XJ: Extensible Java (a proposal)

As said by many hackers repeatedly, especially PG, languages are slowly turning into their own versions of Lisp. Greenspun's Tenth Rule. When even Java starts having macros...

Personally, though, I think I would be against this. Adding too many such things would turn Java into a language as bloated and complicated as C++ is right now - as if the Java bloat wasn't enough already.