LanComm

LanComm is a lightweight Java-based LAN chat system with a simple graphical interface. It allows users to communicate within the same local network — no internet required.

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📁 Project Structure

LanComm/
├──  com.lancomm.client/     → Client-side logic
├──  com.lancomm.server/     → Server-side logic
├──  com.lancomm.shared/     → Shared constants and definitions
└──  com.lancomm.ui/         → Java Swing GUI

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✨ Features

• Real-time chat over a local network
• Clean and intuitive graphical interface
• Multi-threaded server to handle multiple clients
• Fully offline – no internet needed

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🖼 Interface Preview

Login Window

Chat Room Window

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🚀 How to Use

1. Ensure all users are connected to the same local network (e.g., same Wi-Fi or router).

2. Start the server
   Run the main class:

   com.lancomm.server.Server
   

   Only one server instance is required.

3. Start a client
   Run the main class:

   com.lancomm.ui.App
   

   This will open the login window and connect to the server.

4. To simulate additional users
   Just run com.lancomm.ui.App again in a new terminal or on another device.

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📝 Notes

• The server must be started first, but only once.
• Clients can join and leave at any time.
• Useful in offline environments such as classrooms, workshops, and demos.

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📄 License

MIT © 2025 hejunjiecao