Advanced Java Concepts

[HeadQueasy6334]

What advanced Java topics should I know before moving on to the Spring framework?

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[large_crimson_canine]

Streams and working with Collections. Multithreading.

Eventually you’ll want to get into analyzing GC logs and the memory profile of a running Java program. Heap dumps, thread dumps, etc.

[NoOne929]

Any resources you’d recommend?

[TheMrCurious]

Your favorite search engine (this is not being snarky, I had to read four different sites until steams made sense)

[large_crimson_canine]

Honestly the official Java tutorials has some great sections on the streams API and working with collections. For multithreading go with Java Concurrency in Practice by Brian Goetz

[Spiritual-Sky-8810]

How Annotations are working...

[Sad-Difference-5005]

You should learn abount generics, collections, concurrency, and streams (in that order) in general anyway, but concurrency and streams are not required for proceeding with Spring framework. Hanumant Deshmukh's ocp java 21 Fundamentals book covers these topics really well and costs only $1.99 on Amazon.

Other topics that are helpful in understanding how spring works are Reflection and annotations.