.security.SecurityExceptionEx[Client.<int>]:cannot access "194.81.104.26":5660
(the error is all one line no spaces)
the following code is one of the programs I've been working on and I receive the above error, appletviewer doesn't work so i think that means something is wrong with the code, client side as the server side works well, it listens etc
// Client side
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class Client extends Panel implements Runnable
// Components for the visual display of the chat windows
private TextField tf = new TextField();
private TextArea ta = new TextArea();
// The socket connecting us to the server
private Socket socket;
// The streams we communicate to the server; these come
// from the socket
private DataOutputStream dout;
private DataInputStream din;
// Constructor
public Client( String host,int port ) {
// Set up the screen
setLayout( new BorderLayout() );
add( "North", tf );
add( "Center", ta );
// Receive messages when someone types a line
// and hits return, using an anonymous class as
// a callback
tf.addActionListener( new ActionListener() {
public void actionPerformed( ActionEvent e ) {
processMessage( e.getActionCommand() );
// Connect to the server
try {
// Initiate the connection
socket = new Socket( host, port );
// Recieved a connection
System.out.println( "connected to "+socket );
// Create DataInput/Output streams
din = new DataInputStream( socket.getInputStream() );
dout = new DataOutputStream( socket.getOutputStream() );
// Start a background thread for receiving messages
new Thread( this ).start();
} catch( IOException ie ) { System.out.println( ie ); }
// Called when the user types something
private void processMessage( String message ) {
try {
// Send it to the server
dout.writeUTF( message );
// Clear out text input field
tf.setText( "" );
} catch( IOException ie ) { System.out.println( ie ); }
// Background thread runs this: show messages from other window
public void run() {
try {
// Receive messages one-by-one, forever
while (true) {
// Get the next message
String message = din.readUTF();
// Print it to our text window
ta.append( message+"\n" );
} catch( IOException ie ) { System.out.println( ie ); }
// ClientApplet
import java.applet.*;
import java.awt.*;
import java.io.*;
import java.net.*;
public class ClientApplet extends Applet
public void init() {
//String host = getParameter( "host" );
     String host="194.81.104.26";
     //int port = Integer.parseInt( getParameter( "port" ) );
     int port =5660;
setLayout( new BorderLayout() );
add( "Center", new Client( host, port ) );
// server
import java.io.*;
import java.net.*;
import java.util.*;
public class Server
// The ServerSocket is used for accepting new connections
private ServerSocket ss;
// A mapping from sockets to DataOutputStreams. This will
// help us avoid having to create a DataOutputStream each time
// we want to write to a stream.
private Hashtable outputStreams = new Hashtable();
// Constructor and while-accept loop all in one.
public Server( int port ) throws IOException {
// listening
listen( port );
private void listen( int port ) throws IOException {
// Create the ServerSocket
ss = new ServerSocket( port);
// ServerSocket is listening
System.out.println( "Listening on "+ss );
// Keep accepting connections forever
while (true) {
// The next incoming connection
Socket s = ss.accept();
// Connection
System.out.println( "Connection from "+s );
// Create a DataOutputStream for writing data to the
// other side
DataOutputStream dout = new DataOutputStream( s.getOutputStream() );
// Save this stream so we don't need to make it again
outputStreams.put( s, dout );
// Create a new thread for this connection, and then forget
// about it
new ServerThread( this, s );
// Get an enumeration of all the OutputStreams, one for each client
// connected to us
Enumeration getOutputStreams() {
return outputStreams.elements();
// Send a message to all clients (utility routine)
void sendToAll( String message ) {
// We synchronise on this because another thread might be
// calling removeConnection()
synchronized( outputStreams ) {
// For each client ...
for (Enumeration e = getOutputStreams(); e.hasMoreElements(); ) {
// ... get the output stream ...
DataOutputStream dout = (DataOutputStream)e.nextElement();
// ... and send the message
try {
dout.writeUTF( message );
} catch( IOException ie ) { System.out.println( ie ); }
// Remove a socket, and it's corresponding output stream, from our
// list. This is usually called by a connection thread that has
// discovered that the connectin to the client is dead.
void removeConnection( Socket s ) {
// Synchronise so sendToAll() is okay while it walks
// down the list of all output streams
synchronized( outputStreams ) {
// Removing connection
System.out.println( "Removing connection to "+s );
// Remove it from our hashtable/list
outputStreams.remove( s );
// Make sure it's closed
try {
s.close();
} catch( IOException ie ) {
System.out.println( "Error closing "+s );
ie.printStackTrace();
// Main routine
// Usage: java Server <port>
static public void main( String args[] ) throws Exception {
// Get the port # from the command line
int port = Integer.parseInt( args[0] );
     //int port = 5000;
// Create a Server object, which will automatically begin
// accepting connections.
new Server( port);
// ServerThread
import java.io.*;
import java.net.*;
public class ServerThread extends Thread
// The Server that spawned
private Server server;
// The Socket connected to our client
private Socket socket;
// Constructor.
public ServerThread( Server server, Socket socket ) {
// Save the parameters
this.server = server;
this.socket = socket;
// Start up the thread
start();
// This runs in a separate thread when start() is called in the
// constructor.
public void run() {
try {
// Create a DataInputStream for communication; the client
// is using a DataOutputStream to write to us
DataInputStream din = new DataInputStream( socket.getInputStream() );
// Over and over, forever ...
while (true) {
// ... read the next message ...
String message = din.readUTF();
// ... sending printed to screen ...
System.out.println( "Sending "+message );
// ... and have the server send it to all clients
server.sendToAll( message );
} catch( EOFException ie ) {
// This doesn't need an error message
} catch( IOException ie ) {
// This needs an error message
ie.printStackTrace();
} finally {
// The connection is closed for one reason or another,
// so have the server dealing with it
server.removeConnection( socket );
<body bgcolor="#FFFFFF">
<applet code="ClientApplet" width=600 height=400>
<param name=host value="127.0.0.1">
<param name=port value="5660">
[Chat applet]
</applet>
</body>

