March 2017 - Javagyansite

equals and hashCode in Java

March 31, 2017 gyanauce2006 Collections Framework, Core Java, Core Java Basics, Java

equals method is used to check the equality of two objects based on it’s contents. equals versus == If two[…]

Multiple Inheritance in Java: Exploring Alternatives and Solutions

March 26, 2017 gyanauce2006 Java, OOPS

In this article, we’ll look at the complexities of multiple inheritance in Java, the infamous “diamond problem,” and the various[…]

LinkedHashMap in Java

March 21, 2017 gyanauce2006 Collections Framework, Core Java, Java

LinkedHashMap implements Map and extends HashMap.Please visit HashMap for understanding the internal working of HashMap before you read further so that it becomes[…]

ClassNotFoundException vs NoClassDefFoundError

March 19, 2017 gyanauce2006 Core Java, Exception Handling, Java

ClassNotFoundException NoClassDefFoundError Exception or Error? It is of type java.lang.Exception.It is a Checked Exception. It is of type java.lang.Error. When[…]

Exception Handling in Java: Comprehensive Guide

March 19, 2017 gyanauce2006 Core Java, Exception Handling, Java

Exception handling in Java is a mechanism that allows developers to handle runtime errors, unexpected events, and exceptional situations that[…]

TreeMap in Java

March 18, 2017 gyanauce2006 Collections Framework, Core Java, Java

Before we jump into TreeMap, let us first look into Tree Data Structure. The basic building block for the tree[…]

Comparable vs Comparator

March 17, 2017 gyanauce2006 Collections Framework, Core Java, Java

Comparable Comparator What is it? Here the Object compares itself with another Object of same type.For example: An Employee comparing[…]

CopyOnWriteArrayList vs SynchronizedList

March 13, 2017 gyanauce2006 Collections Framework, Core Java, Java

CopyOnWriteArrayList(Introduced in JDK 1.5) SynchronizedList Creation List list = new CopyOnWriteArrayList(); List list = new ArrayList(); List syncList = Collections.synchronizedList(list);[…]

fail-fast iterator Vs fail-safe iterator

March 12, 2017 gyanauce2006 Collections Framework, Core Java, Java

fail-fast iterator fail-safe iterator Is Modification of underlying Collection Allowed? NO. It throws ConcurrentModificationException if the underlying collection is structurally[…]

HashMap vs Hashtable vs SynchronizedHashMap vs ConcurrentHashMap

March 12, 2017 gyanauce2006 Collections Framework, Core Java, Java

In this Article, we will explore HashMap vs Hashtable vs SynchronizedHashMap vs ConcurrentHashMap. HashMap vs Hashtable vs SynchronizedHashMap vs ConcurrentHashMap:[…]