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

9 באוג׳ 2011 · But ConcurrentHashMap is implemented using non-blocking algorithms and "low-level" synchronisations without any locks of the whole collection. So wrapers from …

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

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 …

The get() method is thread-safe, and the other users gave you useful answers regarding this particular issue. However, although ConcurrentHashMap is a thread-safe drop-in replacement …

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 associated …

18 באוג׳ 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 …

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

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