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awesome-java

A curated list of awesome frameworks, libraries and software for the Java programming language.
https://github.com/eric-erki/awesome-java

Last synced: 1 day ago
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Projects
- Bean Mapping
  - dOOv - Provides fluent API for typesafe domain model validation and mapping. It uses annotations, code generation and a type safe DSL to make bean validation and mapping fast and easy.
  - Dozer - Mapper that copies data from one object to another using annotations and API or XML configuration.
  - JMapper - Uses byte code manipulation for lightning-fast mapping. Supports annotations and API or XML configuration.
  - MapStruct - Code generator that simplifies mappings between different bean types, based on a convention-over-configuration approach.
  - ModelMapper - Intelligent object mapping library that automatically maps objects to each other.
  - Orika - JavaBean-mapping framework that recursively copies (among other capabilities) data from one object to another.
  - reMap - Lambda and method handle-based mapping which requires code and not annotations if objects have different names.
  - Selma - Annotation processor-based bean mapper.
- Build
  - Buck - Encourages the creation of small, reusable modules consisting of code and resources.
  - Gradle - Incremental builds programmed via Groovy instead of declaring XML. Works well with Maven's dependency management.
- Bytecode Manipulation
  - bytecode-viewer - Java 8 Jar & Android APK reverse engineering suite. (GPL-3.0-only)
  - cglib - Bytecode generation library.
  - Javassist - Tries to simplify bytecode editing.
  - Mixin - Manipulate bytecode at runtime using real Java code.
  - Perses - Dynamically injects failure/latency at the bytecode level according to principles of chaos engineering.
  - Byteman - Manipulate bytecode at runtime via DSL (rules); mainly for testing/troubleshooting. (LGPL-2.1-or-later)
- Caching
  - Caffeine - High-performance, near-optimal caching library.
- CLI
  - ASCII Table - Library to draw tables in ASCII.
  - Airline - Annotation-based framework for parsing Git-like command-line arguments.
  - args4j - Small library to parse command-line arguments.
  - Jansi - ANSI escape codes to format console output.
  - Java ASCII Render - Graphical primitives for the console.
  - JCommander - Command-line argument-parsing framework with custom types and validation via implementing interfaces.
  - jbock - Typesafe, reflection-free, annotation based command-line parser.
  - JLine - Includes features from modern shells like completion or history.
  - JOpt Simple - Fluent parser that uses the POSIX#getopt and GNU#getopt_long syntaxes.
  - Text-IO - Aids the creation of full console-based applications.
  - Lanterna - Easy console text-GUI library, similar to curses. (LGPL-3.0-only)
- Cluster Management
  - Singularity - Mesos framework that makes deployment and operations easy. It supports web services, background workers, scheduled jobs, and one-off tasks.
- Code Analysis
  - Checkstyle - Static analysis of coding conventions and standards. (LGPL-2.1-or-later)
  - Error Prone - Catches common programming mistakes as compile-time errors.
  - NullAway - Eliminates NullPointerExceptions with low build-time overhead.
  - PMD - Source code analysis for finding bad coding practices.
  - SonarJava - Static analyzer for SonarQube & SonarLint. (LGPL-3.0-only)
  - Spoon - Library for analyzing and transforming Java source code.
  - Spotbugs - Static analysis of bytecode to find potential bugs. (LGPL-2.1-only)
  - Infer - Modern static analysis tool for verifying the correctness of code.
  - jQAssistant - Static code analysis with Neo4J-based query language. (GPL-3.0-only)
- Code Coverage
  - Cobertura - Relies on offline (or static) bytecode instrumentation and class loading to collect code coverage metrics. (GPL-2.0-only)
  - Clover - Relies on source-code instrumentation instead of bytecode instrumentation.
