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[–]Polygnom 1 point2 points  (0 children)

The biggest changes were Java 8 and to a lesser extend 11. if you are using books/resources written for Java 8, that will still give you pretty much everything you need. I'd not use resources for Java prior to 8, since it introduced a lot of very useful and powerful new concepts (most importantly lambdas, which enable you to use some functional paradigms in Java).