Work on this in the following order:

Flight, Aircraft, Reservation, FlightManager, FlightReservationSystem, LongHaulFlight, Passenger. 

And then the exception handling in FlightManager and FlightReservationSystem as described below :)

Aircraft.java

Flight.java

FlightManager.java

FlightReservationSystem.java

LongHaulFlight.java

Reservation.java

Very important things to keep in mind:

Please make sure to avoid insufficient comments or bad program structure or bad use of inheritance and interfaces

Expected Outputs:

Aircraft: class Aircraft models an aircraft type (e.g. Boeing 747) and contains information about the model name, the maximum number of economy seats and the maximum number of first class seats (most often this is 0). Most of the code for this class is already written for you. You are to make class Aircraft implement the Comparable interface see the skeleton code for comments.