A simple online chat app built in Java using socket programming for real-time messaging between multiple clients. Features include user authentication (login/register), SQLite database for user accounts and chat logs, and multithreading for handling connections.
- Server-Client Architecture: Server handles multiple client connections and broadcasts messages.
- User Authentication: Register or login with username/password (passwords hashed with SHA-256).
- Persistent Storage: SQLite DB stores user details and chat history (timestamps, senders, messages).
- Graceful Handling: Clients can disconnect with 'exit'; server logs events.
- Java (Sockets, Multithreading, JDBC)
- SQLite (via sqlite-jdbc driver)
- Java JDK 8+
- Download sqlite-jdbc-3.50.3.0.jar (included in repo or from Maven)
- Clone the repo:
git clone https://github.com/Zeven243/Java-Chat-App.git - Navigate to the folder:
cd Java-Chat-App - Compile:
javac -cp ".;sqlite-jdbc-3.50.3.0.jar" ChatServer.java ChatClient.java(use:on Unix/Mac) - Run Server:
java -cp ".;sqlite-jdbc-3.50.3.0.jar" ChatServer - Run Clients (in separate terminals):
java -cp ".;sqlite-jdbc-3.50.3.0.jar" ChatClient- Follow prompts for register/login.
- Chat by typing messages; exit with 'exit'.
- Use DB Browser for SQLite (free download: https://sqlitebrowser.org/) to open
chat.db. - Tables:
users(usernames, password hashes),chat_logs(timestamps, senders, messages).
- Handled concurrency with threads to avoid blocking.
- Implemented secure auth with hashing.
- Integrated JDBC for persistence.
This was built as a university assignment but enhanced for portfolio purposes. Feel free to fork and improve!
License: MIT