  - JaCoCo - Framework that enables collection of code coverage metrics, using both offline and runtime bytecode instrumentation.
- Code Generators
  - ADT4J - JSR-269 code generator for algebraic data types.
  - Auto - Generates factory, service, and value classes.
  - FreeBuilder - Automatically generates the Builder pattern.
  - JavaPoet - API to generate source files.
  - JHipster - Yeoman source code generator for Spring Boot and AngularJS.
  - Joda-Beans - Small framework that adds queryable properties to Java, enhancing JavaBeans.
- Compiler-compiler
  - JavaCC - Parser generator that generates top-down parsers. Allows lexical state switching and permits extended BNF specifications.
- Configuration
  - centraldogma - Highly-available version-controlled service configuration repository based on Git, ZooKeeper and HTTP/2.
  - cfg4j - Modern configuration library for distributed apps written in Java.
  - config - Configuration library for JVM languages.
  - dotenv - Twelve-factor configuration library which uses environment-specific files.
  - KAConf - Annotation-based configuration system for Java and Kotlin.
  - owner - Reduces boilerplate of properties.
  - owner - Reduces boilerplate of properties.
- Constraint Satisfaction Problem Solver
  - JaCoP - Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models. (AGPL-3.0)
- CSV
  - jackson-dataformat-csv - Jackson extension for reading and writing CSV.
  - Super CSV - Powerful CSV parser with support for Dozer, Joda-Time and Java 8.
  - uniVocity-parsers - One of the fastest and most feature-complete parsers. Also comes with parsers for TSV and fixed-width records.
- Data Structures
  - Big Queue - Fast and persistent queue based on memory-mapped files.
  - HyperMinHash-java - Probabilistic data structure for computing union, intersection, and set cardinality in loglog space.
  - Persistent Collection - Persistent and immutable analogue of the Java Collections Framework.
  - Protobuf - Google's data interchange format.
  - SBE - Simple Binary Encoding, one of the fastest message formats around.
  - Wire - Clean, lightweight protocol buffers.
  - Tape - Lightning-fast, transactional, file-based FIFO.
- Database
  - AranoDB - ArangoDB Java driver.
  - Chronicle Map - Efficient, in-memory (opt. persisted to disk), off-heap key-value store.
  - eXist - NoSQL document database and application platform. (LGPL-2.1-only)
  - FlexyPool - Brings metrics and failover strategies to the most common connection pooling solutions.
  - Flyway - Simple database migration tool.
  - HikariCP - High-performance JDBC connection pool.
  - jasync-sql - Async DB driver for MySQL and PostgreSQL.
  - JDBI - Convenient abstraction of JDBC.
  - Jest - Client for the Elasticsearch REST API.
  - jetcd - Client library for etcd.
  - Jinq - Typesafe database queries via symbolic execution of Java 8 Lambdas (on top of JPA or jOOQ).
  - Leaf - Distributed ID generate service.
  - MariaDB4j - Launcher for MariaDB that requires no installation or external dependencies.
  - Redisson - Allows for distributed and scalable data structures on top of a Redis server.
  - Speedment - Database access library that utilizes Java 8's Stream API for querying.
  - Realm - Mobile database to run directly inside phones, tablets or wearables.
  - requery - Modern, lightweight but powerful object mapping and SQL generator. Easily map to or create databases, or perform queries and updates from any Java-using platform.
  - Xodus - Highly concurrent transactional schema-less and ACID-compliant embedded database.
  - Jedis - Small client for interaction with Redis, with methods for commands.
  - Querydsl - Typesafe unified queries.
  - Liquibase - Database-independent library for tracking, managing and applying database schema changes.
  - Presto - Distributed SQL query engine for big data.
- Date and Time
  - iCal4j - Parse and build iCalendar [RFC 5545](https://tools.ietf.org/html/rfc5545) data models.
  - ThreeTen-Extra - Additional date-time classes that complement those in JDK 8.
  - Time4J - Advanced date and time library. (LGPL-2.1-only)
