Best Open Source Java Libraries

Java Libraries

Libraries Java 4 - Beta Algorithms Clear Filters

Browse free open source Java Libraries and projects below. Use the toggles on the left to filter open source Java Libraries by OS, license, language, programming language, and project status.

Our Free Plans just got better! | Auth0
With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.

Try free now
Run applications fast and securely in a fully managed environment
Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.

Try for free
1

JUtilClasses

Java programmer's aid in useful methods and classes

Util-Classes is a collection of Java classes for programming support in service for building applications. It covers a wide range of topics from simple small routines over Collection classes to larger utilities addressing IO-management, GUI topics and data safety.

Downloads: 1 This Week

Last Update: 2025-02-23
See Project
2

Genetic Algorithms Library (in Java)

An API for Java developers who need Genetic Algorithms

This API is intended to help developers use genetic algorithms in their own java applications. GeneticLibrary.zip contains the netbeans project of the API itself. GeneticTrial.zip contains another netbeans project which is an example explaining how to use the API. docs.zip is the documentation of the API. Please take a look there, it is really helpful. I have only two request from who will use this API; USE, UPDATE AND MODIFY IT FREELY JUST NOTE THE ORIGINAL AUTHOR

Downloads: 0 This Week

Last Update: 2013-05-30
See Project
3

JavaGimmicks

Utility classes, APIs and tools for Java

A set of helper and utility classes, APIs and tools for the Java Programming Language. For more details - pleas visit the project homepage.

Downloads: 0 This Week

Last Update: 2017-09-15
See Project
4

Programming Accessory Kit

PAK is a collection of library code to handle the overhead of coding

PAK is a collection of library code to handle the overhead of coding things like read-write locks, reflective multithreaded programming and simple file io. This is a java library collection, please see my API below...

Downloads: 0 This Week

Last Update: 2013-10-05
See Project
Free and Open Source HR Software
OrangeHRM provides a world-class HRIS experience and offers everything you and your team need to be that HR hero you know that you are.

Give your HR team the tools they need to streamline administrative tasks, support employees, and make informed decisions with the OrangeHRM free and open source HR software.

Learn More
5

jfunctions

Java library for operations with Iterables and other data structures in functional way.

Downloads: 0 This Week

Last Update: 2014-08-25
See Project