I live in Bakersfield, CA. I just graduated high school 2 months ago. And yes, I did that AP/Honors loading my last two years.
In any case, an i9300 is still overkill. If you plan to use it as your main computer for games, video, etc then it would be fine.
Java is taught in AP CompSci.
And unless your school offers a massive amount of AP courses, don't expect to complete more than a year of college work. Hell, I have 10 AP courses and I still have to go 4...