CarRentalSystem-using-Java-oops 4 basic pillars of oops implemented in this simple project workflow of this project : customer comes to the car rental service to rent a car system displays all the cars currently available for booking customer enters the carId and no of days for the rent system calculates total bill and genrates a report customer can cancel or confirm the bill car is gone for rent - then customer comes back to return the car and using the carId he/she returns the car future work adding rent date and time if returned after the original return date then apply fine add more functionlity generating a GUI(graphical user interface for interactive communication)