  - Almanac Converter - Simple conversion between different calendar systems.
- Dependency Injection
  - Feather - Ultra-lightweight, JSR-330-compliant dependency injection library.
  - Governator - Extensions and utilities that enhance Google Guice.
  - Guice - Lightweight and opinionated framework that completes Dagger.
  - HK2 - Lightweight and dynamic dependency injection framework.
  - JayWire - Lightweight dependency injection framework. (LGPL-3.0-only)
  - Inversion of Control
  - Dagger - Compile-time injection framework without reflection.
- Development
  - JavaSymbolSolver - Symbol solver.
  - Manifold - Re-energizes Java with powerful features like type-safe metaprogramming, structural typing and extension methods.
  - Faux Pas - Library that simplifies error handling by circumventing the issue that none of the functional interfaces in the Java Runtime is allowed by default to throw checked exceptions.
  - HotswapAgent - Unlimited runtime class and resource redefinition. (GPL-2.0-only)
  - JavaParser - Parse, modify and generate Java code.
  - SneakyThrow - Ignores checked exceptions without bytecode manipulation. Can also be used inside Java 8 stream operations.
- Distributed Applications
  - Dropwizard Circuit Breaker - Circuit breaker design pattern for Dropwizard. (GPL-2.0-only)
  - JGroups - Toolkit for reliable messaging and cluster creation.
  - Orbit - Virtual actors; adds another level of abstraction to traditional actors.
  - resilience4j - Functional fault tolerance library.
  - ScaleCube Services - Embeddable Cluster-Membership library based on SWIM and gossip protocol.
  - Zuul - Gateway service that provides dynamic routing, monitoring, resiliency, security, and more.
  - Quasar - Lightweight threads and actors for the JVM.
  - Failsafe - Simple failure handling with retries and circuit breakers.
- Distributed Transactions
  - Bitronix - Simple but complete implementation of the JTA 1.1 API.
  - Seata - Delivers high performance and easy to use distributed transaction services under a microservices architecture.
- Distribution
  - Capsule - Simple and powerful packaging and deployment. A fat JAR on steroids, or a "Docker for Java" that supports JVM-optimized containers.
  - packr - Packs JARs, assets and the JVM for native distribution on Windows, Linux and macOS.
  - really-executable-jars-maven-plugin - Maven plugin for making self-executing JARs.
  - IzPack - Setup authoring tool for cross-platform deployments.
  - jlink.online - Builds optimized runtimes over HTTP.
- Document Processing
  - zerocell - Annotation-based API for reading data from Excel sheets into POJOs with focus on reduced overhead.
  - documents4j - API for document format conversion using third-party converters such as MS Word.
  - docx4j - Create and manipulate Microsoft Open XML files.
- Financial
  - Parity - Platform for trading venues.
  - Philadelphia - Low-latency financial information exchange.
  - Square - Integration with the Square API.
  - Stripe - Integration with the Stripe API.
- Formal Verification
  - CATG - Concolic unit testing engine. Automatically generates unit tests using formal methods.
  - Java Path Finder (JPF) - JVM formal verification tool containing a model checker and more. Created by NASA.
  - OpenJML - Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers. (GPL-2.0-only)
  - Daikon - Detects likely program invariants and generates JML specs based on those invariants.
  - JMLOK 2.0 - Detects inconsistencies between code and JML specification through feedback-directed random tests generation, and suggests a likely cause for each nonconformance detected. (GPL-3.0-only)
- Functional Programming
  - derive4j - Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching and morphisms. (GPL-3.0-only)
  - Fugue - Functional extensions to Guava.
  - jOOλ - Extension to Java 8 that aims to fix gaps in lambda by providing numerous missing types and a rich set of sequential Stream API additions.
  - protonpack - Collection of stream utilities.
  - StreamEx - Enhances Java 8 Streams.
