Category: Core Java

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

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

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

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

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

In this article, we will explore the features, methods, and performance characteristics of HashMap in Java, allowing you to leverage[…]

LinkedList implements both List and Deque. It uses doubly-linked list data structure internally to store the elements. Like an ArrayList,[…]

In this article, we will examine various aspects of ArrayList in Java. So, let’s get started. What is ArrayList in[…]

In this article, we will look into the high level view of Java Collections Framework. The Java Collections Framework is[…]