[pabl0rg]

Baeldung has decently up-to-date tutorials.

Try kotlin instead of Java, and if you must use java, read the book Effective Java.

If you use kotlin, check out ktorm for db access, http4k for http api’s

[sk5t]

Baeldung's content is IMO uniformly quite deficient. If you want examples of how to do things poorly, which examples may or may not compile, or if there's no other alternative, then I guess read the Baeldung article.

Try Scala instead of Kotlin, it's much more powerful, and you can safely avoid the mad Scala libraries jam-packed with symbol infix notation.