You have been asked to write a simulation program for an airport IN JAVA. The simulation will specify the number of runways and generate a file representing scheduled flight arrivals and departures. A runway can only be assigned to one flight at a time. All arrivals and departures will reserve the runway for a specified amount of time respectively.

Since it is more expensive and dangerous to keep a plane waiting to land, arrivals have priority over departures. This means that a runway will be assigned to a plane ready to land before being assigned to any plane waiting to take off.

Assignment:

Create a AirportSimulator class that extends the provided Airport abstract class

Feature	Signature	Requirement
Constructor	AirportSimulator (int numRunways)	Precondition: numRunways >= 1; Postcondition: airport simulator with specified number of runways and default arrival and departure runway reserve times;
	AirportSimulator(int numRunways, int arrivalReserveTime, int departureReserveTime)	Precondition: numRunways >= 1, arrivalReserveTime >= 1, departureReserveTime >= 1; Postcondition: airport simulator with specified number of runways and arrival and departure runway reserve times (in minutes);
Methods	public void processEventFile(String filename)	Precondition: filename contains path to the events file; events file is pipe-delimited file containing the scheduled time, event type (ARRIVAL or DEPARTURE) and a Flight ID.
	public Event[] getFlightsHandled();	Returns an array of all flights processed