1186 Repositories
Java classes-and-objects Libraries
Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.
Welcome to the Eclipse OpenJ9 repository We're not sure which route you might have taken on your way here, but we're really pleased to see you! If you
[INACTIVE] Avian is a lightweight virtual machine and class library designed to provide a useful subset of Java's features, suitable for building self-contained applications.
Avian - A lightweight Java Virtual Machine (JVM) PLEASE NOTE: This project is not currently being developed, maintained, or supported. Feel free to us
A modern JSON library for Kotlin and Java.
Moshi Moshi is a modern JSON library for Android and Java. It makes it easy to parse JSON into Java objects: String json = ...; Moshi moshi = new Mos
Screaming fast JSON parsing and serialization library for Android.
#LoganSquare The fastest JSON parsing and serializing library available for Android. Based on Jackson's streaming API, LoganSquare is able to consiste
Set of support modules for Java 8 datatypes (Optionals, date/time) and features (parameter names)
Overview This is a multi-module umbrella project for Jackson modules needed to support Java 8 features, especially with Jackson 2.x that only requires
A Java serialization/deserialization library to convert Java Objects into JSON and back
Gson Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to a
A simple Java Scheduler library with a minimal footprint and a straightforward API
Wisp Scheduler Wisp is a library for managing the execution of recurring Java jobs. It works like the Java class ScheduledThreadPoolExecutor, but it c
An extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.
The ultimate library to perform background processing on the JVM. Dead simple API. Extensible. Reliable. Distributed and backed by persistent storage.
jOOR - Fluent Reflection in Java jOOR is a very simple fluent API that gives access to your Java Class structures in a more intuitive way. The JDK's reflection APIs are hard and verbose to use. Other languages have much simpler constructs to access type meta information at runtime. Let us make Java reflection better.
Overview jOOR stands for jOOR Object Oriented Reflection. It is a simple wrapper for the java.lang.reflect package. jOOR's name is inspired by jOOQ, a
An uber-fast parallelized Java classpath scanner and module scanner.
ClassGraph ClassGraph is an uber-fast parallelized classpath scanner and module scanner for Java, Scala, Kotlin and other JVM languages. ClassGraph wo
Published on Maven Central and jCenter Java Library that compares 2 images with the same sizes and shows the differences visually by drawing rectangles. Some parts of the image can be excluded from the comparison. Can be used for automation qa tests.
About Configurations Release Notes Usage Demo License Contributing Code of Conduct Other Projects About Published on Maven Central and jCenter Java Li
TwelveMonkeys ImageIO: Additional plug-ins and extensions for Java's ImageIO
About TwelveMonkeys ImageIO is a collection of plugins and extensions for Java's ImageIO. These plugins extend the number of image file formats suppor
Asynchronous Http and WebSocket Client library for Java
Async Http Client Follow @AsyncHttpClient on Twitter. The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and a
Java Collections till the last breadcrumb of memory and performance
Koloboke A family of projects around collections in Java (so far). The Koloboke Collections API A carefully designed extension of the Java Collections
Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
English | 中文 | Deutsch | Español | Ελληνικά | Français | 日本語 | Norsk (bokmål) | Português-Brasil | Русский | हिंदी Eclipse Collections is a comprehens
High Performance data structures and utility methods for Java
Agrona Agrona provides a library of data structures and utility methods that are a common need when building high-performance applications in Java. Ma
Vector map library and writer - running on Android and Desktop.
Mapsforge See the integration guide and changelog. And read through how to contribute guidelines. If you have any questions or problems, don't hesitat
Backport of functionality based on JSR-310 to Java SE 6 and 7. This is NOT an implementation of JSR-310.
ThreeTen backport project JSR-310 provides a new date and time library for Java SE 8. This project is the backport to Java SE 6 and 7. See the main ho
Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.
Joda-Time Joda-Time provides a quality replacement for the Java date and time classes. The design allows for multiple calendar systems, while still pr
LWJGL is a Java library that enables cross-platform access to popular native APIs useful in the development of graphics (OpenGL, Vulkan), audio (OpenAL), parallel computing (OpenCL, CUDA) and XR (OpenVR, LibOVR) applications.
LWJGL - Lightweight Java Game Library 3 LWJGL (https://www.lwjgl.org) is a Java library that enables cross-platform access to popular native APIs usef
Backport of Java 8's lambda expressions to Java 7, 6 and 5
Retrolambda: Use Lambdas on Java 7 Just as there was Retroweaver et al. for running Java 5 code with generics on Java 1.4, Retrolambda lets you run Ja
vʌvr (formerly called Javaslang) is a non-commercial, non-profit object-functional library that runs with Java 8+. It aims to reduce the lines of code and increase code quality.
