May 14, 2010 · What is the use of ConcurrentHashMap in Java? What are its benefits? How does it work? Sample code would be useful too.

Aug 9, 2011 · Based on this, I am confused that why we don't have a ConcurrentHashSet which should be based on the ConcurrentHashMap? Is there anything else that I am missing?

The ConcurrentHashMap is very similar to the java.util.HashTable class, except that ConcurrentHashMap offers better concurrency than HashTable or synchronizedMap does. …

Aug 18, 2009 · 7 ConcurrentHashMap uses finer-grained locking mechanism known as lock stripping to allow greater degree of shared access. Due to this it provides better concurrency …

What is the difference between a ConcurrentHashMap and a Hashtable in Java? Which is more efficient for threaded applications?

How is the performance of ConcurrentHashMap compared to HashMap, especially .get () operation (I'm especially interested for the case of only few items, in the range between maybe …

Use ConcurrentHashMap only when the class where it's being used is thread safe; otherwise the use of a thread safe data structure in a non thread safe class adds to the confusion of the next …

However, although ConcurrentHashMap is a thread-safe drop-in replacement for HashMap, it is important to realize that if you are doing multiple operations you may have to change your …

Feb 4, 2009 · The ConcurrentHashMap uses very sophisticated techniques to reduce the need for synchronization and allow parallel read access by multiple threads without synchronization …

There is a new computeIfAbsent API introduced in Java 8. The javadocs for ConcurrentHashMap's impelementation of it state: If the specified key is not already …