1. Generics. And yea, I know Go is getting generics "Real Soon Now" (tm), but it is incredibly annoying to write the same collection code over and over and there's some third-party libs that would really benefit from generics (looking at you Azure Go SDK).

2. Error handling... with the big caveat that I actually like Go's error handling mechanism at small scale but wish there was a good way to chain several operations together and return an error to the top if any failed... I find myself writing a lot of `err != nil` checks in sequence and I've found baking my own abstractions around this to be leaky or difficult to grow as the program requirements change.

3. Diverse collections API.

4. Iterators.

5. Not Java-the-language but the JVM has amazing monitoring tools.

> I assume verbosity of the code is still the defining characteristic of Java?

Pound for pound... I think Go and Java have about the same verbosity. I'm honestly never quite sure what people mean by "verbosity" in Java. Generally I interpret this as "frameworks" but I predicated my OP on the idea that legacy framework bloat is where most of people's frustration with Java lies... not the language itself.

Java improved with "var" keyword (use with caution!) and introduction of records. These are not the only code-shortening features (there are e.g. interface methods, diamond operator, lambdas, convenience "of(...)" methods, even "fluid style"), but they, used well, can really reduce verbosity.

If you have a hammer everything’s a nail.

I think Java 11 and higher are reasonably terse/expressive without being overly dense.

So far the only reason I’ve concluded is Java’s language designers’ egos were so damaged by C#, Swift, Kotlin, TypeScript, etc that after dogmatically denying the developer-productivity benefits of properties for the past 20 years that to concede now would mark the end of Java as a language entirely.

...I kid, but seriously I haven’t heard any compelling argument from the Java camp yet for refusing to add this feature. Object-properties are easily the lowest-hanging-fruit with the biggest productivity-gains.

Heck, even some of the most popular C++ compilers support object-properties as proprietary extensions.

I think the current future view is Withers ( https://github.com/openjdk/amber-docs/blob/master/eg-drafts/... ).

So I did some small standalone projects and demonstrated how much easier life was with this and other (more significant) changes. For example, we had loads of operational problems with dependency injection - the usual cognitive and debugging issues - so I threw all of that out too, along with the frameworks that implemented them. Things started booting in a few seconds instead of minutes and I’d say the lack of setters/getters was mostly done because I built trust in my team that I was making their lives better so they just followed me.

Probably not the answer you were looking for but there was friction from the devs and in the end I just showed them how much nicer life could be...

The type system is not strong or expressive enough to do full type erasure, but then we're stuck with type-erased generics, so it's just incredibly frustrating.

The stdlib often seems to be written by people who had no intention of using it. I guess maybe this applies to C++ as well, so for some folks it seems normal.

In modern Java maybe you can make do with functional interfaces and lambda, but it doesn’t always work I think.

And in emacs: the provider does run-hooks, and the consumer defines a function and says add-hook. Done. Very little ceremony.

Disclosure: I work for VMware, which sponsors Spring development.

[0] https://spring.io/blog/2021/03/11/announcing-spring-native-b...

[1] https://github.com/spring-projects-experimental/spring-fu

https://wiki.c2.com/?RavioliCode

DI is a powerful concept, but Spring projects rely on DI in such a generic way that it often doesn't even make sense for your application. You have to gain intimate knowledge of the abstractions, and inject a bunch of code in a bunch of places just to make it do the very-straightforward thing you were trying to do.

You don't really need dependency injection if there is only single choice of what to inject. You can just refer in code to the only possible component.

Not sure what you mean by that. I thought that interface/implementation divide is the way to implement virtual calls. Unless you want testing frameworks to do bytecode instrumentation.

If you just create a class A in java, no interfaces involved, class A will have its methods virtual. I'm not sure what do you mean by interface/implementation divide.

Running ‘dotnet build’ is much more saner and one can reasonably understand what happens.

> 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.

  hasThing := false
  for _, v := range stuff {
    if checkForThing(v) {
      hasThing = true
      break
    }
  }
  if !hasThing {
    return false
  }

  if !stuff.stream().anyMatch(v -> checkForThing(v)) {
    return false;
  }

    return stuff.stream().anyMatch(this::checkForThing)

Skipping java and instead using Kotlin allows one to reuse all that knowledge in a great language as well.

Java the language is ok. The culture (which is part of the ecosystem) and how you're pushed to write code is the biggest problem with Java. The wide array of tooling, frameworks, and libraries within the ecosystem is nice.

But the way you have to use them tends to be shit due to the culture surrounding the language. At least it seems to be shifting to something more sane.

Edit: I still think Java is a good language, especially later versions, and both original goals and recent advances are quite noble.

Of course one can show empathy and understand justifications for things they like and simply laugh out "LOL Go No Generics' when they don't.

What first-party stuff are you referring to?