These are the preferred way to get instances of Boolean, Byte,
Short, Character, Integer, Long, Float, and Double object.
It's always made sense for Boolean objects, and with 1.5 these factory
methods were blessed as the proper way to get instances unless one
absolutely needed a distinct object.
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4145 542714f4-19e9-0310-aa3c-eee0fc999fb1