The loosely coupled metaprogramming of frameworks like Spring is an indication of how feature-poor Java is in those areas. Autowiring and mocking should be first-class features with dedicated syntactic elements, rather than something that's handled by third parties with opaque annotations that mean nothing before the application is run.

I understand that Java wants to remain conservative with its development roadmap, but the fact that the majority of an ecosystem uses a third-party framework is a good reason incorporate something similar into the language.