Code Explanation

Main.java : Application entry point. It loads the Reserve.fxml layout file (which defines the user interface). Sets up the main application window (title, size). Displays the GUI.

public class Main extends Application {

@Override

public void start(Stage primaryStage) throws Exception {

Parent root = FXMLLoader.load(getClass().getResource("Reserve.fxml"));

primaryStage.setTitle("Hotel Reservation System");

primaryStage.setScene(new Scene(root));primaryStage.show();

}

public static void main(String[] args) {

launch(args);

}

}

Customer.java: This is a plain old java object that contains data about a customer. It is a data structure that holds information about a customer and used to present customer information in tables or forms. Encapsulates customer attributes with appropriate getter/setter methods.

public class Customer {

private String name;

private String phone;

private String email;

private String roomNumber;

private String checkInDate;

private String checkOutDate;

// Constructors, Getters, and Setters

}

Room.java: This class stores information about each hotel room. Represents rooms and their availability and is used to populate room lists and room search results. Allows for the dynamic change of room availability when booked.

public class Room {

private String roomNumber;

private String roomType;

private boolean isAvailable;

private double price;

// Constructors, Getters, Setters

}

reserve.xml: this defines the UI for room reservations using XML. A table for showing room info (TableView) Text fields for entering customer details Buttons for actions like Reserve, Check-In, Check-Out

<TableView fx:id="roomTable" ... />

<TextField fx:id="nameField" />

<Button text="Reserve" onAction="#handleReserve" />

ReserveController.java: This java class connects the Reserve.fxml UI to logic.Connects UI events (like button clicks) to backend logic. Validates form data. Communicates with the database class to store or retrieve data.Updates UI components like table views after changes.

public class ReserveController {

@FXML private TextField nameField;

@FXML private TableView<Room> roomTable;

public void handleReserve(ActionEvent event) {

// Get selected room

Room selectedRoom = roomTable.getSelectionModel().getSelectedItem();

// Get customer details

String name = nameField.getText();

// Save to database

Database.insertCustomer(name, selectedRoom.getRoomNumber());

// Update room status

selectedRoom.setAvailable(false);

roomTable.refresh();

}

}

Database.java: Opens and manages connections to the SQLite database. Executes SQL queries (INSERT, SELECT, UPDATE). Provides methods used by the controller.

public class Database {

public static void insertCustomer(String name, String roomNumber) {

String sql = "INSERT INTO customers (name, roomNumber) VALUES (?, ?)";

try (Connection conn = DriverManager.getConnection(DB_URL);

PreparedStatement pstmt = conn.prepareStatement(sql)) {

pstmt.setString(1, name);

pstmt.setString(2, roomNumber);

pstmt.executeUpdate();

} catch (SQLException e) {

e.printStackTrace();

}

}

}

CustomerList.fxml: This screen shows a TableView of all customers and includes filters. It is used for viewing and filtering customers based on their reservation status.Dynamic updates as users check in or out.

<ChoiceBox fx:id="statusFilter" />

<TableView fx:id="customerTable">

<columns>

<TableColumn text="Name" fx:id="nameCol"/><TableColumn text="Room" fx:id="roomCol"/>

</columns>

</TableView>