Hi!
Go to
http://www.freecode.com/projects/jchat-java2clientserverchatmodule/
probably u will het the answer..
Jove

Chat Applet using RMI .... trouble running the Applet using the IE browser.

Hi,
I'm trying to run a chat application using RMI technology. Actually, this wasn't created from the scratch. I got this one from from the cd that comes with the book I bought and I did some refinements on it to suit what I wanted to:
These are the components of the chat application:
1. RApplet.html - invokes the applet
html>
<head>
<title>Sample Applet Using Dialog Box (1.0.2) - example 1</title>
</head>
<body>
<h1>The Sample Applet</h1>
<applet code="RApplet.class" width=460 height=160>
</applet>
</body>
</html>
2. RApplet.java - Chat session client applet.
import java.rmi.*;
import java.applet.*;
import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.rmi.server.*;
//import ajp.rmi.*;
public class RApplet extends Applet implements ActionListener {
// The buttons
Button sendButton;
Button quitButton;
Button startButton;
Button clearButton;
// The Text fields
TextField nameField;
TextArea typeArea;
// The dialog for entering your name
Dialog nameDialog;
// The name the server knows us as
String privateName;
// The name we want to be known as in the chat session
String publicName;
// The remote chats erver
ChatServer chatServer;
// The ChatCallback
ChatCallbackImplementation cCallback;
// The main Chat window and its panels
Frame mainFrame;
Panel center;
Panel south;
public void init() {
// Create class that implements ChatCallback.
cCallback = new ChatCallbackImplementation();
     // Create the main Chat frame.
     mainFrame = new Frame("Chat Server on : " +
                    getCodeBase().getHost());
     mainFrame.setSize(new Dimension(600, 600));
     cCallback.displayArea = new TextArea();
     cCallback.displayArea.setEditable(false);
     typeArea = new TextArea();
     sendButton = new Button("Send");
     quitButton = new Button("Quit");
     clearButton = new Button("Clear");
     // Add the applet as a listener to the button events.
     clearButton.addActionListener(this);
     sendButton.addActionListener(this);
     quitButton.addActionListener(this);
     center = new Panel();
     center.setLayout(new GridLayout(2, 1));
     center.add(cCallback.displayArea);
     center.add(typeArea);
     south = new Panel();
     south.setLayout(new GridLayout(1, 3));
     south.add(sendButton);
     south.add(quitButton);
     south.add(clearButton);
     mainFrame.add("Center", center);
     mainFrame.add("South", south);
     center.setEnabled(false);
     south.setEnabled(false);
     mainFrame.show();
     // Create the login dialog.
     nameDialog = new Dialog(mainFrame, "Enter Name to Logon: ");
     startButton = new Button("Logon");
     startButton.addActionListener(this);
     nameField = new TextField();
     nameDialog.add("Center", nameField);
     nameDialog.add("South", startButton);
     try {
     // Export ourselves as a ChatCallback to the server.
     UnicastRemoteObject.exportObject(cCallback);
     // Get the remote handle to the server.
     chatServer = (ChatServer)Naming.lookup("//" + "WW7203052W2K" +
                              "/ChatServer");
     catch(Exception e) {
     e.printStackTrace();
     nameDialog.setSize(new Dimension(200, 200));
     nameDialog.show();
* Handle the button events.
public void actionPerformed(ActionEvent e) {
     if (e.getSource().equals(startButton)) {
     try {
          nameDialog.setVisible(false);;
          publicName = nameField.getText();
          privateName = chatServer.register(cCallback, publicName);
          center.setEnabled(true);
          south.setEnabled(true);
          cCallback.displayArea.setText("Connected to chat server as: " +
                         publicName);
          chatServer.sendMessage(privateName, publicName +
                         " just connected to server");
     catch(Exception ex) {
          ex.printStackTrace();
     else if (e.getSource().equals(quitButton)) {
     try {
          cCallback.displayArea.setText("");
          typeArea.setText("");
          center.setEnabled(false);
          south.setEnabled(false);
