CodeAlphaHotelReservationSystem.java

import java.util.ArrayList;
import java.util.Scanner;

class Room {
    int roomNumber;
    String category;
    boolean available;

    Room(int roomNumber, String category) {
        this.roomNumber = roomNumber;
        this.category = category;
        this.available = true;
    }
}

class Booking {
    String customerName;
    int roomNumber;

    Booking(String customerName, int roomNumber) {
        this.customerName = customerName;
        this.roomNumber = roomNumber;
    }
}

public class CodeAlphaHotelReservationSystem {

    static ArrayList<Room> rooms = new ArrayList<>();
    static ArrayList<Booking> bookings = new ArrayList<>();
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {

        rooms.add(new Room(101, "Standard"));
        rooms.add(new Room(102, "Standard"));
        rooms.add(new Room(201, "Deluxe"));
        rooms.add(new Room(202, "Deluxe"));
        rooms.add(new Room(301, "Suite"));

        int choice;

        do {
            System.out.println("\n===== HOTEL RESERVATION SYSTEM =====");
            System.out.println("1. View Available Rooms");
            System.out.println("2. Book Room");
            System.out.println("3. Cancel Booking");
            System.out.println("4. View Bookings");
            System.out.println("5. Exit");

            System.out.print("Enter Choice: ");
            choice = sc.nextInt();

            switch (choice) {
                case 1:
                    viewRooms();
                    break;

                case 2:
                    bookRoom();
                    break;

                case 3:
                    cancelBooking();
                    break;

                case 4:
                    viewBookings();
                    break;

                case 5:
                    System.out.println("Thank You!");
                    break;

                default:
                    System.out.println("Invalid Choice!");
            }

        } while (choice != 5);
    }

    static void viewRooms() {

        System.out.println("\nAvailable Rooms:");

        for (Room room : rooms) {
            if (room.available) {
                System.out.println(
                        room.roomNumber + " - " + room.category);
            }
        }
    }

    static void bookRoom() {

        sc.nextLine();

        System.out.print("Enter Customer Name: ");
        String name = sc.nextLine();

        System.out.print("Enter Room Number: ");
        int roomNo = sc.nextInt();

        for (Room room : rooms) {

            if (room.roomNumber == roomNo && room.available) {

                System.out.println("Payment Successful!");

                room.available = false;
                bookings.add(new Booking(name, roomNo));

                System.out.println("Room Booked Successfully!");
                return;
            }
        }

        System.out.println("Room Not Available!");
    }

    static void cancelBooking() {

        System.out.print("Enter Room Number to Cancel: ");
        int roomNo = sc.nextInt();

        for (Booking booking : bookings) {

            if (booking.roomNumber == roomNo) {

                bookings.remove(booking);

                for (Room room : rooms) {
                    if (room.roomNumber == roomNo) {
                        room.available = true;
                    }
                }

                System.out.println("Booking Cancelled!");
                return;
            }
        }

        System.out.println("Booking Not Found!");
    }

    static void viewBookings() {

        System.out.println("\nCurrent Bookings:");

        for (Booking booking : bookings) {
            System.out.println(
                    "Customer: " + booking.customerName +
                            " | Room No: " + booking.roomNumber);
        }
    }
}