A modern programming language that makes developers happier.

kotlinlang

I'm so glad I never even tried to use Jack... Google does this strange thing of trying to rewrite everything. There was ABSherlock, they made ABCompat, there was Dagger, they made Dagger 2 (which I never used in prod and preferred Square's version, was less boilerplate to provide multiple implementations in tests). Now they made a good decision to drop it for all the APT or Lombok users, or even Jacoco, lint or instant run fans.