Any tooling you could imagine for a language java has that + 10 other implementations. Static analysis, debuggers, profilers, telemetry integration, metrics integration, etc. And these are GOOD. Java tooling, because it's pretty old at this point, is fairly well polished.
lots of java shops have loads of internal libraries that solve organizational goals or interface with other internal systems. they will continue to build new projects in java because the cost of tossing all that out is high.
