I am trying to make a web application to perform scientific and engineering calculations. I am new to web developing and I've been looking for a free framework (with free hosting), that's why I came to Google App Engine, but there is no way to get scipy working, so I decided to switch to Java instead of python (although I found PythonAnywhere and it has numpy, scipy, etcetera, it has no GUI-building support like PyQt, wx, Tkinter...).
I would like to know if there is a way to use COLT or so for Java in the Google App Engine, or if there is some other option. I would rather free options since I'm at college, but cheap-customizable-options are totally welcome :D (even if it means to use another language)
PD: I hope this was understandable since english is not my language.
EDIT: I TRIED to use apache commons math, and it seems like it's not going to work. The short answer to my question is: NO.