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.
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