Few questions

Hai thar /prog/  I'm 15, going into sophmore year of highschool, and getting to be decent with computers.  My last 2 computers have been built by me, I've done some game modding/scripting(Major TES fan), and I succesfully tri-boot gentoo lunix, freebsd, and XP.  Overall, I know a pretty decent amount of my shit, and I've just recently started getting into programming.  I've started out by learning Java, mainly because I want to take the AP exam for Comp Sci, and that means Java.  I bought a book to learn the language, and a review book for the actual exam.  My question, has anyone here taken the AP Comp Sci A or AB exams recently?  Suggestions?  Java isn't the most popular language from what I gather, so what should I learn after that?

>>1
Don't focus on learning languages; learn to _program_.  Syntax is easy to learn- you can pick that shit up in a couple hours if you're not a blithering idiot.  An actual understanding of how to use what and when to practically solve real-world problems is far more important and will get you much further in this field.