Hi, Jack, and welcome to the Ranch!
No, that's not a closure. There was talk of adding closures to
Java 7, but I don't think they made it in. Don't quote me on that last bit though.
What you're seeing is Java's closest approximation to a closure. It's an
anonymous inner class.(⇐That's a google link, but skip anything that takes you to roseindia. That site is known for being rife with errors.)