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.

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.

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 · Working with a HashSet in Java involves a few important operations like adding, removing, and accessing elements. This section will discuss each operation with practical Java …

Aug 14, 2025 · HashSet is one of the most efficient and widely used implementations of the Set interface in Java. Backed by a HashMap, it ensures that no duplicate elements are stored while offering …

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.

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.

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 …

Apr 1, 2025 · HashSet is a collection containing objects that are in a random order. This tutorial will explain all about HashSet in Java with examples.