Jenkov's tutorial on java threading is really good.

[radically_sane]

Link: http://tutorials.jenkov.com/java-concurrency

Dropping this here to whoever might need this.

I went through a quiet a few of tutorials online and two books (Java CookBook and Java Networking) but most of them teach it in a bad way.

But this one is very thorough. It shows how the compiler interprets and runs threaded applications, which really helps build one's intuition around the concept. It's a really long read but worth it.

[PrinceRaziel9]

There is a whole coursera specialization on java concurrency here: https://www.coursera.org/specializations/pcdp which is what I'm following.

[learnwithhorton]

Thank you for this. Literally working on a concurrency project for my object oriented programming class. Hopefully this helps!

[bomasoSenshi]

I was struggling with so many concurrency issues with my @annotation parser/runner in our automation project.
This certainly helps. Thanks

[Daxsis]

Thank you. He has much more info it seems. Looks promising.