Final Year University Project - School Automation System

Hello All,

Im going to choose a framework for my Final Year Project. I actually intended to make a Desktop Application which will have nothing to do with online stuff. It will be a data aware application lets suppose a "School Automation System" like records of students, performance, results, teachers, salaries etc.

Now i have two options only
First to Choose Adobe AIR, as i feel comfortable enough to work with Adobe Flex and Actionscript 3.
Second Choice is, Java, Which will take extra time for learning etc.

So i want to ask you guys to suggest me whether Adobe AIR is suitable for me or not?
I just want to built a data aware application, nothing to do with hardware interfacing etc.

So do you guys think that Adobe AIR can be used to make a database application which will have records in GBs?
What kind of limitations are here?

Thanks a lot for your concern