Comment by cess11

If someone reads this and wonders what JBoss is, the contemporary variety is called WildFly and it is actually rather easy to install and play around with.

https://www.wildfly.org/

I think this is an often overlooked solution to some of the problems we nowadays tend to approach the clown for.

As for build systems, Maven is old and cranky but if something else replaces it, it will probably be quite similar anyway.