Can confirm. At work we're moving from Clojure 8 to Java 8 partially because IntelliJ is amazing and partially because Java 8 plus the right libraries is close enough to Clojure anyway, except much faster.
If any language had the tooling and development Java did it would hold the market share. It's my opinion that if Rust makes a similar IDE experience (even just using Eclipse's platform) with every feature like code completion, formatting, debugging, the hole 9 yards and integrate Cargo into it they'll win. But, here's the caveat: It needs to be FLAWLESS integration.
I've been a java developer for my entire programming career. Java was my first language when I was 12 and I'm 19 now. I still can't use javac without looking at a compiler guide since I never use it. Eclipse does the business and I don't ever even need to think about what's going on outside my code. Not once.
We had it in the form of Common Lisp, Smalltalk, Delphi and Visual Basic, IBuilder (for those rich enough), CA Objects, C++ Builder.
Started working and someone showed me how to productively use eclipse and suddenly it was acceptable.
Go is doing well because it realizes we can strip so much away, stay with the standard lib, and get real work done quickly.
That's not to say that Java, in particular the JVM, isn't an impressive piece of engineering, but more that we should be careful when we choose our tools so as to not overly complicate things.
Things like being able to jump to a definition, rename it throughout the project correctly and jump back without even thinking about it are hugely valuable in any language.
And maybe you have ways of doing that in your workflow too, in which case great, you too appreciate the value of good tooling.
I look at it similarly to the way I look at Smalltalk. It's possible to use it as just a series of text files (with GNU Smalltalk), but using it with tools that understand the language (such as Visualworks or Squeak/Pharo) turns it into a very different experience.
I know that a Smalltalk dev environment feels alive in a way that Java doesn't, but using Java with a tool like IntelliJ is a nice experience. Using something like JRebel or HotSwapAgent to swap code changes into a running application also improves the dev experience significantly.
its hard to find good examples of this style of coding. For example, it is hard to figure out which app server (Spring Boot, undertow, dropwizard, wildfly). I'm sure you can use any... but it would be nice to learn from your experiences.
This is an example of a project that is not UI centric, has quite a bit of database integrations (postgres), mailer integrations (mailgun), scheduler (https://dzone.com/articles/distributed-tasks-execution-and-s...). It has also has a bit of math to compute stuff.
Even without a UI - it is something that could be very useful!