UniChat - Network File-Sharing chat System (Java)

A modern, real-time chat application built using JavaFX and Java Socket Programming. UniChat allows users to connect to a central server, see who is online, and engage in both public and private conversations through a clean, dark-themed interface.

🚀 Key Features

• Authentication System: A dedicated login screen where users can authenticate with a username.
• Real-time Public Chat: A global communication channel to broadcast messages to all connected users.
• Private Messaging: Targeted, one-on-one communication capabilities between users.
• Live User List: A sidebar that displays all currently connected users in real-time.
• Modern UI: Built with JavaFX, featuring a responsive, dark-themed interface for a comfortable user experience.

📸 Project Interface

Login Screen	Authentication Success	Main Chat Interface

🛠 Tech Stack

• Language: Java 17+
• GUI Framework: JavaFX
• Networking: Java Sockets (TCP)
• Concurrency: Multi-threaded Client-Server architecture

💻 How to Run

1. Start the Server: Ensure the Server application is running to listen for incoming connections.
2. Launch the Client: Run the Launcher class to open the UI.
3. Connect: Enter your desired username on the login screen and click "Connect".

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3. Reuse your existing socket/streams logic — just move the "send" actions to button handlers and update the UI from ServerListener using Platform.runLater(...) (since UI updates must happen on the JavaFX Application Thread).

This part is completely optional and won't affect your core grade — just a fun way to practice connecting a GUI to networking code and multithreading.