ConcurrentHashMap vs Synchronized HashMap

Question

What is the difference between using the wrapper class, SynchronizedMap, on a HashMap and ConcurrentHashMap?

Is it just bein

Answer 1

The short answer:

Both maps are thread-safe implementations of the Map interface. ConcurrentHashMap is implemented for higher throughput in cases where high concurrency is expected.

Brian Goetz's article on the idea behind ConcurrentHashMap is a very good read. Highly recommended.