Vavr is an object-functional language extension to Java 8, which aims to reduce the lines of code and increase code quality. It provides persistent co
jOOλ - The Missing Parts in Java 8 jOOλ improves the JDK libraries in areas where the Expert Group's focus was elsewhere. It adds tuple support, function support, and a lot of additional functionality around sequential Streams. The JDK 8's main efforts (default methods, lambdas, and the Stream API) were focused around maintaining backwards compatibility and implementing a functional API for parallelism.
jOOλ jOOλ is part of the jOOQ series (along with jOOQ, jOOX, jOOR, jOOU) providing some useful extensions to Java 8 lambdas. It contains these classes
Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, folds, optics and typeclasses.
Derive4J: Java 8 annotation processor for deriving algebraic data types constructors, pattern matching and more! tl;dr Show me how to write, say, the
Concourse is a container-based continuous thing-doer written in Go and Elm.
Concourse: the continuous thing-doer. Concourse is an automation system written in Go. It is most commonly used for CI/CD, and is built to scale to an
JitPack is a novel package repository for JVM and Android projects.
JitPack is a novel package repository for JVM and Android projects. It builds Git projects on demand and provides you with ready-to-use artifacts (jar, aar).
JPF is an extensible software analysis framework for Java bytecode. jpf-core is the basis for all JPF projects; you always need to install it. It contains the basic VM and model checking infrastructure, and can be used to check for concurrency defects like deadlocks, and unhandled exceptions like NullPointerExceptions and AssertionErrors.
Java Pathfinder (JPF) An extensible software model checking framework for Java bytecode programs General Information about JPF All the latest developm
Packages your JAR, assets and a JVM for distribution on Windows, Linux and Mac OS X
About Packages your JAR, assets and a JVM for distribution on Windows, Linux and macOS, adding a native executable file to make it appear like a nativ
:package: Gradle/Maven plugin to package Java applications as native Windows, Mac OS X, or GNU/Linux executables and create installers for them.
JavaPackager JavaPackager is a hybrid plugin for Maven and Gradle which provides an easy way to package Java applications in native Windows, Mac OS X
Dead-Simple Packaging and Deployment for JVM Apps
Capsule Dead-Simple Packaging and Deployment for JVM Applications Capsule is a packaging and deployment tool for JVM applications. A capsule is a sing
Zuul is a gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
Zuul Zuul is an L7 application gateway that provides capabilities for dynamic routing, monitoring, resiliency, security, and more. Please view the wik
ScaleCube Services is a high throughput, low latency reactive microservices library built to scale. it features: API-Gateways, service-discovery, service-load-balancing, the architecture supports plug-and-play service communication modules and features. built to provide performance and low-latency real-time stream-processing. its open and designed to accommodate changes. (no sidecar in a form of broker or any kind)
scalecube-services MICROSERVICES 2.0 An open-source project that is focused on streamlining reactive-programming of Microservices Reactive-systems tha
Resilience4j is a fault tolerance library designed for Java8 and functional programming
Fault tolerance library designed for functional programming Table of Contents 1. Introduction 2. Documentation 3. Overview 4. Resilience patterns 5. S
Fibers, Channels and Actors for the JVM
Quasar Fibers, Channels and Actors for the JVM Getting started Add the following Maven/Gradle dependencies: Feature Artifact Core (required) co.parall
Fault tolerance and resilience patterns for the JVM
Failsafe Failsafe is a lightweight, zero-dependency library for handling failures in Java 8+, with a concise API for handling everyday use cases and t
simple tail call optimization and stack safety for Java
com.github.kag0.tail simple tail call optimization for Java enables infinitely deep tail recursive calls without throwing a StackOverflowError no tran
Java library for handling exceptions in concise, unified, and architecturally clean way.
NoException NoException is a Java library for handling exceptions in concise, unified, and architecturally clean way. System.out.println(Exceptions.lo
Manifold plugs into Java to supplement it with powerful features, from Type-safe Metaprogramming (direct access to GraphQL, JSON, XML, etc.), Extension Methods, Operator Overloading, and Unit Expressions to an integrated Template Engine and a Preprocessor. All fully supported in IntelliJ IDEA and Android Studio. Simply add Manifold to your project and begin taking advantage of it.
What is Manifold? Manifold plugs into Java to supplement it with powerful features, including: Type-safe Meta-programming Extension Methods Operator O
Java 1-15 Parser and Abstract Syntax Tree for Java, including preview features to Java 13
JavaParser This project contains a set of libraries implementing a Java 1.0 - Java 14 Parser with advanced analysis functionalities. This includes pre
Java unlimited redefinition of classes at runtime.
Hotswap Agent This is an overview page, please visit hotswapagent.org for more information. Overview Java unlimited runtime class and resource redefin
A fast dependency injector for Android and Java.
Dagger A fast dependency injector for Java and Android. Dagger is a compile-time framework for dependency injection. It uses no reflection or runtime
Guice (pronounced 'juice') is a lightweight dependency injection framework for Java 6 and above, brought to you by Google.
Guice Latest release: 5.0.1 Documentation: User Guide, 5.0.1 javadocs, Latest javadocs Continuous Integration: Mailing Lists: User Mailing List Licens
Governator is a library of extensions and utilities that enhance Google Guice to provide: classpath scanning and automatic binding, lifecycle management, configuration to field mapping, field validation and parallelized object warmup.
Governator DESCRIPTION Governator is a library of extensions and utilities that enhance Google Guice to provide injector lifecycle and well as support
Lightweight dependency injection for Java and Android (JSR-330)
About Feather Feather is an ultra-lightweight dependency injection (JSR-330) library for Java and Android. Dependency injection frameworks are often p
Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese
Time4J Advanced date, time and interval library for Java Motivation: Time4J is thought as a complete and high-end replacement for old java classes aro
Provides additional date-time classes that complement those in JDK 8
ThreeTen-Extra ThreeTen-Extra provides additional date-time classes that complement those in JDK 8. Not every piece of date/time logic is destined for
A Java library for parsing and building iCalendar data models
iCal4j - iCalendar parser and object model Table of Contents Introduction - What is iCal4j? Setup - Download and installation of iCal4j System require
Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.
JetBrains Xodus is a transactional schema-less embedded database that is written in Java and Kotlin. It was initially developed for JetBrains YouTrack
Vibur DBCP - concurrent and dynamic JDBC connection pool
Vibur DBCP is concurrent, fast, and fully-featured JDBC connection pool, which provides advanced performance monitoring capabilities, including slow S
sql2o is a small library, which makes it easy to convert the result of your sql-statements into objects. No resultset hacking required. Kind of like an orm, but without the sql-generation capabilities. Supports named parameters.
sql2o Sql2o is a small java library, with the purpose of making database interaction easy. When fetching data from the database, the ResultSet will au
Speedment is a Stream ORM Java Toolkit and Runtime
Java Stream ORM Speedment is an open source Java Stream ORM toolkit and runtime. The toolkit analyzes the metadata of an existing SQL database and aut
Redisson - Redis Java client with features of In-Memory Data Grid. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Publish / Subscribe, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, MyBatis, RPC, local cache ...
Redisson - Redis Java client with features of In-Memory Data Grid Quick start | Documentation | Javadocs | Changelog | Code examples | FAQs | Report a
MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.
MapDB: database engine MapDB combines embedded database engine and Java collections. It is free under Apache 2 license. MapDB is flexible and can be u
A blazingly small and sane redis java client
Jedis Jedis is a blazingly small and sane Redis java client. Jedis was conceived to be EASY to use. Jedis is fully compatible with redis 2.8.x, 3.x.x
FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand.
Introduction The FlexyPool library adds metrics and flexible strategies to a given Connection Pool, allowing it to resize on demand. This is very hand
eXist Native XML Database and Application Platform
eXist-db Native XML Database eXist-db is a high-performance open source native XML database—a NoSQL document database and application platform built e
Replicate your Key Value Store across your network, with consistency, persistance and performance.
Chronicle Map Version Overview Chronicle Map is a super-fast, in-memory, non-blocking, key-value store, designed for low-latency, and/or multi-process
gRPC and protocol buffers for Android, Kotlin, and Java.
Wire “A man got to have a code!” - Omar Little See the project website for documentation and APIs. As our teams and programs grow, the variety and vol
A lightning fast, transactional, file-based FIFO for Android and Java.
Tape by Square, Inc. Tape is a collection of queue-related classes for Android and Java. QueueFile is a lightning-fast, transactional, file-based FIFO
Union, intersection, and set cardinality in loglog space
HyperMinHash-java A Java implementation of the HyperMinHash algorithm, presented by Yu and Weber. HyperMinHash allows approximating set unions, inters
A big, fast and persistent queue based on memory mapped file.
Big Queue A big, fast and persistent queue based on memory mapped file. Notice, bigqueue is just a standalone library, for a high-throughput, persiste
uniVocity-parsers is a suite of extremely fast and reliable parsers for Java. It provides a consistent interface for handling different file formats, and a solid framework for the development of new parsers.
Welcome to univocity-parsers univocity-parsers is a collection of extremely fast and reliable parsers for Java. It provides a consistent interface for
High performance CSV reader and writer for Java.
FastCSV 🚀 FastCSV 2.0 upgrade has landed with major improvements on performance and usability! FastCSV is an ultra-fast and dependency-free RFC 4180
Java Constraint Solver to solve vehicle routing, employee rostering, task assignment, conference scheduling and other planning problems.