  - Functional Java - Implements numerous basic and advanced programming abstractions that assist composition-oriented development.
  - Vavr - Functional component library that provides persistent data types and functional control structures.
- Game Development
  - FXGL - JavaFX Game Development Framework.
  - libGDX - All-round cross-platform, high-level framework.
- Geospatial
  - Geo - GeoHash utilities in Java.
  - Geotoolkit.org - Library for developing geospatial applications. Built on top of the Apache SIS project. (LGPL-2.1-only)
  - GraphHopper - Road-routing engine. Used as a Java library or standalone web service.
  - H2GIS - Spatial extension of the H2 database. (LGPL-3.0-only)
  - Jgeohash - Library for using the GeoHash algorithm.
  - Mapsforge - Map rendering based on OpenStreetMap data. (LGPL-3.0-only)
  - Spatial4j - General-purpose spatial/geospatial library.
- High Performance
  - Agrona - Data structures and utility methods that are common in high-performance applications.
  - Disruptor - Inter-thread messaging library.
  - Eclipse Collections - Collections framework inspired by Smalltalk.
  - JCTools - Concurrency tools currently missing from the JDK.
  - HPPC - Primitive collections.
  - Koloboke - Hash sets and hash maps.
  - fastutil - Fast and compact type-specific collections.
- HTTP Clients
  - Async Http Client - Asynchronous HTTP and WebSocket client library.
  - Feign - HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.
  - Play WS - Typesafe client with reactive streams and caching.
  - Ribbon - Client-side IPC library that is battle-tested in cloud.
  - Riptide - Client-side response routing for Spring's RestTemplate.
  - unirest-java - Simplified, lightweight HTTP client library.
  - restQL-core-java - Microservice query language that fetches information from multiple services.
- Hypermedia Types
  - JSON-LD - JSON-LD implementation.
  - Siren4J - Library for the Siren specification.
- Imagery
  - Tess4J - JNA wrapper for Tesseract OCR API.
  - Thumbnailator - High-quality thumbnail generation library.
  - TwelveMonkeys - Collection of plugins that extend the number of supported image file formats.
  - image-comparison - Compares two images with the same sizes and shows the differences visually by drawing rectangles.
  - ZXing - Multi-format 1D/2D barcode image processing library.
- Introspection
  - ClassGraph - ClassGraph (formerly FastClasspathScanner) is an uber-fast, ultra-lightweight, parallelized classpath scanner and module scanner for Java, Scala, Kotlin and other JVM languages.
  - jOOR - jOOR stands for jOOR Object Oriented Reflection. It is a simple wrapper for the java.lang.reflect package.
  - Mirror - Mirror was created to bring light to a simple problem, usually named ReflectionUtil, which is on almost all projects that rely on reflection to do advanced tasks.
  - ReflectASM - ReflectASM is a very small Java library that provides high performance reflection by using code generation.
  - Reflections - Reflections scans your classpath, indexes the metadata, allows you to query it on runtime and may save and collect that information for many modules within your project.
- Job Scheduling
  - Quartz - Feature-rich, open source job scheduling library that can be integrated within virtually any Java application.
  - Sundial - Lightweight framework to simply define jobs, define triggers and start the scheduler.
  - Wisp - Simple library with minimal footprint and straightforward API.
  - db-scheduler - Persistent and cluster-friendly scheduler.
- JSON
  - DSL-JSON - JSON library with advanced compile time databinding.
  - HikariJSON - High-performance JSON parser, 2x faster than Jackson.
  - jackson-modules-java8 - Set of Jackson modules for Java 8 datatypes and features.
  - Jackson-datatype-money - Open-source Jackson module to support JSON serialization and deserialization of JavaMoney data types.
  - JSON-io - Convert Java to JSON. Convert JSON to Java. Pretty print JSON. Java JSON serializer.
  - jsoniter - Fast and flexible library with iterator and lazy parsing API.
