---
# System prepended metadata

title: Untitled

---

Here's an outline of the Java interfaces and classes for the core building blocks:

1. User Authentication and Registration: 
 
```java
 
 public interface UserAuthentication {
    boolean registerUser(User user);
    User login(String username, String password);
    User getUserProfile(int userId);
}

 
public class User {
    private int userId;
    private String username;
    private String password;
    // Other user-related attributes, getters, and setters
}
```
# Station Manager

 ```java
 public interface StationManager {
    Station getStationById(int stationId);
    List<Station> getAllStations();
    void addBicyclesToStation(int stationId, List<Bicycle> bicycles);
    void removeBicyclesFromStation(int stationId, List<Bicycle> bicycles);
    void configureStation(Station station);
}

 public class Station {
    private int stationId;
    private String stationName;
    private int capacity;
    private Location location;
    // Other station-related attributes, getters, and setters
}
```


# Bicycle  Manager
 
 
 ```java
public interface BicycleManager {
    Bicycle getBicycleById(int bikeId);
    List<Bicycle> getAllBicycles();
    void configureBicycle(Bicycle bicycle);
}

**Class**:
```java
public class Bicycle {
    private int bikeId;
    private String serialNumber;
    private String model;
    private BicycleStatus status;
    private Location location;
    // Other bicycle-related attributes, getters, and setters
}

public enum BicycleStatus {
    AVAILABLE,
    RENTED,
    MAINTENANCE,
}


 
 

```

**Class**:
```java
public class Booking {
    private int bookingId;
    private User user;
    private Bicycle bicycle;
    private LocalDateTime startTime;
    private LocalDateTime endTime;
    // Other booking-related attributes, getters, and setters
}

public interface UserInterface {
    List<Bicycle> getAvailableBicycles();
    Booking createBooking(User user, Bicycle bicycle);
    void returnBicycle(Booking booking);
}

```

#  Payment Gateway:
```java
 
public interface PaymentGateway {
    boolean processPayment(User user, double amount);
}
```
