Third party serialization libraries and other tools need to know the type of EnumSet elementType. Currently this field is package-private and said libraries have to resort to non-portable reflection hacks.
Please add EnumSet#getElementType() and EnumMap#getKeyType() methods. I've submitted this request to bugs.sun.com last month, where it received Bug Id: 9006352. There was no further communication and that bug is still not visible which doesn't surprise me as I've never had any luck with bugs.sun.com even when submitting actual bug :( PS. Please keep me CC'ed.
