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).

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.

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.

Dec 11, 2017 · 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 …

Oct 29, 2025 · 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 …

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.

Jul 13, 2025 · A HashSet is a part of Java's collection framework that stores only unique elements. If you try to add a value that’s already in the set, it simply won’t be added again.

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.

May 21, 2025 · HashSet is a class in Java‘s Collections Framework that implements the Set interface. At its core, HashSet stores elements in a hash table, which is essentially an array where elements are …

The Java HashSet class implements the Set interface, backed by a hash table.Following are the important points about HashSet − This class makes no guarantees as to the iteration order of the …