          chatServer.unregister(privateName);
          nameDialog.show();
     catch(Exception ex) {
          ex.printStackTrace();
     else if (e.getSource().equals(sendButton)) {
     try{
          chatServer.sendMessage(privateName, typeArea.getText());
          typeArea.setText("");
     catch(Exception ex) {
          ex.printStackTrace();
     else if (e.getSource().equals(clearButton)) {
     cCallback.displayArea.setText("");
public void destroy() {
     try {
     super.destroy();
     mainFrame.setVisible(false);;
     mainFrame.dispose();
     chatServer.unregister(privateName);
     catch(Exception e) {
     e.printStackTrace();
3. Chatcallback.java - interface used by clients to connect to the server.
import java.rmi.*;
public interface ChatCallback extends Remote {
public void addMessage(String publicName,
               String message) throws RemoteException;
4. ChatcallbackImplementation.java - implements Chatcallback interface.
import java.rmi.*;
import java.io.*;
import java.awt.event.*;
import java.awt.*;
public class ChatCallbackImplementation implements ChatCallback {
// The buttons
// The Text fields
TextArea displayArea;
public void addMessage(String publicName,
               String message) throws RemoteException {
displayArea.append("\n" + "[" + publicName + "]: " + message);
5. Chatserver.java - interface for the chat server.
import java.rmi.*;
import java.io.*;
public interface ChatServer extends Remote {
public String register(ChatCallback object,
               String publicName) throws RemoteException;
* Remove the client associated with the specified registration string.
* @param registeredString the string returned to the client upon registration.
public void unregister(String registeredString) throws RemoteException;
* The client is sending new data to the server.
* @param assignedName the string returned to the client upon registration.
* @param data the chat data.
public void sendMessage(String registeredString, String message) throws RemoteException;
6. ChatServerImplementation.java - implements Chatserver interface.
import java.rmi.*;
import java.util.*;
import java.rmi.server.*;
import java.io.*;
* A class that bundles the ChatCallback reference with a public name used
* by the client.
class ChatClient {
private ChatCallback callback;
private String publicName;
ChatClient(ChatCallback cbk, String name) {
     callback = cbk;
     publicName = name;
// returns the name.
String getName() {
     return publicName;
// returns a reference to the callback object.
ChatCallback getCallback() {
     return callback;
public class ChatServerImplementation extends UnicastRemoteObject
implements ChatServer {
// The table of clients connected to the server.
Hashtable clients;
// Tne number of current connections to the server.
private int currentConnections;
// The maximum number of connections to the server.
private int maxConnections;
// The output stream to write messages to.
PrintWriter writer;
* Create a ChatServer.
* @param maxConnections the total number if connections allowed.
public ChatServerImplementation(int maxConnections) throws RemoteException {
     clients = new Hashtable(maxConnections);
     this.maxConnections = maxConnections;
* Increment the counter keeping track of the number of connections.
synchronized boolean incrementConnections() {
     boolean ret = false;
     if (currentConnections < maxConnections) {
     currentConnections++;
     ret = true;
     return ret;
* Decrement the counter keeping track of the number of connections.
synchronized void decrementConnections() {
     if (currentConnections > 0) {
     currentConnections--;
* Register with the ChatServer, with a String that publicly identifies
* the chat client. A String that acts as a "magic cookie" is returned
* and is sent by the client on future remote method calls as a way of
* authenticating the client request.
* @param object The ChatCallback object to be used for updates.
* @param publicName The String the object would like to be known as.
* @return The actual String assigned to the object for removing, etc. or
* null if the client could not register.
