Nov 22, 2025 · HashSet in Java implements the Set interface of the Collections Framework. It is used to store the unique elements, and it doesn't maintain any specific order of elements.

Initializes a new instance of the HashSet<T> class that uses the specified equality comparer for the set type, contains elements copied from the specified collection, and has sufficient capacity to …

Iterating over this set requires time proportional to the sum of the HashSet instance's size (the number of elements) plus the "capacity" of the backing HashMap instance (the number of buckets).

Java HashSet A HashSet is a collection of elements where every element is unique. It is part of the java.util package and implements the Set interface.

Jul 3, 2025 · In this article, we outlined the utility of a HashSet, its purpose as well as its underlying working. We saw how efficient it is in terms of usability given its constant time performance and …

Feb 3, 2026 · HashSet in Java is a collection class used to store unique elements, where duplicates are not allowed and the order of elements is not preserved. It is part of the Java Collections Framework …

May 21, 2025 · In this comprehensive guide, I‘ll walk you through everything you need to know about HashSet—from basic concepts to advanced techniques—so you can write more efficient, bug-free …

In this tutorial, we will learn about the Java HashSet class. We will learn about different hash set methods and operations with the help of examples.

This tutorial will cover all methods of HashSet with examples and outputs, highlighting key points, use cases, best practices, performance considerations, and a real-time example with CRUD operations.

Nov 12, 2025 · Understanding `HashSet` is crucial for Java developers as it has various applications, from eliminating duplicates in a list to implementing data caching strategies. This blog post will …