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.

  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

    BigQuery automates data prep, analysis, and predictions with built-in AI assistance.

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  • 1
    The aim of GUINNEA (Graphical User Interfaced Neural Network Architecture) is to develop a comfortable and high-featured neural net simulator which is highly configurable and flexible. It will support many neural nets and visualization features for those
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  • 2

    GenericStruts

    Simplify Struts2 + Hibernate application development

    This library implement common code used in Struts2 + Hibernate MVC applications.
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  • 3
    Genetic Algorithms Library (in Java)

    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
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  • 4

    GeoWeb 3D Globe

    Geospatial Web 3D Globe Project(To consider S.Korea market)

    The goal of "GeoWeb 3D Globe" is developing 3D visualization and utilization module for geospatial data. We are conveniently wide range of developers hope to take advantage of geospatial information. Using three-dimensional spatial information service developed for web-based 3D "GeoWeb 3D Globe" The main contents of the project are as follows: 1. Based on proven open source SW(WWJava) 2. Specializing in 3D visualization of geospatial data 3. Web based service
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  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

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  • 5
    An umbrella project for static data repositories, such as ISO country codes, currency codes, and more to come. For each subject, there will be three stages: data gathering, java repository implementation, generation of files for other technologies.
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  • 6
    Glue Stick dependency injection framework is used for assembling and configuring Java applications from external bean definition and configuration files. There are several supported bean definition file formats, such as Groovy, JSON and Spring XML.
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  • 7

    GoodbyDao

    A Fully functional and Simple API Generic DAO

    A Fully functional and Simple API Generic DAO. source @: https://github.com/mortezaadi/GoodbyDao
    Downloads: 0 This Week
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  • 8
    Java library implementing simple management of application deployed in Google App Engine. Right now is supported only downloading and parsing of quota details. Which in fact the primary reason of existence of this library.
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  • 9
    Google Cloud Platform Java Samples

    Google Cloud Platform Java Samples

    Java and Kotlin Code samples used on cloud.google.com

    Java and Kotlin Code samples used on cloud.google. This repository holds sample code written in Java that demonstrates the Google Cloud Platform. Every file containing source code must include copyright and license information. This includes any JS/CSS files that you might be serving out to browsers.
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  • Ship Agents Faster Icon
    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
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  • 10
    Google Maps SDK for Android Samples

    Google Maps SDK for Android Samples

    Samples demonstrating how to use Maps SDK for Android

    Create dynamic, interactive and personalized experiences with maps, locations and geospatial experiences for your Android apps. Create an account, generate an API key, and start creating. Learn how to load the Maps SDK for Android and add a map with a bookmark to your web application. You can customize almost all aspects of the map, such as routes, landforms and places of interest, among others. Find the current location of an Android device and display details of the place or other place of interest in that location. Add bookmarks to a map, interact with click events, customize color and image, and more. Displays an information window with additional data and context when users press a bookmark. Customize user interaction by configuring integrated UI components and gestures. Listen to events on the map, including clicks on maps, clicks on markers, camera changes, and overlay events, among others.
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  • 11
    Gradle Libraries Plugin

    Gradle Libraries Plugin

    This plugin allows to specify versions of external libraries

    This plugin allows to specify versions of external libraries in a centralized place and use them across the project. It's specifically useful for Gradle multi-projects. This plugin also uses com.github.ben-manes.versions plugin to automatically update libraries once new releases are available. Run ./gradlew syncLibraries to create $rootDir/dependencies.json file with all currently known dependencies. Once dependencies.json file is in place by generating via syncLibraries task or just by manually creating it, all declared in dependencies.json libraries can be used in project files. It's not a secret that it's really hard to keep libraries up to date especially when there are dozens and sometimes hundreds of them. For that purpose, this plugin has update libraries task that will automatically check for available new versions of libraries.
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  • 12
    A shell for the layout manager GroupLayout. It allows to control components' placement using simple 2-dimensional textual schemes. Such approach to GUI creation removes the problem of representing a 2-dimensional GUI by 1-dimensional code.
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  • 13
    Guillotine animation

    Guillotine animation

    Provides a simple way to implement guillotine-styled animation

    Neat library, that provides a simple way to implement guillotine-styled animation. Builder allows you to customize start delay, duration, interpolation and you can set listener if you want to do staff at the moment when menu has been opened or closed.
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  • 14
    Java library to easily use Gure Gipuzkoa's public API. (http://guregipuzkoa.net/api/) Java application to easily upload sets of photos to Gure Gipuzkoa.
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  • 15

    GxApp

    Open Utilities and/or Examples for GeneXus

    Open utilities and/or examples for GeneXus, this includes: Example procedures Usercontrols Utilities Others...
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  • 16
    This project contains many useful utility classes developed by the fine folks at H9Labs, the research and development arm of Hyper9.
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  • 17
    HE-Collection

