> The TerrariaClone.init() method, which is over 1,300 lines long, actually grew so large that the Java compiler started running out of memory trying to compile it!

Seems surprising, 1.3kloc doesn't feel that big in the scale of things. I wouldn't be surprised if some of the methods at $work would be on the same scale, and it compiles just fine (relatively speaking..). And based on quick scroll-through, there isn't really anything especially egregious in there that would point towards why the compiler fails.