Hi, I've to build a small Java Chat, based on 2 Clients and one central
Server.
No graphic elements are needed, this application runs in a system
shell.
I also have some examples (a client send to a server a string and this
resend this string with UpperCase to the client) so I think  I can use
che client code, but I must recompile che Server code. Can anyone help
me?

"code:SERVER"

   import java.io.*;
   import java.net.*;

   class TCPServer {

     public static void main(String argv[]) throws Exception
       {
         String clientSentence;
         String capitalizedSentence;

         ServerSocket welcomeSocket = new ServerSocket(6860);

         while(true) {

              Socket connectionSocket = welcomeSocket.accept();

              System.out.println("Connected to:  " +
               connectionSocket.getInetAddress());

              BufferedReader inFromClient =
                 new BufferedReader(new

InputStreamReader(connectionSocket.getInputStream()));

           DataOutputStream  outToClient =
                new
DataOutputStream(connectionSocket.getOutputStream());

              clientSentence = inFromClient.readLine();

              System.out.println("FROM CLIENT: " + clientSentence);

              capitalizedSentence = clientSentence.toUpperCase() +
'\n';

              System.out.println("TO CLIENT: " + capitalizedSentence);

              outToClient.writeBytes(capitalizedSentence);
           }
       }
   }

- - - - - - -

" code:CLIENT "

 import java.io.*;
   import java.net.*;
   class TCPClient {

       public static void main(String argv[]) throws Exception
       {
           String sentence;
           String modifiedSentence;

           BufferedReader inFromUser =
             new BufferedReader(new InputStreamReader(System.in));

       for (int i=0; i < argv.length; i++)
               System.out.println("argv[" + i + "]" + argv[i]);

           Socket clientSocket = new Socket(argv[0], 6860);

           DataOutputStream outToServer =
             new DataOutputStream(clientSocket.getOutputStream());

             BufferedReader inFromServer =
             new BufferedReader(new
             InputStreamReader(clientSocket.getInputStream()));

           sentence = inFromUser.readLine();

           outToServer.writeBytes(sentence + '\n');

           modifiedSentence = inFromServer.readLine();

           System.out.println("FROM SERVER: " + modifiedSentence);

           clientSocket.close();

       }
   }