public const int LANCELOTS_FAVOURITE_COLOUR; (constant for the colour blue. This is an oldschool real programmer favourite.)
interface ICanTerminate?; (contains a shutdown() method for classes that can/should tidy up resources when they are done with)
boolean isHighlander(); (indicates that contray to data structure shape, is is valid for there to be only 1 of this particular object).
interface IHighlander; (implemented by classes that are expected to never die for the lifetime of the app - e.g. JMS listeners. Often extends ICanTerminate?, can have an isHighlander() method for singletons)
void JohnSheridan?(); (when called, terminates all threads in all processes in this application immediately (kills *))
Feel free to add.