This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Struts is smart enough to know when an object implements the Map interface, so all you have to do is give the key value as the property. For example, the following tag will display "java" in your example: