💬 Java Chat App

A real-time chat system built using Java Sockets and Multithreading, inspired by modern messaging platforms like Discord.

📌 Overview

This project implements a multithreaded client-server chat system that enables multiple clients to communicate with each other in real-time through a central server.

• ⚡ Real-time messaging
• 🧵 Multithreaded server for handling multiple clients
• 🔌 TCP socket communication
• 💻 Command-line based client interface

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Each client connects to the server using TCP sockets.
The server creates a separate thread for every connected client, enabling simultaneous communication.

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📂 Structure

chatapp
│
├── client
│   ├── ChatClient.java
│   └── MessageListener.java
│
├── server
│   ├── ChatServer.java
│   └── ClientHandler.java
│
└── common
    └── Constants.java

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⚙️ Technologies Used

Technology	Purpose
☕ Java	Core programming language
🌐 TCP Sockets	Network communication
🧵 Multithreading	Handling multiple clients simultaneously
💻 CLI	User interaction

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🚀 How to Run

1️⃣ Compile the project

javac common/*.java server/*.java client/*.java

2️⃣ Start the server

java server.ChatServer

3️⃣ Start the client

java client.ChatClient

Note: Open multiple terminals and run the client program to simulate multiple users chatting simultaneously.

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📈 Future Improvements

• 👤 User authentication system
• 💬 Private messaging
• 🏠 Chat rooms / channels
• 📂 File sharing support
• 🎨 GUI using JavaFX or Swing
• 🗄️ Message history with database
• 🔐 End-to-end encryption

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📷 Output Example

Client 1: Hello everyone!
Client 2: Hi! How are you?
Client 3: Welcome to our chat discord.

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