Getting subset from collection

[Dave Bender <db...@umn.edu>]

Is there a utility somewhere in Struts or the Commons that pulls subset of
objects from a collection based on a String array of values?

Here's what I mean:  I have a collection of objects that have label and
value fields so I can use them in the Struts multibox tag.  Struts returns a
String array of the values that were selected.  Now I want to get a
collection of the objects the user selected based on the contents of the
String array.  So, they selected item 5, 19 and 23.  I'm looking for a
one-step way to pull objects 5, 19 and 23 from a collection of all the
objects.

I've looked at the Collections methods but don't see a way to get anything
but one item from a HashMap.   I've looked at BeanUtils, but couldn't find
anything.  So, I'm iterating through the collection, which works, but it
seems like such a common routine that it'd already be available.  Is it?

Dave