This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
First of all welcome to Ranch!!!
If you have to inherit a class already then I recommend "implements Runnable" because as you know a class cannot inherit multiple classes.
If you don't have to inherit any class then you can use either