  - LoganSquare - JSON parsing and serializing library based on Jackson's streaming API. Outperforms GSON & Jackson's library.
  - Yasson - Binding layer between classes and JSON documents similar to JAXB.
  - fastjson - Very fast processor with no additional dependencies and full data binding.
  - Jolt - JSON to JSON transformation tool.
  - JsonSurfer - Streaming JsonPath processor dedicated to processing big and complicated JSON data.
  - Gson - Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.
  - Jackson - Similar to GSON, but offers performance gains if you need to instantiate the library more often.
  - Moshi - Modern JSON library, less opinionated and uses built-in types like List and Map.
  - Genson - Powerful and easy-to-use Java-to-JSON conversion library.
- JVM and JDK
  - Avian - JVM with JIT, AOT modes and iOS port.
  - Graal - Polyglot embeddable JVM. (GPL-2.0-only WITH Classpath-exception-2.0)
  - OpenJ9 - High performance, enterprise-calibre, flexibly licensed, openly-governed cross-platform JVM extending and augmenting the runtime technology components from the Eclipse OMR and OpenJDK project.
  - SAP Machine - SAP's no-cost, rigorously tested and JCK-verified OpenJDK friendly fork. (GPL-2.0-only WITH Classpath-exception-2.0)
  - Liberica JDK - Built from OpenJDK, thoroughly tested and passed the JCK. (GPL-2.0-only WITH Classpath-exception-2.0)
  - Open JDK - Open JDK community home. (GPL-2.0-only WITH Classpath-exception-2.0)
  - ParparVM - VM with non-blocking, concurrent GC for iOS. (GPL-2.0-only WITH Classpath-exception-2.0)
  - RedHat Open JDK - RedHat's OpenJDK distribution. (GPL-2.0-only WITH Classpath-exception-2.0)
  - Adopt Open JDK - Community-driven OpenJDK builds, including both HotSpot and OpenJ9.
- Logging
  - Logbook - Extensible, open-source library for HTTP request and response logging.
  - p6spy - Enables logging for all JDBC transactions without changes to the code.
  - Tracer - Call tracing and log correlation in distributed systems.
- Machine Learning
  - DatumBox - Provides several algorithms and pre-trained models for natural language processing.
  - DeepDive - Creates structured information from unstructured data and integrates it into an existing database.
  - JSAT - Algorithms for pre-processing, classification, regression, and clustering with support for multi-threaded execution. (GPL-3.0-only)
  - Oryx 2 - Framework for building real-time, large-scale machine learning applications. Includes end-to-end applications for collaborative filtering, classification, regression, and clustering.
  - Smile - Statistical Machine Intelligence and Learning Engine provides a set of machine learning algorithms and a visualization library.
  - Synapses - Lightweight library for neural networks.
  - Weka - Collection of algorithms for data mining tasks ranging from pre-processing to visualization. (GPL-3.0-only)
- Messaging
  - Aeron - Efficient, reliable, unicast and multicast message transport.
  - EventBus - Simple publish/subscribe event bus.
  - JeroMQ - Implementation of ZeroMQ.
  - Nakadi - Provides a RESTful API on top of Kafka.
  - RabbitMQ Java client - RabbitMQ client.
  - Smack - Cross-platform XMPP client library.
  - NATS client - NATS client.
- Microservice
  - Apollo - Libraries for writing composable microservices.
  - Armeria - Asynchronous RPC/REST client/server library built on top of Java 8, Netty, HTTP/2, Thrift and gRPC.
  - consul-api - Client for the Consul API: a distributed, highly available and datacenter-aware registry/discovery service.
  - Eureka - REST-based service registry for resilient load balancing and failover.
- Miscellaneous
  - CQEngine - Ultra-fast, SQL-like queries on Java collections.
  - Design Patterns - Implementation and explanation of the most common design patterns.
  - FF4J - Feature Flags for Java.
  - FizzBuzz Enterprise Edition - No-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes. (No explicit license)
  - J2ObjC - Java-to-Objective-C translator for porting Android libraries to iOS.
  - JavaCV - Java interface to OpenCV, FFmpeg, and more.
