[unknownAttacker]

Code:

first of all, Java is painfully slow.

That was true before they used JIT, but that has been a couple years ago.
Also--keylogging is not a task that needs much speed, is it?

running Java program constantly still slows you down noticeably, especially on older computers and/or computers without virtualization

Ahh, I figured that Java wouldnt be up to the task, since it's quite a high level language, i'll look into a lower level language (like you say C++ would be ideal)

you can use high level languages, just make sure they're efficient and not virtualized. but C++ is a good idea too