HashMap is an efficient and important data structure that stores a mapping between data with the specialty of constant time searching, retrieval, insertion and deletion. It is an important member of the Java Collection data structure library and is used by us in many programming scenarios.
Read this article to understand HashMap in Java in depth
Have a doubt or thought? Join the discussion now
This is a companion discussion topic for the original entry at http://iq.opengenus.org/hashmap-java/