public synchronized String register(ChatCallback object, String publicString) throws RemoteException {
     String assignedName = null;
     if (incrementConnections()) {
     ChatClient client = new ChatClient(object, publicString);
     assignedName = "" + client.hashCode();
     clients.put(assignedName, client);
     out("Added callback for: " + client.getName());
     return assignedName;
* Remove the client associated with the specified registration string.
* @param registeredString the string returned to the client upon registration.
public synchronized void unregister(String registeredString) throws RemoteException {
     ChatCallback cbk;
     ChatClient sender;
     if (clients.containsKey(registeredString)) {
     ChatClient c = (ChatClient)clients.remove(registeredString);
     decrementConnections();
     out("Removed callback for: " + c.getName());
     for (Enumeration e = clients.elements(); e.hasMoreElements(); ) {
          cbk = ((ChatClient)e.nextElement()).getCallback();
          cbk.addMessage("ChatServer",
                    c.getName() + " has left the building...");
     else {
     out("Illegal attempt at removing callback (" + registeredString + ")");
* Sets the logging stream.
* @param out the stream to log messages to.
protected void setLogStream(Writer out) throws RemoteException {
     writer = new PrintWriter(out);
* The client is sending new message to the server.
* @param assignedName the string returned to the client upon registration.
* @param data the chat data.
public synchronized void sendMessage(String registeredString, String message) throws RemoteException {
     ChatCallback cbk;
     ChatClient sender;
     try {
     out("Recieved from " + registeredString);
     out("Message: " + message);
     if (clients.containsKey(registeredString)) {
          sender = (ChatClient)clients.get(registeredString);
          for (Enumeration e = clients.elements(); e.hasMoreElements(); ) {
               cbk = ((ChatClient)e.nextElement()).getCallback();
               cbk.addMessage(sender.getName(), message);
     else {
          out("Client " + registeredString+ " not registered");
     catch(Exception ex){
     out("Exception thrown in newData: " + ex);
     ex.printStackTrace(writer);
     writer.flush();
* Write s string to the current logging stream.
* @param message the string to log.
protected void out(String message){
     if(writer != null){
     writer.println(message);
     writer.flush();
* Start up the Chat server.
public static void main(String args[]) throws Exception {
     try {
     // Create the security manager
     System.setSecurityManager(new RMISecurityManager());
     // Instantiate a server
     ChatServerImplementation c = new ChatServerImplementation(10);
     // Set the output stream of the server to System.out
     c.setLogStream(new OutputStreamWriter(System.out));
     // Bind the server's name in the registry
     Naming.rebind("//" + args[0] + "/ChatServer", c);
     c.out("Bound in registry.");
     catch (Exception e) {
     System.out.println("ChatServerImplementation error:" +
                    e.getMessage());
     e.printStackTrace();
Using my own machine (connected to a network), I tried to test this one out by setting mine as the server and also the client. I did the following:
1. Compile the source code.
2. Use rmic to generate the skeletons and/or stubs from the ChatCallbackImplementation and ChatServerImplementation.
3. Start the rmiregistry with no CLASSPATH
4. Start the server successfully.
5. Start the applet using the AppletViewer command.
It worked fined.
The problem is when I ran the applet using the browser, IE explorer, the dialog boxes, frame and buttons did appear. I was able to do the part of logging on. But after that, the applet seemed to have hang. No message appeared that says I'm connected (which appeared using the appletviewer). I clicked the send button. No response.
I double-checked my classpath. I did have my classpath set correctly. I'm still trying to figure out the problem. Up to now, I don't have any clue what it is.
I will appreciate much if someone can help me figure what's could have possibly been wrong ....
Thanks a lot ...

