Recently @hipertracker wrote that I do not know Java, with sadness I must write that he may be right... At university I staudied mostly C++ strictly academicaly, then I wrote some Java and C# projects and in last year I choose Java, particuary JavaFX for my B.Sc. With knowledge of C++ I was able to read one short book about JSE, and one about Servlets to start coding. By now I think that ther is no way to continue my journey without any *good* book about Java. Thats my conclusion. So what do you recommend? And I still think my tests were quite good, maybe except java, but I know that in first place becouse It was too fast for me. But for my simple test I have about 60% of confidence that: Java and Scala in speed are similar(linear problems), Groovy is slow. I was reading a book about Groovy: Pragmatic Groovy about 2 months, I was a good book. If anyone is interested in Groovy I can recommend it. But if you find something newer it will be even better ;) I will abort ...