Airline seating Java assignment.

Design and implement a program that assigns seats on an airplane. Assume the airline has 20 seats in the first class (5 rows of 4 seats each, separated by an aisle) and 180 seats in evonomy class (30 rows of 7 seats each, separated by an aisle). Your program should take three commands: add passengers, show seating and quit. When passengers are added, ask for the class (first or economy), and the seating preference (aisle or window in first class; aisle, center or window in economy). Then try to find a match and assign the seats. If no match exists, print a message. Java code please!