This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Besides, all enum classes implicitly extend java.lang.Enum which has final implementations of both. equals uses == and hashCode uses Object.hashCode. Try overriding them in any enum and you'll get a compiler error.