Caveat: I always avoid DI frameworks / libraries if possible. I just add an AppContext to all of my projects, then write "10,000 new()'s" in one place. That is my wiring. That said, I don't want to hate on people who are productive with DI frameworks / libraries. There is more than one way to do it well!

Real question: When Google Guice came out, there was a hype about it was better than Spring DI. Honestly, I think part of the hype came from their amazing PR, courtesy of "Crazy Bob". Have you tried it, and what did you think? If not, what other DI frameworks / libraries have you tried? Why did you prefer Spring? I am throwing zero share here. I am genuinely curious!