My advice to you - if you want to be more relative to HR keywords like "Spring", choose your path in diving to Spring Boot and ecosystem. I know there're many of frameworks in java, but in my opinion Spring Boot is more close to "right way" of learning "something".
Do you know about Kotlin ( kotlinlang.org ) ? It is maybe the next step after java (Without Oracle !).
Next step after "Java language" or "Java platform"?
Well, what do you think of this kotlin thing ? :) I've just read a litle about it...
IMHO, to force your confidence with area of programming, don't look at things like "wow a new shiny hammer, for all of hobnails". Practice with tools grows your skill with tool, not with fundamental aspects of hammer itself. It's like an ABC in school.
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