Joshua Bloch covers some highlights from the third edition of “Effective Java” – Info Java

But the second edition is about the same relative to the first edition (although I think generics were new…?). If you’ve studied the second edition the third edition is not very surprising, which takes away from some excitement but also means you don’t suddenly have to unlearn a lot. It’s certainly worth getting the third edition over the second edition but if you already own the second edition and studied up on java.util.stream there’s no need to rush out and buy the third edition.