Hi Domingo,
I had a similar problem running applet/rmi with IE.
Looking in IE..view..JavaConsole error messages my applet was unable to find java.rmi.* classes.
I checked over java classes in msJVM, they're not present.
( WinZip C:\WINDOWS\JAVA\Packages\9rl3f9ft.zip and others from msVM installed )
( do not contain the java.rmi.* packages )
I have downloaded and installed the latest msJVM for IE5. ( I think its included in later versions)
@http://www.objectweb.org/rmijdbc/RJfaq.html I found ref to rmi.zip download to provide
these classes. I couldn't get the classes from the site but I managed to find a ref to IBM
site @http://alphaworks.ibm.com/aw.nsf/download/rmi which had similar download.
The download however didn't solve my problems. I was unable to install rmi.zip with
RmiPatch.exe install.
I solved this by extracting the class files from rmi.zip and installing them at C:\WINDOWS\JAVA\trustlib ( msJVM installation trusted classes lib defined in
registry HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Java VM\TrustedLibsDirectory )
This solved the problem. My rmi/applet worked.
Hope this helps you.
Chris
([email protected])

Chat applet

hello,
i developed a chat applet using JDK 1.3 .It is a swing applet.when i compile and run the applet ,it runs well inthe appletviewer.In IE ,it shows the following error "java.lang.ClassNotFoundException: javax.swing.JApplet".I think it needs java plugin.In JDK 1.3, javaplugin is already builtin.Then why it shows the above said error?.Kindly clarify the error.THIS IS VERY URGENT.

i also have done that type of applicaton with messenger , if you use Only Applet
then client side browser have also java plugin in defult and suport Applet but
if you use JApplet then u should have to use java plugin which support Swing
at client side.
i come at this Forum some time, if you u have any problem then u can
contect me at [email protected]
OK ?

Applying images as skins in chat applet

Hi,
I have developed chat applet. I have implemented skins in that applet. But as colors. So how to apply images as diff skins.
It is urgent.
Please be polite and answer

Good evening, sir, or madam, as the case may be,
To correctly implement this, you must first learn how to load image files into an applet. Might I be so bold as to recommend that one look at the javax.swing.ImageIcon class, as it is endowed with constructors which facilitate the loading of images via a URL.
Following that, I would then encourage you to learn how to take said loaded image and draw it on component. For this, I would recommend subclassing some component (JPanel, or some other suitable component), and override the paintComponent() method. The java.awt.Graphics class is supremely suited to perform drawing operations of this sort, as well as many others.
Once you have successfully completed these tasks, then you will find that you have an applet which one can decorated with wonderful imagery from all corners of the world.
Yours most sincerely,
bsampieri

Java chat console not appearing

hi there. please help. i am trying to use java chat console but cannot get it to work. i have tried everthing that the chat site tech asks of me, but still no luck. anyone else had this problem PLEASE let me know how u solved it.
many thanks

This isn't really a Java programming question... it's more a "something's disconfigured on someone's computer" question... but, just for fun, here are the things you need to check:
Does your browser have a Java plug-in installed? Is the version of the Java plug-in compatible with the Java chat version the server is using? Do you have Java enabled in your browser? Do you have this problem with other Java applets from other sites, or only this one?
I'd recommend upgrading your JVM (or downgrading it, if the site is really that broken), checking your browser settings, and possibly testing with another browser.
Sincerely,
Dylan

URGENT!! help on CHAT APPLET

i've created a chat Applet as client. i want it to be used like this
-user login
-choose chat room
-and start applet.
what i've done now is chat applet. i want it to be used by multi user.
and display online users name or username.
but now it can only detect one user. if i run many applet concurrently using my pc, it can't detect other user's name.
how to do that?
please someone help me!!

