This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Actually, most of the API classes have overloaded methods / constructors that take a Comparator for custom sorting as well. The TreeMap / TreeSet constructors, Collections.sort and Arrays.sort sure do.