Design Patterns in Java (and EJB) References

Three high quality free resources (eBooks & website) for learning about design patterns in Java & EJB for your reading pleasure.

Design Patterns in Java - A free eBook which extensively covers wide range of design patterns with good examples.

EJB Design Patterns - A well written book.

Basic design patterns available online. It is adapted from the famous Design Patterns book by Gamma, Helm, Johnson and Vlissides (gang of four).