Java - how to dive quickly?

Question

Java

How to quickly explore the Java ecosystem and best practices for a pedant (Symfony + Doctrine)? There was a task to write a plugin for the keycloak system from jboss. I installed Idea, wrote the plugin, somehow collected jar from src and pumped it into lib from some maven dependencies. Works. But I'm sure it's all wrong. And, apparently, plugins will need to be done a lot more. I would like to do it wisely, so that it would be easy myself, and if someone with a good knowledge of Java then develops it, then I can safely leave my address in the comments :) What can I read? English, Russian or Ukrainian will do.

Answer 1

Read the latest version of Effective Java . As suggested by illuzor , there is already a publication in Russian
There are a lot of articles on maven, a couple is enough to understand. He is simple.

Answer 2

1) Read a book on patterns in PHP (there is a good book)
2) Read a Java book for beginners (get familiar with Java syntax - it's a bit more complicated than in php).
3) Read a book on enterprise patterns in Java
4) Read a book on Spring development (there you will see how patterns are used within the framework of the Spring platform).
5) Watch a couple of tutorials from Hindus on maven / gradle
6) Open the Java dock on the platform you need and start writing code.
7) In the process of writing code, you will improve your knowledge of Hibernate, thymeleaf, the Java eco-system, and more.
Ps "...Ukrainian will do" - Are you serious? =) Do not confuse patriotism with stupidity.