HK2 - A light-weight and dynamic dependency injection framework

HK2 is a light-weight and dynamic dependency injection framework. HK2 is an implementation of JSR-330 in a JavaSE environment. JSR-330 defines services and injection points that can be dynamically discovered at runtime and which allow for Inversion of Control (IoC) and dependency injection (DI).

HK2 provides an API for control over its operation and has the ability to automatically load services into the container. It is the foundation for the GlassFish V3 and V4 application servers as well as other products like Jersey.