I understand that you are being taught java, and I am sure there are a lot of java developer job opening. But I have to tell you, as a software development company owner we stay as far away from java as possible and prefer to code everything in C#. Since we along with a majority of corporate business prefer and operate with the Microsoft platform (flame bate?). And even if we are required to write in a Ninux platform we would be using Mono (pretty much C# on Unix).

Other than that I also would agree with a below poster that learning SQL, even if rudimentary, would be of great importance.

All is not lost, java is an decent introduction into C#, and IMHO and easier language too.

http://www.microvision.com/ has been doing this for years with their Nomad displays.

Who ever thinks that prime numbers are random are insane. Prime numbers are simple to discover, and IMHO need to be a number base (1=1, 2=3, 3=5, 4=7, ...) on their own.

Primes by definition are numbers not covered in a repeating sequence. So to identity them in number line:
Make N the last prime, remove every Nth whole number, then the first remaining number is the next prime. continue.

[example]
remove every 2 entry then the first remaining number, and next prime is 3.
remove every 3 entry then the first remaining number, and next prime is 5.
remove every 5 entry then the first remaining number, and next prime is 7.
remove every 7 entry then the first remaining number, and next prime is 11.
remove every 11 entry then the first remaining number, and next prime is 13.

I have theorized (just a simple man) that primes could be identified by:

• Using a compounding light wave and identifying the lowest intensity frequencies
• A cross bar chip cdeveloped using nano scale lines to identify a number as its prime components, up to some limit.