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.

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  • 1
    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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  • 2
    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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  • 3
    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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  • 4
    Gravity Simulator

    Gravity Simulator

    Multithreaded N-Point Gravity Simulation for PC and Android

    Create a sun, spin some asteroids around it, and watch them collide and form planets. An N-Point Gravity Simulator is a realistic simulation in which all points attract each other: even the smallest asteroid has its own gravitational field that can affect even a large sun far away from it. Can be reused as a library for making games. If used as library, license is GNU LGPLv3, otherwise it's GNU GPLv3.
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  • 5
    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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  • 6
    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.
    Downloads: 0 This Week
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  • 7
    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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  • 8

    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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  • 9
    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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  • 10
    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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  • 11

    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.
    Downloads: 0 This Week
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  • 12
    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.
    Downloads: 0 This Week
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  • 13
    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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  • 14
    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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  • 15
    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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  • 16
    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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  • 17
    HexLib - Java component for Hex-Editor
    A Java component which displays bytes in Hex- and ASCII-format. The component is designed as a standalone lib. A complete interface which provides the function of an HexEditor based on this lib exisits under the Fork of this project.
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  • 18
    HexLib GUI - Java Hex-Editor -Hex-Viewer
    Hex-Lib GUI takes the library HexLib into action, i.e. it is a working, fully functional Hex-Editor on base of HexLib. This project demonstrate the usage of the library for Java developers interested in the library in a practical approach.
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  • 19
    A data supporter library for developing hibernate ready applications with an easy to write dao code preventing session problems
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  • 20
    Hiberlog is a hibernate appender for log4j.
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  • 21
    Library of annotations and boiler plate code to connection hibernate annotated objects that represent data tables with SWT Widgets; with the goal of rapid CRUD operation capabilities through an SWT GUI. The project goals maybe expanded in the future.
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  • 22

    Hibersap

    A Java library to communicate with SAP

    Hibersap helps developers of Java applications to call business logic in SAP backends. It defines a set of Java annotations to map SAP function modules to Java classes as well as a small, clean API to execute these function modules and handle transaction and security aspects. Hibersap's programming model is quite similar to those of modern O/R mappers, significantly speeding up the development of SAP interfaces and making it much more fun to write the integration code. Under the hood, Hibersap either uses the SAP Java Connector (JCo) or a JCA compatible resource adapter to communicate with the SAP backend. While retaining the benefits of JCo and JCA like transactions, security, connection pooling, etc., developers can focus on writing business logic because the need for boilerplate code is largely reduced.
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  • 23
    Hide & Reveal
    Composed of a Java steganographic library and GUI to use steganography. Primarily intended for research communities on security and steganography to implement new dissimulation and steganalysis algorithms. More information at www.hidereveal.org
    Downloads: 0 This Week
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  • 24
    Hoodland Toolbox

    Hoodland Toolbox

    An assorted miscellany of tools and toys.

    Hoodland Toolbox (formerly known as the Rockabilly Common Libraries) An assorted miscellany of tools and toys used by all other Hoodland Open Source Projects (formerly Rockabilly Software). This project has been rewritten in Kotlin for the JVM. Its new home is here: https://github.com/william-hood/toolbox-kotlin Available in Maven Central Repository... Kotlin: https://central.sonatype.com/artifact/io.github.william-hood/toolbox-kotlin Java: https://central.sonatype.com/artifact/io.github.william-hood/toolbox-java
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  • 25
    Utilities for the project horizon. Contains the generator of sources from database metadata.
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