this is my codes.
it can be compiled but nothing appears when i run appletviewer ChatApplet2.html
what happen?
import java.lang.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class ChatApplet2 extends Applet implements ActionListener,Runnable
String user;
String msg;
     String chatServer;
     ObjectOutputStream output;
     ObjectInputStream input;
     Socket client;
     public void init() {
          super.init();
          //{{INIT_CONTROLS
          setLayout(new BorderLayout(0,0));
          addNotify();
          resize(518,347);
          setBackground(new Color(12632256));
displayArea = new java.awt.TextArea("",2,0,TextArea.SCROLLBARS_NONE);
          displayArea.setEditable(false);
displayArea.disable();
//displayArea.hide();
          displayArea.reshape(0,0,380,216);
          add(displayArea);
          idbox = new java.awt.TextField();
          idbox.reshape(84,288,284,24);
          add(idbox);
          button1 = new java.awt.Button("EnterRoom");
          button1.reshape(384,288,72,21);
          add(button1);
list = new java.awt.List();
//list.TOP_ALIGNMENT();
//list.disable();
list = new java.awt.List(5);
list.add("#Default User"+"\n");
list.reshape(384,24,128,196);
list.setFont(new Font("Helvetica", Font.BOLD, 12));
add(list);
          label2 = new java.awt.Label("Members");
          label2.reshape(396,0,100,19);
          add(label2);
          label1 = new java.awt.Label("UserName");
          label1.reshape(0,288,72,27);
          add(label1);
          enterField = new java.awt.TextField();
          enterField.reshape(84,240,431,44);
          add(enterField);
          label3 = new java.awt.Label("EnterText");
          label3.reshape(0,252,72,25);
          add(label3);
//uf = new UserFrame();
          button1.addActionListener(this);
idbox.addActionListener(this);
enterField.addActionListener(this);
list.addActionListener(this);
public void actionPerformed(ActionEvent ae)
          if(ae.getSource()==idbox)
user = idbox.getText()+"\n";
list.addItem(user.trim());
idbox.setText("");
          displayArea.append(user +" HAS JOINED THE GROUP");
     if(ae.getSource().equals(button1))
user = idbox.getText()+"\n";
list.addItem(user.trim());
idbox.setText("");
          displayArea.append(user +" HAS JOINED THE GROUP");
if(ae.getSource().equals(enterField))
sendData(ae.getActionCommand() );
               /*msg = enterField.getText();
displayArea.append(msg +"\n");
enterField.setText("");*/
if(ae.getSource().equals(list))
String l = list.getSelectedItem();
                         //uf.setTitle(l);
                         //Frame i[] = uf.getFrames();
                         //uf.setVisible(true);
public void start()
          try {
     // Step 1: Create a Socket to make connection
     connectToServer();
     // Step 2: Get the input and output streams
     getStreams();
     // Step 3: Process connection
     processConnection();
     // Step 4: Close connection
     closeConnection();
     // server closed connection
          catch ( EOFException eofException ) {
     System.out.println( "Server terminated connection" );
     // process problems communicating with server
          catch ( IOException ioException ) {
     ioException.printStackTrace();
if(vt == null)
vt = new Thread(this,getClass().getName());
vt.start();
public void run()
try{
for(int i=0;i<10;i++)
displayArea.append("One stop Java source code - www.globalleafs.com"+"\n");
displayArea.setForeground(Color.red);
vt.sleep(30000);
vt.resume();
}catch(Exception e){e.printStackTrace();}
     private void sendData( String msg )
          // send object to server
          try {
          output.writeObject( user + ">>> " + msg );
          output.flush();
          displayArea.append( "\nuser>>>" + msg );
          // process problems sending object
          catch ( IOException ioException ) {
          displayArea.append( "\nError writing object" );
     // get streams to send and receive data
     private void getStreams() throws IOException
          // set up output stream for objects
          output = new ObjectOutputStream(
          client.getOutputStream() );
          // flush output buffer to send header information
          output.flush();
          // set up input stream for objects
          input = new ObjectInputStream(
     client.getInputStream() );
          displayArea.append( "\nGot I/O streams\n" );
     // connect to server
     private void connectToServer() throws IOException
          displayArea.setText( "Attempting connection\n" );
          // create Socket to make connection to server
          client = new Socket(
     InetAddress.getByName( chatServer ), 5000 );
          // display connection information
          displayArea.append( "Connected to: " +
     client.getInetAddress().getHostName() );
     // process connection with server
     private void processConnection() throws IOException
          // enable enterField so client user can send messages
          enterField.setEnabled( true );
          // process messages sent from server
          do {
          // read message and display it
          try {
          msg = ( String ) input.readObject();
          displayArea.append( "\n" + msg );
          displayArea.setCaretPosition(
          displayArea.getText().length() );
          // catch problems reading from server
          catch ( ClassNotFoundException classNotFoundException ) {
          displayArea.append( "\nUnknown object type received" );
          } while ( !msg.equals( "SERVER>>> TERMINATE" ) );
     } // end method process connection
     // close streams and socket
     private void closeConnection() throws IOException
          displayArea.append( "\nClosing connection" );
          output.close();
          input.close();
          client.close();
     java.awt.TextArea displayArea;
     java.awt.TextField idbox;
     java.awt.Button button1;
java.awt.List list;
java.awt.Label label2;
     java.awt.Label label1;
     java.awt.TextField enterField;
     java.awt.Label label3;
private Thread vt;

