A JavaFX desktop app for managing conference bookings, built as an exam project and graded 10 (the Danish scale tops out at 12).

KAS is for the person running a conference: participants, hotels, excursions and bookings, including pricing, companions, hotel add-ons and lecturer status.

• Create, edit and delete conferences, each with a date range and a daily price.
• Register participants, optionally with a company. A participant can be booked as a lecturer, which waives the conference fee.
• Attach hotels to a conference with single and double room prices, plus optional add-ons like WiFi or breakfast.
• Set up excursions per conference with their own prices. Excursions are booked for the participant's companion.
• Make a booking that ties together participant, hotel, room type, companion, excursions and add-ons, and get the total price calculated.
• Search for a participant by name and see their bookings.
• Bookings are listed alphabetically by participant name, sorted with a hand-written selection sort.
• Data is entered and edited through modal dialogs with input validation.

It's a layered design: GUI on top, a controller layer in the middle, and the domain model with in-memory storage underneath.

src/
├── application/
│   ├── model/          # Domain model (Conference, Hotel, Participant, etc.)
│   └── controller/     # Business logic (Controller.java)
├── gui/                # JavaFX panes and windows
└── storage/            # Static in-memory storage (Storage.java)

A booking's total is:

Total = conference fee  (daily rate × days, both arrival and departure day count; waived for lecturers)
      + hotel           ((room rate + add-ons) × nights)
      + excursions      (sum of the companion's excursions)

• Java with JavaFX for the GUI
• java.time.LocalDate for dates
• An IntelliJ IDEA project (KAS.iml)

You'll need Java 17 or later, the JavaFX SDK (unless your JDK bundles it) and ideally IntelliJ IDEA.

1. Open the project in IntelliJ.
2. Set up the JavaFX SDK in the project settings if needed.
3. Run src/gui/App.java. It loads sample data and opens the GUI.

Storage is in-memory only, so everything resets each run. The sample participants, conferences, hotels and bookings come from App.initStorage().

KAS/
├── src/
│   ├── application/
│   │   ├── controller/
│   │   │   ├── BookingController.java
│   │   │   ├── CompanionController.java
│   │   │   ├── ConferenceController.java
│   │   │   ├── Controller.java
│   │   │   ├── HotelController.java
│   │   │   └── ParticipantController.java
│   │   └── model/
│   │       ├── AddonPurchase.java
│   │       ├── Companion.java
│   │       ├── Conference.java
│   │       ├── ConferenceBooking.java
│   │       ├── Excursion.java
│   │       ├── ExcursionBooking.java
│   │       ├── Hotel.java
│   │       ├── HotelBooking.java
│   │       ├── Participant.java
│   │       └── RoomType.java
│   ├── gui/
│   │   ├── App.java
│   │   ├── StartWindow.java
│   │   ├── AdministrationPane.java
│   │   ├── ConferencePane.java
│   │   ├── ExcursionPane.java
│   │   ├── HotelPane.java
│   │   ├── BookingWindow.java
│   │   ├── CompanionWindow.java
│   │   ├── ConferenceWindow.java
│   │   ├── ExcursionWindow.java
│   │   ├── HotelWindow.java
│   │   ├── ParticipantWindow.java
│   │   ├── AddonWindow.java
│   │   └── SearchWindow.java
│   └── storage/
│       └── Storage.java
└── KAS.iml

The controller logic all lives in Controller.java; the other controller classes are empty placeholders.