  - JBot - Framework for building chatbots. (GPL-3.0-only)
  - JCuda - JCuda offers Java bindings for CUDA and CUDA-related libraries.
  - Jimfs - In-memory file system.
  - JPad - Snippet runner.
  - Maven Wrapper - Analogue of Gradle Wrapper for Maven, allows building projects without installing maven.
  - Membrane Service Proxy - Open-source, reverse-proxy framework.
  - MinimalFTP - Lightweight, small and customizable FTP server.
  - Modern Java - A Guide to Java 8 - Popular Java 8 guide.
  - Modernizer - Detect uses of legacy Java APIs.
  - OctoLinker - Browser extension which allows to navigate through code on GitHub more efficiently.
  - PipelinR - Small utility library for using handlers and commands with pipelines.
  - Polyglot for Maven - Extensions for Maven 3.3.1+ that allows writing the POM model in dialects other than XML.
  - Simple Java Mail - Mailing with a clean and fluent API.
  - Smooks - Extensible framework for building applications that process data which means bindings, transformations, message processing and enrichment. (LGPL-3.0-only)
  - TypeTools - Tools for resolving generic types.
  - XMLBeam - Processes XML by using annotations or XPath within code.
  - yGuard - Obfuscation via renaming and shrinking.
  - JavaX - Reinventing and extending Java with a focus on simplicity. (No explicit license)
- Monitoring
  - Automon - Combines the power of AOP with monitoring and/or logging tools.
  - Failsafe Actuator - Out of the box monitoring of Failsafe Circuit Breaker in Spring-Boot environment.
  - LeakCanary - Memory leak detection.
- PDF
  - Dynamic Jasper - Abstraction layer to JasperReports. (LGPL-3.0-only)
- Platform
  - Chain - Chain of Responsibility pattern implementation.
  - Functor - Function that can be manipulated as an object, or an object representing a single, generic function.
  - Logging - Wrapper around a variety of logging API implementations.
  - OGNL - Object-graph navigation language.
  - Proxy - Library for creating dynamic proxies.
- GUI
  - JavaFX - Successor of Swing.
- IDE
  - Visual Studio Code - Provides Java support for lightweight projects with a simple, modern workflow by using extensions from the internal marketplace.
- Natural Language Processing
  - CoreNLP - Provides a set of fundamental tools for tasks like tagging, named entity recognition, and sentiment analysis. (GPL-3.0-or-later)
- ORM
  - Doma 2 - Database access framework that verifies and generates source code at compile time using annotation processing as well as native SQL templates called two-way SQL.
  - EclipseLink - Supports a number of persistence standards: JPA, JAXB, JCA and SDO.
- Performance analysis
  - JMH - Harness for building, running, and analysing nano/micro/milli/macro benchmarks written in Java and other languages targeting the JVM. (GPL-2.0 only WITH Classpath-exception-2.0)
- Reactive libraries
  - RxJava - Allows for composing asynchronous and event-based programs using observable sequences.
- Science
  - Morpheus - Provides a versatile two-dimensional memory efficient tabular data structure called a DataFrame to enable efficient in-memory analytics for scientific computing on the JVM.
- Security
  - Bouncy Castle - All-purpose cryptographic library and JCA provider offering a wide range of functions, from basic helpers to PGP/SMIME operations.
  - Themis - Multi-platform high-level cryptographic library provides easy-to-use encryption for protecting sensitive data: secure messaging with forward secrecy, secure data storage (AES256GCM); suits for building end-to-end encrypted applications.
- Testing
  - GreenMail - In-memory email server for integration testing. Supports SMTP, POP3 and IMAP including SSL. (GPL-2.0-only)
  - Serenity BDD - Automated Acceptance testing and reporting library that works with Cucumber, JBehave and JUnit to make it easier to write high quality executable specifications.
- Utility
  - Guava - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and more.
  - JADE - Framework and environment for building and debugging multi-agent systems. (LGPL-2.0-only)
