How to learn advanced java knowledge modules such as socket, netty, concurrency, distribution, message queuing, etc.

< H2 > recently, I want to study the higher-level things of java and discover these abstract concepts. I would like to know how to learn these aspects more easily, or in what order to learn. I hope you seniors will give us some suggestions and plans. Thank you < / H2 >.
Apr.03,2022

you haven't mastered these, which means that your foundation is not solid, not only the java foundation, but also the computer foundation or programming foundation, such as computer principles, operating systems, data structures and algorithms, computer networks, design patterns and so on. Of course, it is quite boring to fill these foundations, and you can find answers from these foundations with your questions. Knowledge will continue to be profound in the process of mutual verification.

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