The main metaprogramming facility in Java is annotations. Some annotations work like higher-order functions, except that my advanced Java IDE is unable to find what function is wrapping the annotated function. Some other annotations work more like macros, but there's not a convenient way to evaluate the macro to have a look at the code it would generate.

I previously asked in another forum about this sort of thing and heard that I should read the docs. I suppose when working at a big company ships internal libraries that expose annotations and use inheritance extensively, but do not have docs, I should just pretend that I am not actually in such a situation, or something.