The part of Java that I hate is having to read a whole lot of documentation about features and libraries that I do not want to use, and will strive not to use, and that I may not even have to use, and that the best critics agree are ugly as sin and overdesigned and counterproductive, but which I still need to understand because they're the standards.
Which Java features and libraries do you need to learn how to use (even if you never need to use them) to get started in Clojure?
I ask this as someone who is completely unfamiliar with Clojure, not to be snarky. But from everything I've read, it has always sounded to me like you could get started in Clojure without knowing anything more about the Java environment other than the fact that your code is running of a JVM.