I just recently started to learn Java and well... If anything I'd think it should work on Windows 7 (unless they blocked it so people use VB instead.. doubts.)
Windows 7 is based on Windows NT (same as XP and Vista?).
If it works on Vista and XP, I wouldn't doubt if it works on 7 as well.
I am wondering if <a href="http://www.javlicious.com">jav</a>a is not supported in windows 7?