please make cash register using gui application and java programming language. Like the cash register in mcdonalds. i just want to see how it works. My program is not working.

Then post your code and show us what isn't working.

hmm, so you need to control a touch screen, electronic payment terminals, and things like that as well?

¡Vaca sagrada!
You're trying to write (on and for a computer) a cash register program that would work if it were run on a cash won't work so well unless you have the proper peripherals.
You might be eating at McD's too often if you have become enamored with their cash registers.

...unless you're interested in money stuff in general, in which you just like $, and who doesn't?

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