This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Managed classes mean, the classes that are managed by the container. These can be Servlets, EJBs, JSF Backing beans etc. However, these cannot be Helper Classes that can be custom defined to provide for some specific functionality.
Since DI happens courtesy of the container, helper classes cannot access DI.