Java TCP Chat Application

This is a simple terminal-based chat application built with Java using TCP sockets. It allows multiple clients to connect to a central server and chat with each other in real-time.

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Project Structure

• Server.java – Accepts clients, handles each one in a separate thread, and broadcasts messages to all connected clients.
• Client.java – Connects to the server, sends messages typed by the user, and displays messages received from other clients.

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Features

• Real-time message broadcasting to all connected clients
• Parallel handling of multiple clients using threads
• Username-based message identification
• Graceful client disconnection using "quit"

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How to Run

1. Compile the code

javac Server.java Client.java

2. Run the server

java Server

By default, it listens on port 7777.

3. Run one or more clients

java Client

You will be prompted to enter:

• Username
• Server IP (e.g., localhost)
• Server port (e.g., 7777)

4. Type quit to disconnect.

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Technologies Used

• Java SE
• TCP Sockets (java.net.Socket, ServerSocket)
• Multithreading (Thread class)
• Stream I/O (BufferedReader, PrintWriter)

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This project was implemented as part of a distributed systems TP (travaux pratiques).