Here are two lists for Java 5 which allow the moving (drag'n'drop) of the entries. They are not from me, I only cleaned and updated them. I also compressed the large number of source files into one.
The Draggable List (MoveList.java) is from Neil Cochrane. Original page
The Draggable Smooth List (JSmoothDropList.java) is from Timothy Wall. Original page
Download of both lists together with a test class: movelists.zip
Java Web Start
For webstarts, visit the original pages (see above). My test programs are ugly compared to theirs ;)
Dragable Smooth List: