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

    toPDF

    Online service for PDF conversion (to PDF)

    A simple online service for PDF conversion. This project is a simple library and also a web application. It offers a REST service and a simple upload service for synchronous conversion. This library/application doesn't contain conversion libraries because it's a wrapper for existing tools. toPDF currently supports the open source tool PDF Creator (http://www.pdfforge.org) and the commercial solution, easy PDF, from BCL (http://www.pdfonline.com/easypdf/sdk/).
    Downloads: 1 This Week
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  • 2

    .Net Native Interface Library

    The best library to work with .Net Assemblies in any programming lang.

    The .Net Native Interface Library (DotNetNativeInterface) is a native programming interface which provides a way for programming languages such as C, C++, Fortran, Assembly, Pascal, Java, VB etc to interact with applications and libraries written in any of the .Net languages (such as C#, VB.Net etc). Programmers can use DotNetNativeInterface native methods to access .Net 3rd party libraries or .Net Framework Libraries without the need for registry entries, COM registrations or changes to the .Net libraries. The following examples illustrate when you need to use DotNetNativeInterface native methods: 1. You want to access and use .Net Framework Class Library in your application. 2. You want to access and use 3rd party .Net Libraries in your application. Competitive Advantages: 1. Access to .Net Framework Class Library. 2. No COM registration of .Net Libraries is required when deployed. 3. Allows any programming language to consume .Net libraries as if they were native code.
    Downloads: 0 This Week
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  • 3
    30 Seconds of Java

    30 Seconds of Java

    Collection of reusable tested Java 21 compatible code snippets

    30 Seconds of Java is a curated collection of short, focused Java code snippets intended to teach small concepts quickly, similar to the popular “30 seconds of code” format in other languages. Each snippet is designed to be read and understood in under a minute, showing a single idea such as working with streams, handling optionals, manipulating collections, or doing common utility tasks. The repo targets both beginners who want bite-sized learning and experienced developers who just need a ready-made idiom without digging through docs. Because the snippets are standalone, you can copy them directly into your project or adapt them with minimal changes. The collection is organized and documented so you can browse by category and skill level. Overall, it’s a convenient library for learning modern, idiomatic Java fast and applying it right away.
    Downloads: 0 This Week
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  • 4
    3DzzD is an API to publish 3D on the Web using Java 1.1 technologie.
    Downloads: 0 This Week
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  • 5
    7-Zip-NBinding
    .NET wrapper for 7Zip, based on 7-Zip-JBinding, produced with IKVM. Extracts (password protected, multi-part) 7z Zip Rar Tar Split Lzma Iso HFS GZip Cpio BZip2 Z Arj Chm Lhz Cab Nsis Deb Rpm Udf archives. Archive creation/more formats coming soon.
    Downloads: 0 This Week
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  • 6

    A-JLib

    A simple java lib with Swing widgets and other stuff.

    A simple java library with Swing widgets and other stuff. This library tries to simplify the development of Swing applications ... which is sometime a nightmare ! It contains the classes I developed during the Yapbam project in order to deal with the problems I encountered. This work is still under progress and some things may be changed in the future (especially some class names). The classes available here are quite stable and used in the Yapbam project. AJlib is also available through Maven GroupId: com.fathzer ArtifactId: ajlib javadoc is at https://javadoc.io/doc/com.fathzer/ajlib
    Downloads: 0 This Week
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  • 7
    ADDC Server Commons Java Libraries

    ADDC Server Commons Java Libraries

    Java libraries for buiding IIOP and Web Services

    ADDC Server Commons supplies a set of java libraries published to maven central for writing Java servers offering both IIOP/SSLIOP and HTTP/HTTPS access using Spring Framewrok and JacORB. It also supplies a client for Monitoring CORBA Services, Balanced Groups and a full JNDI implementation for both CosNaming and Java.
    Downloads: 0 This Week
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  • 8
    AES Everywhere

    AES Everywhere

    Cross Language AES 256 Encryption Library

    AES Everywhere is Cross Language Encryption Library that provides the ability to encrypt and decrypt data using a single algorithm in different programming languages and on different platforms. This is an implementation of the AES algorithm, specifically CBC mode, with 256-bit key length and PKCS7 padding. It implements OpenSSL-compatible cryptography with randomly generated salt.
    Downloads: 0 This Week
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  • 9
    Utilities and Helper for JavaEE Developments
    Downloads: 0 This Week
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  • 10
    AL-IV

    AL-IV

    ALFOUR Programming language. Simple, safe, power, multi-platform.

    A programming language AL-IV (ALFOUR) is a high-level imperative object oriented programming language with minimal introduction level, easy porting to any platform claiming a very high level of safety and stability, with a controllable level of code protection, high efficiency of an executable code, full independence from a target platform, minimal enter level.
    Downloads: 0 This Week
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  • 11
    ANDS PID Client
    ANDS PID Client is a generic Java client library for accessing the ANDS Persistent Identifier service and the Digital Object Identifier Service. Written by CSIRO Australia and funded by the ANDS Australian Research Data Commons Project .
    Downloads: 0 This Week
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  • 12
    ANNJ, Another Neural Network for Java is a neural network framework for the Java programming language. It is still in an early development stage, currently supporting only feed-forward type networks, but will soon be able to handle many other types.
    Downloads: 0 This Week
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  • 13
    ANSEL character set encoder/decoder for Java
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  • 14

    ARSystem plugins for Pentaho Kettle

    AR-System step and db plugins for Pentaho Data Integration Kettle V5

    Allows you to write per API to AR-System Server (BMC Remedy Action Request System). Includes two step output, one step input and one database plugin. The step plugins need the database plugin.
    Downloads: 0 This Week
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  • 15
    Asti util projects. - event - exception handlers
    Downloads: 0 This Week
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  • 16
    AVLoadingIndicatorView

    AVLoadingIndicatorView

    A collection of nice loading animations for Android

    AVLoadingIndicatorView is a collection of nice loading animations for Android. You can add dependencies in build.gradle. You have the option of adding the AVLoadingIndicatorView to your layout. Indicators are load from class names, proguard may change it (rename). Among the features provided and available, you can add dependencies, add xml layout, show and hide, etc. AVLoadingIndicatorView is very simple to use. You can also find iOS version of AVLoadingIndicatorView under the name "NVActivityIndicatorView". You can change all properties in Attributes inspector tab of Utilities panel. All properties are public so you can change them after initializing.
    Downloads: 0 This Week
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  • 17
    AWS Secrets Manager JDBC Library

    AWS Secrets Manager JDBC Library

    The AWS Secrets Manager JDBC Library for Java developers

    The AWS Secrets Manager JDBC Library enables Java developers to easily connect to SQL databases using secrets stored in AWS Secrets Manager. We provide database drivers that intercept calls to real database drivers and swap out secret IDs for actual login credentials. This prevents hard-coding database credentials into your application code. This can be integrated into your app through a few configuration file changes. Change the jdbc url to one that our driver will intercept (starting with jdbc-secretsmanager), Change the c3p0 user to be the secret ID of the secret in secrets manager that has the username and password, and change the driverClass to be our driver wrapper. The secret being used should be in the JSON format we use for our rotation lambdas for RDS databases.
    Downloads: 0 This Week
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  • 18
    Absolute Baseline Complete Default Suite

    Absolute Baseline Complete Default Suite

    A NetBeans Module Suite project cluster for common branding functions.

    gts-abcdef is a NetBeans Module Suite project harness, useful for templating some NetBeans Platform module suite applications with a set of common branding and initialization infrastructure. Add this to your new module suite application project.
    Downloads: 0 This Week
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  • 19
    "Active Collections" is an API written by extending existing collection framework provided in JDK. This API will facilitate the consumer of a collection to handle events whenever the collection is modified.
    Downloads: 0 This Week
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  • 20
    Advanced RecyclerView

    Advanced RecyclerView

    RecyclerView extension library which provides advanced features

    This RecyclerView extension library provides Google's Inbox app like swiping, Play Music app like drag-and-drop sorting and expandable item features. Works on API level 14 or later. Reduces library conflicts, easy to integrate with existing code. Looks difficult at a glance, but gives great flexibility like the original RecyclerView. Swipe dismiss and swipe pinning operation. (like Google's Inbox app). Smooth item reordering with linear list (LinearLayoutManager). It behaves like the playlist of Google's Play Music app. A list with collapsible groups and its children. This feature is a port of the ExpandableListView of Android framework. All swipe, drag and drop, expand and wrapper adapter features work together! The ItemAnimator behaves exactly the same as the default SimpleItemAnimator, but its code is refactored. Easier to customize!
    Downloads: 0 This Week
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  • 21
    Agrona

    Agrona

    High Performance data structures and utility methods for Java

    Agrona provides a library of data structures and utility methods that are a common need when building high-performance applications in Java. Many of these utilities are used in the Aeron efficient reliable UDP unicast, multicast, and IPC message transport and provides high-performance buffer implementations to support the Simple Binary Encoding Message Codec.
    Downloads: 0 This Week
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  • 22
    Ajanta is a Java API to solve linear programming problems. Linear programming is a method for determining a way to achieve the best outcome (such as maximum profit or lowest cost) in a given list of constraints.
    Downloads: 0 This Week
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  • 23
    Aleph

    Aleph

    Asynchronous streaming communication for Clojure

    Aleph is an asynchronous I/O framework for Clojure built atop Netty, offering efficient, non-blocking network programming with support for HTTP, raw TCP/UDP, and streaming through Manifold streams. Aleph follows the Ring spec fully and can be a drop-in replacement for any existing Ring-compliant server. However, it also allows for the handler function to return a Manifold deferred to represent an eventual response. This feature may not play nicely with synchronous Ring middleware, which modifies the response, but this can be easily fixed by reimplementing the middleware using Manifold's let-flow operator. The aleph.http/wrap-ring-async-handler helper can be used to convert async 3-arity Ring handler to an Aleph-compliant one.
    Downloads: 0 This Week
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  • 24

    AlgART Java Libraries

    Open source library for processing arrays and matrices

    AlgART Java libraries for processing arrays and matrices are open-source product, distributed under MIT license. So, anyone can use them for free without any restrictions. Main features: 63-bit addressing of array elements (64-bit long int indexes), memory model concept (allowing storing data in different schemes from RAM to mapped disk files), wide usage of lazy evaluations, built-in multithreading optimization for multi-core processors, wide set of image processing algorithms over matrices, etc. - please see at the site. Almost all classes and methods are thoroughly documented via JavaDoc (you may read full JavaDoc at the site).
    Downloads: 0 This Week
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  • 25
    The goal: to provide implementations of as many algorithms (sorting, searching, ...) and data structures (lists, trees, ...) as possible, accompanied by discussion of big O run time and memory limits and references to sources of further study.
    Downloads: 0 This Week
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