every oops concept, what's the next step now? @AnyExperiencedDev
There're much more to learn in core Java besides OOP. The first vital thing I'm thinking about is concurrency. Another even more important is collections. Well, there's much more - I/O, networking, nio, regexp, etc. While these are not as important as collections and concurrency, you must at least be a little bit familiar with them. The next step is obvious: check jobs market in your country. Find the framework that is most widely used in your country, and start learning it. When you're pretty solid with it, choose second and third ones by available jobs and learn them but much more superficially just to understand difference in core concepts.
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