Java Chat Application (Client-Server using Sockets)

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.

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📋 Table of Contents

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

✨ Features

• Multithreaded Server: The server can handle multiple clients at the same time.
• Real-Time Chat: Enables simultaneous communication among all connected clients.
• Client-Server Architecture: Uses TCP communication through Java Sockets.
• Graphical User Interface: Provides a simple GUI for user interaction on the client side.

🎯 Overview

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

✨ Features

• 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

🏗️ System Architecture

                    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.

🔧 Prerequisites

• 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

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🚀 Getting Started

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.

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📁 Project Structure

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

📸 Screenshots

Here’s what the application looks like in action:

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🖥️ Server Console

Shows client connection notifications.

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🔑 Client Login

The initial login screen for the client application.

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💬 Chat Interface

The main chat window where messages are exchanged between clients.

Chat View 1	Chat View 2

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👥 Contributors

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

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🙏 Acknowledgments

• 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.