Why there is no ConcurrentLinkedHashMap class in jdk?

Question

This question follows directly from my previous question here in SO . I think the answer to my second question is no . So I would like understand why there is no ConcurrentLinke

Answer 1

Looks like there is one from Google https://code.google.com/p/concurrentlinkedhashmap/

Check also this post: What does it mean that ConcurrentLinkedHashMap has been integrated into Guava?