[hickelpickle]

Best learning resource imo is https://www.onjava8.com/ (it covers up to java 17)

Bruce Eckel is fairly well known for his original Thinking in java/c++ books, and I find his style of writing great. He has a knack explaining topics in an easily digestible thorough way, while not being completely dry. Its a 1200 page book, and can double as a reference, but actually explains the when, how and why in thoughtful writing enough to double as a great book for learning and a reference when needed. I knew a lot about java and learned a lot of little things about topics I already knew, and it breaks down each piece of the language so you can easily gloss over things you already may know from other from other languages.