HashSet in Java

What is HashSet HashSet extends AbstractSet and is an implementation of Set interface. HashSet also implements Serializable and Cloneable interfaces. HashSet is backed by hash table(actually HashMap instance), i.e., the HashSet uses hash table(HashMap) to store collection elements. Like HashMap, it allows null only one element. HashSet in Java was Continue Reading…

JUnit Code Coverage

JaCoCo is quite a new maven plug-in that provides the JaCoCo runtime agent to your tests and allows basic report creation. Currently it supports instruction, branch, line, method and class coverage which is pretty enough you can expect from this kind of tool. Additionally, it can measure and report cyclomatic Continue Reading…

HashMap in Java

What is HashMap A HashMap is a simple yet powerful way to store and get data. HashMap is based on HashTable implementation, that implements the Map interface and stores items as key/value pairs. HashMap permits only unique keys. It also permits only one null key (whereas HashTable does not allow Continue Reading…