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.
(Copy of an answer I posted in a different forum) The simple answer: ArrayList is faster Why? Vector has been around longer and developed into a sort of be-all do-all class with synchronization and support for many different API. ArrayList is a straitforward implementation of a List with no whistles or bells.