You are to write a program name elevator.java that simulates elevator services in a 12-floor building. There must be one elevator working this building.

Here are some requirements for the program:

1. The floors of the building are numbered 1 to 12.

2. The Initialization Phase: Randomly generate 8 floors to stop whilst going UP (No repetitions) and 5 Floors whilst going DOWN (no repetitions). USE ARRAYS :- UPARRAY and DOWNARRAY respectively. If the last stop going up was at floor 10, and a request was made from floor 12 to go down, then the elevator must go up to floor 11 to satisfy that request.

3. HINT: A good idea is to sort the UPARRAY in ascending order and sort the DOWNARRAY in descending order.

4. The elevator must be located on the 1st floor and the first request is made which must be a request to go up.

5. From the 1st floor, the elevator can only go in one direction - up. And from the 12th floor the elevator can only go in one direction - down.

6. If the elevator is on a given floor and is going down, then it could be used only to go down. Thus the direction in which the elevator is going must be known at all times and the floor to which it is going. If the elevator is going up, the request could be anywhere from floor 2 to 12. If it is going down, it can be from 12 to 1, with 1 being the default.

7. The location of the elevator must be known at all times. The program should provide output regarding the current floor, whether the elevator is going up or down, which floor it is starting from and which floor it is going to, as the following output will show:

8. To travel from one floor to another, it will take 2 seconds and the elevator will stay for 3 seconds at each floor.

9. Display at least the waiting at each floor - Flashing the count of the seconds. 

Attachment:- assigment.doc