```java
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.HashMap;
import java.util.Map;
class Reservation {
private LocalDate date;
private LocalTime time;
private int numberOfGuests;
private String customerName;
public Reservation(LocalDate date, LocalTime time, int numberOfGuests, String customerName) {
this.date = date;
this.time = time;
this.numberOfGuests = numberOfGuests;
this.customerName = customerName;
}
public LocalDate getDate() {
return date;
}
public LocalTime getTime() {
return time;
}
public int getNumberOfGuests() {
return numberOfGuests;
}
public String getCustomerName() {
return customerName;
}
}
class ReservationSystem {
private Map<LocalDate, Map<LocalTime, Reservation>> reservations;
public ReservationSystem() {
reservations = new HashMap<>();
}
public boolean makeReservation(LocalDate date, LocalTime time, int numberOfGuests, String customerName) {
if (isReservationAvailable(date, time)) {
Reservation reservation = new Reservation(date, time, numberOfGuests, customerName);
if (!reservations.containsKey(date)) {
reservations.put(date, new HashMap<>());
}
reservations.get(date).put(time, reservation);
return true;
}
return false;
}
public boolean isReservationAvailable(LocalDate date, LocalTime time) {
if (!reservations.containsKey(date)) {
return true;
}
Map<LocalTime, Reservation> reservationsByTime = reservations.get(date);
return !reservationsByTime.containsKey(time);
}
public Reservation getReservation(LocalDate date, LocalTime time) {
if (reservations.containsKey(date)) {
Map<LocalTime, Reservation> reservationsByTime = reservations.get(date);
return reservationsByTime.get(time);
}
return null;
}
}
public class Main {
public static void main(String[] args) {
ReservationSystem reservationSystem = new ReservationSystem();
// Make a reservation
LocalDate reservationDate = LocalDate.of(2023, 7, 5);
LocalTime reservationTime = LocalTime.of(19, 30);
int numberOfGuests = 4;
String customerName = "John Doe";
boolean isReservationMade = reservationSystem.makeReservation(reservationDate, reservationTime, numberOfGuests, customerName);
if (isReservationMade) {
System.out.println("Reservation made successfully!");
} else {
System.out.println("Reservation is not available at the specified date and time.");
}
// Check reservation details
Reservation reservation = reservationSystem.getReservation(reservationDate, reservationTime);
if (reservation != null) {
System.out.println("Reservation details:");
System.out.println("Date: " + reservation.getDate());
System.out.println("Time: " + reservation.getTime());
System.out.println("Number of guests: " + reservation.getNumberOfGuests());
System.out.println("Customer name: " + reservation.getCustomerName());
} else {
System.out.println("No reservation found at the specified date and time.");
}
}
}
```
In this example, the `Reservation` class represents a reservation with properties such as date, time, number of guests, and customer name. The `ReservationSystem` class manages the reservations and provides methods for making a reservation, checking availability, and retrieving reservation details.
The `makeReservation` method checks if the specified date and time are available and creates a new `Reservation` object if they are. The `isReservationAvailable` method.
1 Comments