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Thread: communication protocol

  1. #1
    Junior Member
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    Feb 2010
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    Smile communication protocol

    hello members
    i am building a client server chat application and apparently the server can receive a message from the client and send that message to all the clients connected to the server.
    that is not what i want,all i want is explained below

    When a user types something into their chat window, their message will be sent as a string through a DataOutputStream.

    When the server receives a message, through a DataInputStream, it will send this same message to a specific user(client) connected to the server, again as a string through a DataOutputStream.

    The users will use a DataInputStream to receive the message.

    here is a copy of the serverthread code

    import java.io.*;
    import java.net.*;
    public class ServerThread extends Thread
      // The Server that spawned us
      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
      // 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() );
          while (true) {
            // ... read the next message ...
            String message = din.readUTF();
            System.out.println( "Sending "+message );
            //  have the server send it to all clients
            server.sendToAll( message );
        } catch( EOFException ie ) {
        } catch( IOException ie ) {
          // This does; tell the world!
        } finally {
          // The connection is closed for one reason or another,
          // so have the server dealing with it
          server.removeConnection( socket );

  2. #2
    mmm.. coffee JavaPF's Avatar
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    May 2008
    United Kingdom
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    Default Re: communication protocol

    Hello isaac.

    Welcome to the Java Programming Forums.

    I have moved this thread to our Java Networking forum - Java Networking - Java Programming Forums
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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