Dependency injection is an advanced topic. The term was coined by Martin Fowler in 2004 to describe the new, novel and almost magical way that inversion of control containers initialized the ...

Developers typically use field injection only on small projects and prototypes, due to its inability to support immutable variables and the incompatibilities it creates with many testing frameworks.

As dependency injection frameworks like Spring have become central in software applications in the last few years, the conventional view is now that the Singleton pattern is evil and should never be ...