If you give Java a try, it's got a lot more impact than Factory. Play around with the language a bit, there are things in the JVM and the language that really change the way you think about programming.
* What a great feature function pointers / procedural types / other call-by-name/reference-mechanisms were. (J8 lamdas are used like function references, but are kind of heavy)
* What a source of mystery "annotations" are.
Java started out like an interpreted version of Delphi or UCSD Pascal disguised as a cleaned up C++, but since 1.1 it evolved slowly and/or in the wrong ways.
Actually, as somebody who has been programming since 1983, in quite a few languages, Java brought little to nothing new to the table. Nothing personal against you, I'm just sick of the Java language/syntax and how it failed to live up to the hype.
* Best IDEs around. (Yes better than .net ecosystem)
* JVM monitoring (Flight Control, VisualVM)
* Performance Sampling/Profiling <1% perf cost
* actually being cross platform (yes, mono, bla)
People forget that Java has the best ecosystem of libraries bar none especially when you get into the more enterprise areas e.g. Big Data.
There is also a huge amount of features that are supported by the JVM that Java still doesn't make use of.
There is also a great JIT and garbage collector.