LibraryLoginApp

What is this?

A small Java Swing desktop app that simulates a library system. It has:

• Login / Register screens
• Admin dashboard (manage users, manage books, impersonate a user)
• User dashboard (borrow / return books, change password)
• Book "stock" (quantity) tracking
• Data saved to simple .properties text files on disk (no database)

How to run (Command line)

1. Open a terminal/command prompt in the project folder (where LibraryLoginApp.java is).
2. Compile: javac -encoding UTF-8 LibraryLoginApp.java
3. Run: java LibraryLoginApp

On first run the app will create a "data" folder and seed two accounts.

Default accounts and codes

• Admin invite code (required when registering an admin): LIB-ADMIN-2025

• Seeded accounts (created automatically if no accounts exist): • admin / admin123 (admin) • user / user123 (regular user)

• Borrow limit: a user can borrow up to 5 books at a time.

Where is data stored?

Plain text .properties files under the "data" folder:

• Accounts: data/accounts/.properties Example keys: username, password, firstName, lastName, type, createdAt, lastLoginAt

• Books: data/books/.properties Example keys: id, title, author, stock, available, borrowers, borrowedAt.

You can reset the app by closing it and deleting the "data" folder.

How to use the app

1. Launch the app.
2. Log in:
   • Use admin/admin123 to manage users and books.
   • Use user/user123 to try borrowing/returning.
3. As Admin:
   • Manage Users: add/remove/edit users; impersonate a user to see their view.
   • Manage Books: add books, adjust stock, remove books.
4. As User:
   • "Borrow Books" shows only books with stock > 0.
   • Select a book and click "Borrow Selected".
   • Return a book from "My Borrowed Books".
   • Change password from your dashboard.