Concurrent Map In Java

Whereas, concurrenthashmap is introduced as an alternative to the hashmap. It has got and set methods that work like reads and writes on volatile variables. That is, multiple threads can access the map at once without affecting the consistency of entries in a map.

It's immutable snapshot style iterator method uses a reference to the state of the array at the point that the iterator was created. A java.util.concurrent.concurrentmap interface is a subinterface of map interface, supports atomic operations on underlying map variable. For unordered access as defined in the java.util.map interface, the java.util.concurrent.concurrenthashmap implements java.util.concurrent.concurrentmap.

It extends the map interface.

These implementations use fine grained locking/synchronization for thread safety. Concurrentnavigablemap <k,v> all known implementing classes: What is a tree map java? Both have been greatly improved with the introduction of lambda expressions and functional programming in the latest java 8 release.