[pgwhalen]

Not OP, but...

> More seriously, what are you missing in Go that is well-done in Java?

As cliche as it is to say, Go missing generics (for the time being) does hold it back in many ways relative to Java. I like and use both languages regularly, and as I thought about my answer to this question I realized that essentially all of my complaints stem from the lack of generics - things like streams, a rich collection framework, and non-channel concurrency features (java.util.concurrent among them) don't exist in go because you can build them as generically as needed for them to be useful.

You might have said "well-done" as a way of excluding generics in Java since many people like to suggest they're not well done; of course most developers would like more, but they already enable an enormous amount of stuff not possible in Go.