Jelly Beans can be created with the define tag library. A Jelly Bean is where a regular Java Bean can be bound to a Jelly tag
Who else thinks they named it just so they could make this stupid joke?
Fucking hell, though, Apache names shit horribly. "Hadoopi" sounds like an Indian word for "poopy time" or something. STICK TO YOUR BLOATED CORE SERVER TECHNOLOGY, GUYS.