JAVA

The powere of HashMap in Java

businessman drawing an organization chart on a white board

Most developers use maps to store and get data especially HashMaps, but most of theme dont know how to use it or understand how  HashMaps works.  in this post , i’ll explain how the java.util.HashMap works , we will see different examples of HashMap, like adding and removing entries, iterating over Java HashMap, checking size map, finding if a key or value exists on Map and various other examples, which we used frequently.

The HashMap class uses a hashtable to implement the Map interface. This allows the execution time of basic operations, such as get( ) and put( ), to remain constant even for large sets… Continue reading >>