Thread safe Hash Map?

Question

I am writing an application which will return a HashMap to user. User will get reference to this MAP. On the backend, I will be running some threads which will update the Ma

Answer 1

Side Note:

You might want to look into the lock free hash table implementation by Cliff Click, it's part of the Highly Scalable Java library

(Here's a Google Talk by Cliff Click about this lock free hash.)