OptaPlanner www.optaplanner.org Looking for Quickstarts? OptaPlanner’s quickstarts have moved to optaplanner-quickstarts repository. Quick development
KickAss Configuration. An annotation-based configuration system for Java and Kotlin
KAConf 2016-2020 Mario Macías KickAss Configuration v0.9.0 is an Annotation-based configuration system inspired in the wonderful Spring Boot. Its stro
A simple configuration library for Java applications providing a node structure, a variety of formats, and tools for transformation
Configurate Configurate is a simple configuration library for Java applications that provides a node-based representation of data, able to handle a wi
Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2
Visit the official web site for more information. Central Dogma Central Dogma is an open-source, highly-available and version-controlled service confi
Java interface to OpenCV, FFmpeg, and more
JavaCV Commercial support: Introduction JavaCV uses wrappers from the JavaCPP Presets of commonly used libraries by researchers in the field of comput
Fast computer vision library for SFM, calibration, fiducials, tracking, image processing, and more.
Table of Contents Introduction Cloning Repository Quick Start Gradle and Maven Building from Source Dependencies Help/Contact Introduction BoofCV is a
JavaCC - a parser generator for building parsers from grammars. It can generate code in Java, C++ and C#.
JavaCC Java Compiler Compiler (JavaCC) is the most popular parser generator for use with Java applications. A parser generator is a tool that reads a
Java library to provide an API for beans and properties.
Joda-Beans Joda-Beans provides a small framework that adds properties to Java, greatly enhancing JavaBeans. An API is provided that defines a bean and
Annotation processor to create immutable objects and builders. Feels like Guava's immutable collections but for regular value objects. JSON, Jackson, Gson, JAX-RS integrations included
Read full documentation at http://immutables.org // Define abstract value type using interface, abstract class or annotation @Value.Immutable public i
Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps can include as source & avoid adding a dependency. Written in Java, usable from Groovy, Kotlin, Scala, etc.
picocli - a mighty tiny command line interface Picocli aims to be the easiest-to-use way to create rich command line applications that can run on and
Spoon is a metaprogramming library to analyze and transform Java source code (up to Java 15). :spoon: is made with :heart:, :beers: and :sparkles:. It parses source files to build a well-designed AST with powerful analysis and transformation API.
Spoon Spoon is an open-source library to analyze, rewrite, transform, transpile Java source code. It parses source files to build a well-designed AST
:coffee: SonarSource Static Analyzer for Java Code Quality and Security
Code Quality and Security for Java This SonarSource project is a code analyzer for Java projects. Information about the analysis of Java features is a
A static analyzer for Java, C, C++, and Objective-C
Infer Infer is a static analysis tool for Java, C++, Objective-C, and C. Infer is written in OCaml. Installation Read our Getting Started page for det
Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.
Checkstyle is a tool for checking Java source code for adherence to a Code Standard or set of validation rules (best practices). Members chat: Contrib
Several implementations of a text table, originally using ASCII and UTF-8 characters for borders.
ASCII Table ASCII table - A simple tool to format tables with various row/column options for indentation, indentation character, alignment, padding (l
Infinispan is an open source data grid platform and highly scalable NoSQL cloud data store.
The Infinispan project Infinispan is an open source (under the Apache License, v2.0) data grid platform. For more information on Infinispan, including
Mixin is a trait/mixin and bytecode weaving framework for Java using ASM
Mixin is a trait/mixin framework for Java using ASM and hooking into the runtime classloading process via a set of pluggable built-in or user-provided
cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept field access.
cglib Byte Code Generation Library is high level API to generate and transform JAVA byte code. It is used by AOP, testing, data access frameworks to g
a fast, scalable, multi-language and extensible build system
Bazel {Fast, Correct} - Choose two Build and test software of any size, quickly and reliably. Speed up your builds and tests: Bazel rebuilds only what
A fast build system that encourages the creation of small, reusable modules over a variety of platforms and languages.
Buck Buck is a build tool. To see what Buck can do for you, check out the documentation at http://buck.build/. Installation Since Buck is used to buil
Simpler, better and faster Java bean mapping framework
Orika ! NEW We are pleased to announce the release of Orika 1.5.4 ! This version is available on Maven central repository What? Orika is a Java Bean m
Elegance, high performance and robustness all in one java bean mapper
JMapper Framework Fast as hand-written code with zero compromise. Artifact information Status Write the configuration using what you prefer: Annotatio
dOOv (Domain Object Oriented Validation) a fluent API for type-safe bean validation and mapping
dOOv (Domain Object Oriented Validation) dOOv is a fluent API for typesafe domain model validation and mapping. It uses annotations, code generation a