How do I protect and market my code?

Basically I had a over the summer assignment which I used to develop a piece of software which I guess will sell around 50 - 70 bucks a copy.

To make this clear. The final code is in Java (a requirement).

Now I was think about marketing my little creation however I'm faced with two problem:

1, I need to provide full documentation to the Lecturers. How do I go about preventing them from stealing my code/methodologies used? Would simple copyright be enough?

2. How do I bundle the software? How do I sell it? Should I partner with a publisher or should I just sell the code to a software company? I will need bi-yearly maintenance at least.
How do I protect said software from getting cracked?

How /prog/ has some experience on this already!
Thanks for helping out!

>>23
where 180 hours is how long it took him to write said magnum opus, and 50 bucks is what he sold the one single copy for.

$ echo "scale=2; 180 / 50" | bc
3.60
$3.60 / hour

Congrats OP a worker doing the most menial job you can think of made more than you did over the same period of time.

>>24
Congrats OP a worker doing the most menial job you can think of made more than you did over the same period of time.
What if the guy goes to live in India?  I'm not up on how much the average over-seas rentacoder makes, but I bet $3.60 USD is an OK wage for a programmer over there.

In any case, I'm interested in what OP's product is actually for.  Even if he can't tell us exactly what it is.

>>25
If the guy lives in India the cost of living is scales such that so that $US3.60 is actually a pretty good gig.
It's all relative yanno?
But just so you know I'm referring to places in the world where people want to live, you know places that don't have outdoor plumbing...Civilized places, in other words.

>>25
I bet in india you can pay the expences for a whole day with 3.60 USD.

Why are we assuming he sells one copy?  Seems like if one person would buy it, someone else would too, eh?  But probably not even that.

>>28
why are we assuming anyone would buy it?