Design/Implementation
+++++++++++++++++++++

My implementation of this problem uses a Producer-Consumer type design.

First we have our RequestItem.java, this is an Event object that stores the details 
of an individual person getting the elevator. When the person is created their
request is added to a Queue. There is a Queue for each floor in our Airport.

Next we have our StoreRequests.java Queue, this stores a Queue of RequestItems in
a ConcurrentLinkedQueue.
 
The Person.java thread produces a new request item on random intervals. Each person
has a random starting floor and a random destination floor, they also each have a
unique id.

The Elevator.java thread has it's own Request queue, it stores what floors the people
are going to in it. When our elevator is on a floor it empties all the people who want
to get out at this floor. It then takes any people waiting on this floor.

This stores all output to "output.dat"


Problems
++++++++

There are a few problems with my implementation, they are listed below.

I don't correctly deal with capacity, it's possible for there to be a capacity of 11
if the first person in the queue on a certain floor has a weight of 2.

My elevator is very naive and simply goes up and down sequentially, it doesn't skip
any floors and also visits floors without anyone on them.

I don't register the time each person is created or leaves the elevator.