Problem in voice chat applet

hi all,
I am developing a Voice chat applet using java(JDK1.4,JMF). If i run my programs of transmitting voice and receiving voice from one machine to another machine(Without applet), its working fine.
When i am sending voice from my server machine, and receiving on someother machine by application, its working fine.
But if i am using my applet from some other machine(Other then server) its creating problems. Its showing some errors.
Can you suggest some solutions??
Thanks in advance.
Abhishek

hi,
i also develop the voice chat application. can you send your source code to me. may be i can help you to solve your problems.
my email is [email protected]

Voice Chat Applet

Hey all,
I want to develop a voice chat applet in Java. (similar to the one used in Yahoo chat rooms). I know basic Java, but I don't know where to start in developing an applet like this. I don't know what libraries or protocols I need to be focusing on. If anyone can offer me some advice or the steps necessary to create this applet, I would be very appreciative.
Thank you,
Khanathor

Yeah, you would deserve thanks if
1) I hadn't spent all day doing research.Sorry, but my mind-reading device wasn't working. So sorry that I couldn't tell that you had done that. Maybe it would have made a difference if you had done something like MENTIONING it in the first place.
2) Your search query wasn't even what I was
requesting assistance for.Oh, sorry again for not reading your mind as to what you were looking for other than a response for basically "I don't even know where to begin".
3) Your response didn't so clearly reflect your
arrogance.That's ok. Your post clearly reflected your lack of initiative and intelligence.

Java chat client behind the proxy or fire wall

i am developing the chat application useing java.net.*.but i am not able to get connectivity behind the firewall or proxy on the java client.pls help me out

to guarantee easy to use, no problem chat applet then you will need to have the chat server running on port 80 and the client use http request/response system
first problem is that the applet will have to have been delivered from port 80 on the same ip# so you will either have to use Servlets or write your own web server with chat facilities
you will need to maitain persistent/ pseudo persistent http connections for the server to deliver messages to clients, you can assume that a connection will remain open for ~ 5 minutes after a request from the client
use HTTP/1.1 for reliable Connection: keep-alive and request/response pipelining
with all that in place your client method is...
register and send GET /chat <wait for upto 5 mins>
if there is client activity send POST/chat <wait for upto 5 mins>
if the above waits timeout send GET/chat <wait for upto 5mins>
server method...
accept GET/POST requests from client
if there is chat to deliver, reply to most recent request from client
if you recive another request before the previous one's reply is used, send a No Content reply to the previous request

Chat Applet locks up when connected to a server

Hey, I am making a chat applet to reach out to IRC like servers. The problem I'm having is when it connects the program locks up till the server disconnect, then it prints the spool into my JTextArea.
Now, and more bazaar, is that I cannot find a single instructor on the grounds of my tech school who can help me with networking java when 4 people teach in the damn format. Naturally, I'm very frustrated. Any help would be appreciated.

The full code is at: [http://pastebin.com/m49fe14be|pastebin.com/m49fe14be]
Naturally I'll be changing this again at least once when I figure out how to play this out.
Where I'm having problems is: #
        public void connectOut(){
                try{
                        connectionAddr = InetAddress.getByName(server);
                        connect = new Socket(server, port);
                        initiateReadWrite();
                        //threadRun();
                        //listener = new Thread();
                        //listener.start();
                        //while(listener.isAlive()){
                        readFromServer();
                        connect.setKeepAlive(true);
                catch(Exception e){
                        exceptioner(e);
        }Or
        public synchronized void readFromServer(){
                try{
                        String readin;
                        while((readin = in.readLine()) != null){
                                scrolledText.append(readin + "\n");
                catch(Exception e){
                        exceptioner(e);
                }I'm utterly lost and cannot find anyone to help me at my technical college. Four instructors and not a one understands threading.

Is there free java chat, which i can embed in my Swing application

Hello all,
I have a Swing application and i want to embed java chat into it.
Can you recommend me free chat for which i can see and modofy client and server sources.
Regards,
Chavdar

No.

Java chat applet

Similar Messages

Maybe you are looking for