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?

For something completely different, pick up some assembler.  Maybe not for x86 but something a little simpler, like AVR.  This gives you a very good idea about hardware, operating systems, and of course C code.
The best set:
C/C++ because it underpins everything
ASM, because it underpins C
LISP so you appreciate data structures, recursion, and functional programming
Java because it is all throughout the education system
C# .NET because having money is nice

Or you could go JavaScript, Java, ActionScript, SQL, Perl, PHP, XHTML and CSS and make money as a WebDev. These are all quite easy, so you won't get respect here.