Which kind of Java do I need?

I've programmed in java before, but mainly just console programs and small applets. Now I need to do something meaningful. I need to create a massive program for a restaurant and figured it should be done in java so the code would be transferable between multiple platforms, as it will contain lots of graphics. My question is, what kind of java do I code it for? There will be intense networking in it, but it's not an applet, rather just a program that can run on top of windows, or linux, or whatever os it is used on, provided we have the correct java package installed for the given os. I saw Java API, servlet, and a whole collection of other styles of java. I'll need to be able to do graphics with mouse functions, writing files accross a network, and printing accross a network for the most part. It will use a touchscreen in the end that will emulate mouse functions. Does anyone have any ideas as to what I'm talking about and what I might need? Does anyone have any suggestions for books I should look at?

I'm going to assume that your writing a point-of-sale system, and that you'll have check-out points, and stations for waitress to create checks. Please correct me if i'm wrong.
Anyhow, I'm lazy and cheap. I'd use J2SE to write 3 programs -- 1 console program and 2 gui programs.
the console program will be a Server. This will be the program to which all your other programs will connect to so that all your data will be in once place (i.e. a waitress can create a check at a station, and the
check will be avaliable on the server so that you can retrieve it at a check-out point)
Note: the server should be a console program to reduce overhead. (i.e. no wasted time on useless graphics)
The two gui programs would be:
1) A program for creating/modifying checks for waitresses to use
2) A program to "clear" or bill for a check (next to the cash register)
Both programs would connect to the console server program.
If you use a database (which you definantly should!) you could
also write a program to generate reports baised on data you collect
from the waitress stations and the cash register (i.e. # of people who
walked out on checks, highest/lowest selling food, most profitable
food, busiest/slowest times of the day, etc.)
Lets hope I'm not wrong!
--Dave

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