A multithreaded client-server chat application built with Java Socket Programming.
This project demonstrates real-time communication where multiple clients can connect to a central server and exchange messages concurrently.

• Java Chat Application (Client-Server using Sockets)
  • 📋 Table of Contents
  • 🎯 Overview
  • ✨ Features
  • 🏗️ System Architecture
  • 🔧 Prerequisites
  • 🚀 Getting Started
  • 📁 Project Structure
  • 📸 Screenshots
    • 🖥️ Server Console
    • 🔑 Client Login
    • 💬 Chat Interface
  • 👥 Contributors
  • 🙏 Acknowledgments

• Language: Java (JDK 1.8+)
• Concepts: Socket Programming, Multithreading, I/O Streams
• GUI: Swing / AWT
• Architecture: Client-Server with multiple client handlers

• Multi-client Support: Handle multiple clients simultaneously
• Real-time Messaging: Instant message broadcasting to all connected clients
• GUI Interface: User-friendly graphical interface for both server and client
• Multithreaded Architecture: Each client connection handled in separate threads
• Cross-platform Compatibility: Works on Windows and Linux

 Server | ┌─────────────────┼─────────────────┐ │ │ │ ClientHandler ClientHandler ClientHandler Thread 1 Thread 2 Thread 3 │ │ │ Client1 Client2 Client3 

The server accepts multiple client connections and creates a dedicated ClientHandler thread for each client to manage message broadcasting.

• Java SE 8+ or later
• Java IDE (NetBeans, IntelliJ IDEA, or Eclipse) - optional but recommended
• JDK installed and configured
• MySQL installed and database created from sql-queries.sql

1. Clone the repository:

   git clone https://github.com/taher-dev/Chat-Application-JAVA.git cd java-chat-application

2. Open the project in your preferred Java IDE.

3. Compile the source code.

4. Run the Server: Execute the Main.java file first.

   File Location: server\src\main\Main.java

   The console will indicate that the server has started on port 9999.

5. Run the Client(s): Execute the Main.java file.

   File Location: server\src\main\Main.java

   You can run multiple instances of the client to simulate a group chat.

Chat-Application-JAVA/ ├───Chat_Application │ └───src │ ├───app │ ├───component │ ├───emoji │ │ └───icon │ ├───event │ ├───form │ ├───images │ ├───main │ ├───model │ ├───service │ ├───swing │ │ └───blurHash │ └───themes └───server └───src ├───app ├───connection ├───main ├───model ├───service └───swing └───blurHash 

Here’s what the application looks like in action:

Shows client connection notifications.

The initial login screen for the client application.

The main chat window where messages are exchanged between clients.

Chat View 1	Chat View 2

Avatar	Name	Email
	Taher Mahmud Monmoy	monmoyzx@gmail.com
	Abdullah Sardar	abdullahalarafat147@gmail.com

• This project was developed as part of the Computer Networking Lab (CSE 312) course at Green University of Bangladesh.
• A special thanks to our course teacher, Rusmita Halim Chaity, for her guidance.

Note: This project is for educational purposes and demonstrates fundamental concepts of socket programming and multithreading in Java.