JChat Applicatioin with Java: multi clients

Hi Dear,

I tried to build simple client server application, using java technology, and i happied to share what i get here.

Function Requirement

Overview:
It is required to design and implement a simple client/server chat
application. Server is lunched and waiting for client connection. As
soon as client authenticates itself, a socket stream is opened between
client and server. Both exchange text messages through this stream
until any (server or client) requests to terminate the connection.
Note:
1. Server and client are two separate applications, running on a
single or two machines.
2. The connection is to be implemented using any connectivity
mechanism as long.
3. allow connection between one server and multiple clients

Document Contents

1. Use Case I , II , III
2. Sequence Diagram
3. Class Diagram
4. How To Run App
5. Screen Shot
6. Tools

Use Case I

Use Case II

Use Case III

Client app. Sequence Diagram

Server app. Sequence Diagram

Class Diagram

As we design application as multi-tear architecture, we divided classes in three layers , which are data, business , presentation

Finished Now, and continue in further post

ur comments are so useful to me, thx