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java-hashset

80 posts

Java Program to Implement HashSet API

Last Updated: 11 February 2021

The HashSet class implements the Set interface, backed by a hash table which is actually a HashMap instance. No guarantee is made as to the iteration order of the set whic...read more

Java-Collections

Get Enumeration over Java HashSet

Last Updated: 03 March 2021

The HashSet class implements the Set interface, backed by a hash table which is a HashMap instance. There is no assurance as to the iteration order of the set, which impli...read more

Java-Enumeration

Maven Project - HashMap and HashSet Collections with JUnit Testing

Last Updated: 28 April 2025

In many software, we will be working with HashMap and HashSet and always there is confusion exists that when to use HashMap and when to use HashSet. As a sample project, a...read more

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Technical Scripter

Software Testing

Technical Scripter 2022

How to Implement a Bidirectional Map Using Two HashSets in Java?

Last Updated: 07 February 2024

Bidirectional maps are also known as two-way maps or dual maps. These provide a convenient way to establish a relationship between keys and values in both directions. In J...read more

How to Iterate Over a HashSet Without an Iterator in Java?

Last Updated: 01 February 2024

In Java, we can iterate over a HashSet without using an Iterator. For this, we need two methods. We can directly loop through the elements of the HashSet.In this article, ...read more

Deep Copy of a HashSet in Java

Last Updated: 02 February 2024

HashSet is used to store a unique set of values in Java. It is a class that stores values and provides efficient access. As we know Java uses call-by-reference. So, if we ...read more

How to Create a HashSet With a Predefined Capacity in Java?

Last Updated: 01 February 2024

In Java, we can create HashSet with a predefined capacity by creating a constructor and passing the capacity as a parameter to it. We have to initialize the capacity using...read more

How to Convert List of Lists to HashSet in Java Using Lambda Expression?

Last Updated: 12 February 2024

A lambda expression is a short code block that accepts parameters and outputs a result. Similar to methods, lambda expressions can be used directly within the body of a me...read more

Java-Collections-Class

How to Serialize and Deserialize a HashSet in Java?

Last Updated: 28 April 2025

Serialization is the technique of converting an object's state into a byte stream. The main purpose of serialization is to save the state of an object so that it can be re...read more

How to Create Subsets of a HashSet based on Specific Criteria in Java?

Last Updated: 20 February 2024

In Java, HashSet provides a dynamic collection of unique elements. Sometimes, we may need to create subsets of a HashSet based on specific criteria. In this article, we wi...read more

How to Create a HashSet with a Custom Initial Load Factor in Java?

Last Updated: 14 February 2024

Java HashSet is a simple data structure provided by the Java Collection Framework that provides efficient storage and enables the storage of unique objects. One of the par...read more

How to Convert a HashSet to JSON in Java?

Last Updated: 28 April 2025

In Java, a HashSet is an implementation of the Set interface that uses a hash table to store elements. It allows fast lookups and does not allow duplicate elements. Elemen...read more

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How to Convert List of Lists to HashSet in Java?

Last Updated: 26 February 2024

In Java, Collections like lists, and sets play a crucial role in converting and manipulating the data efficiently. The Conversion of a List of Lists into a HashSet is main...read more

Java Collection Exercise

Last Updated: 12 March 2024

The Java Collection framework is a fundamental part of the Java programming language, It covers a major part of Java and acts as a prerequisite for many Advanced Java Topi...read more

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Java-Collections

java-priority-queue

Java-Collection-Programs

How to Optimize Memory Usage and Performance for large HashSet Datasets in Java?

Last Updated: 05 April 2024

HashSet is mainly used for the data structures in Java offers fast access and prevents duplicate elements. So, the size of the dataset will be improved and it can raise me...read more

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Java-Collections