OpenHFT Java Thread Affinity library
See the affinity/src/test/java for working examples of how to use this library.
V2.0.1 - Added getThreadId for the process if of the thread.
Java Thread Affinity support group
For an article on how much difference affinity can make and how to use it http://vanillajava.blogspot.com/2013/07/micro-jitter-busy-waiting-and-binding.html