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.
It is a bit confusing. I believe you need to override the method in your Address class. You can leave it as protected and just return super.clone() if that's acceptable. Also, bring your salt shaker as I can't recollect ever using protected nor do I use Cloneable so it's entirely possible I'm spewing misinformation as it's not something I generally bother with on either count.