Java. What would you like to learn?

Question

Java

I'm learning java. For the most part, I am familiar with Java Core (if I understand the essence of this value correctly).
Lagging topics are Generics and Lambdas, which are rarely used, so I only know the basic syntax. I'm slowly learning the java library. Java lang ,java io , Collections . Stream Api is in the plans, and there may be reflection. Shield's main source of information is java The complete manual and documentation for java se.
So, I would like to ask for advice in the right direction, am I moving or is it worth studying something else.
And what are the tasks to set for yourself? I mainly write small programs to consolidate the material.
Of the larger projects, it was mainly a simple multi-user tcp chat to fix the information about multithreading and a simple interface on SWING.
Should I now learn Fork/join or spring/play, or is it better to study the standard library better?
I also want to try to do something on android, but is it worth spending time on this in this situation?
Thanks for answers.

Answer 1

It is worth studying what will be asked at the interview. To find out what they will ask at the interview, you should look at the requirements for a particular job.

Answer 2

"Of the lagging topics, these are Generics and lambdas, which I rarely have to use, so I only know the basic syntax. I'm slowly learning the java library. Java lang ,java io , Collections . There are stream Api plans, and there may be reflection. The main source of information Shield is java Complete guide and documentation java se. "
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"Should I learn Fork/join or spring/play now or should I study the standard library better?" - see an example here javarules.ru/java-8-parallel , you can even do it yourself in a couple of hours, everything is very simple there. You can use any IDE for this.