    HE-Collection

    HE-Collections - independent from hashCode() and equals(Object)

    The Java-Standard-Collections demand correct implementations of the hashCode()- and the equals(Object)- method from any object that is to be stored in a collection. Otherwise, the behavoir of the Java-Standard-Collection is not determined. HE-Collections where implemente in order to store objects in a collection, that brake the contract between equals(Object) and hashCode(), HE-Collections behave predictably even if they contain objects that don't obey the contract. The name "HE" stands for Hashcode and Equals.
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  • 18

    HEIMDALL

    High-End Interface for Monitoring & spatial Data Analysis using L2Norm

    HEIMDALL, short for High-End Interface for Monitoring and spatial Data Analysis using L2-Norm, is a set of public libraries written in JAVA which contains routines and algorithms for geodetic hardware connection. To observe objects (in general spatial points) continuous, HEIMDALL’s programmable logic arrays can be used to design monitoring systems. For data analysis an interface to the least-squares program JAG3D can be provided. The serial communication with e.g. inclination sensors, meteorological stations or total stations is handled by the library RXTX. If only a proprietary communication via dynamic-link library (dll are not shared by the project) is supported by the devices, JNA is resorted. Notice, HEIMDALL is not a stand-alone monitoring application. It is only a set of libraries.
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  • 19
    HTTP Manager for Android

    HTTP Manager for Android

    HTTP Library for GET & POST requests in Android Applications

    HTTP Manager for Android allows you manage HTTP requests easy and fast. You have to create just one class with urls and implements one interface.
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  • 20
    Hadoop-BAM is a Java library for the manipulation of files in common bioinformatics formats using the Hadoop MapReduce framework with the Picard SAM JDK, and command line tools similar to SAMtools. The file formats currently supported are BAM, SAM, FASTQ, FASTA, QSEQ, BCF, and VCF. For a longer high-level description of Hadoop-BAM, refer to the article "Hadoop-BAM: directly manipulating next generation sequencing data in the cloud" in Bioinformatics Volume 28 Issue 6 pp. 876-877, available online at: http://dx.doi.org/10.1093/bioinformatics/bts054 Note that the library part of Hadoop-BAM is mainly for developers with experience in using Hadoop. The command line tools of Hadoop-BAM should be understandable to all users, but they are limited in scope. See the SeqPig project for a higher-level interface to the file formats supported by Hadoop-BAM: http://seqpig.sourceforge.net See Seal for Hadoop-based read alignment tools, Seal: http://biodoop-seal.sourceforge.net
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  • 21
    Happy Java Library

    Happy Java Library

    Multilock, Collections, Controllers, Delegates, Generators, Streams

    Helps to develop and test event-based multi-threaded Java application. Because of method called as API-Evolution the Happy Java Library is fully downward compatible. The library contains following functionality: MultiLock, Parallel loops, Collections, Controllers, Generators, Delegates, Streams.
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  • 22
    Making Hebrew properly searchable by IR software. Right now, most work is being done in our mailing list (planning), and on our github repository (concept code, see below).
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  • 23
    Hedera provides common interfaces for popular group communications packages like JGroups, Appia, and Spread. Hedera allows applications to switch easily between group communications without code changes and with minimal reconfiguration.
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  • 24
    Helidon

    Helidon

    Java libraries for writing microservices

    Helidon is a cloud-native, open‑source set of Java libraries for writing microservices that run on a fast web core powered by Netty. Helidon Níma is the first Java microservices framework based on virtual threads. Helidon is designed to be simple to use, with tooling and examples to get you going quickly. Since Helidon is simply a collection of Java libraries running on a fast Netty core, there is no extra overhead or bloat. Helidon supports MicroProfile and provides familiar APIs like JAX-RS, CDI and JSON-P/B. Our implementation runs on our fast Helidon Reactive WebServer. Helidon Reactive WebServer provides a modern functional programming model and runs on top of Netty. Lightweight, flexible and reactive, the Helidon WebServer provides a simple-to-use and fast foundation for your microservices.
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  • 25
    HelloCharts for Android

    HelloCharts for Android

    Charts/graphs library for Android compatible with API 8+

    Charting library for Android compatible with API 8+(Android 2.2). Works best when hardware acceleration is available, so API 14+(Android 4.0) is recommended. Apache License 2.0. Line chart (cubic lines, filled lines, scattered points), column chart (grouped, stacked, negative values), pie chart, bubble chart, combo chart (columns/lines), preview charts (for column chart and line chart), zoom (pinch to zoom, double tap zoom), scroll and fling. Custom and auto-generated axes (top, bottom, left, right, inside), and animations. Code of a demo application is in hellocharts-samples directory, requires appcompat v21. The demo app is also ready for download on Google Play. Every chart view can be defined in layout xml file or created in code and added to layout later. After the chart data has been set you can still modify its attributes but right after that you should call set*ChartData() method again to let chart recalculate and redraw data.
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