- Web Frameworks
  - Vaadin Flow - Event-driven framework that uses standard web components. Server-side architecture with Ajax on the client side.
- REST Frameworks
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - RESTEasy - Fully certified and portable implementation of the JAX-RS specification.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
  - Crnk - Implementation of the JSON API specification to build resource-oriented REST endpoints with sorting, filtering, paging, linking, object graphs, type-safety, bulk updates, integrations and more.
- Template Engine
  - Jtwig - Modular, configurable and fully tested template engine.
  - Jtwig - Modular, configurable and fully tested template engine.
- Search
  - Elasticsearch - Distributed, multitenant-capable, full-text search engine with a RESTful web interface and schema-free JSON documents.
- Server
  - Jetty - Provides a Web server and javax.servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.
Resources
- Awesome Lists
- Communities
  - r/java - Subreddit for the Java community.
  - Stack Overflow - Question/answer platform.
  - VirtualJUG - Virtual Java User Group.
- Influential Books
- Podcasts and Screencasts
  - The Java Council
- Twitter
  - Aleksey Shipilëv - Performance geek, benchmarking czar, concurrency bug hunter.
  - Brian Goetz - Java Language Architect at Oracle.
  - Bruno Borges - Product Manager/Java Jock at Oracle.
  - Chris Richardson - Software architect, consultant, and serial entrepreneur, Java Champion, JavaOne Rock Star, \*POJOs in Action- author.
  - Ed Burns - Consulting Member of the Technical Staff at Oracle.
  - Eugen Paraschiv - Author of the Spring Security Course.
  - Heinz Kabutz - Java Champion, speaker, author of The Java Specialists' Newsletter, concurrency performance expert.
  - Holly Cummins - Technical Lead of IBM London's Bluemix Garage, Java Champion, developer, author, JavaOne rockstar.
  - James Weaver - Java/JavaFX/IoT developer, author and speaker.
  - Java Magazine - Official Java Magazine account.
  - Javin Paul - Well-known Java blogger.
  - Josh Long - Spring Advocate at Pivotal, author of O'Reilly's Cloud Native Java- and Building Microservices with Spring Boot, JavaOne Rock Star.
  - Lukas Eder - Java Champion, speaker, JUG.ch co-leader, Founder and CEO Data Geekery (jOOQ).
  - Mario Fusco - RedHatter, JUG coordinator, frequent speaker and author.
  - Mark Heckler - Pivotal Principal Technologist and Developer Advocate, conference speaker, published author, and Java Champion, focusing on Internet of Things and the cloud.
  - Mark Reinhold - Chief Architect, Java Platform Group, Oracle.
  - Markus Eisele - Java EE evangelist, Red Hat.
  - Martijn Verburg - London JUG co-leader, speaker, author, Java Champion and much more.
  - Martin Thompson - Pasty faced performance gangster.
  - Monica Beckwith - Performance consultant, JavaOne Rock Star.
  - OpenJDK - Official OpenJDK account.
  - Peter Lawrey - Peter Lawrey, Java performance expert.
  - Randy Shoup - Stitch Fix VP Engineering, speaker, JavaOne Rock Star.
  - Reza Rahman - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker.
  - Sander Mak - Java Champion, author.
  - Simon Maple - Java Champion, VirtualJUG founder, LJC leader, RebelLabs author.
  - Spencer Gibb - Software Engineer, Dad, Geek, Co-founder and Lead of Spring Cloud Core @pivotal.
  - Stephen Colebourne - Java Champion, speaker.
  - Trisha Gee - Java Champion and speaker.
  - Venkat Subramaniam - Author, University of Houston professor, MicroSoft MVP award recipient, JavaOne Rock Star, Java Champion.
  - Vlad Mihalcea - Java Champion working on Hypersistence Optimizer, database aficionado, author of High-Performance Java Persistence book.
- Websites
Contributing
- Websites
  - CONTRIBUTING - java-validation).

Programming Languages

Java 178 Kotlin 4 C++ 3 C 1 OCaml 1 HTML 1 Scala 1 java 1 TypeScript 1

Ecosyste.ms: Awesome

awesome-java

Projects

Bean Mapping

Build

Bytecode Manipulation

Caching

CLI

Cluster Management

Code Analysis

Code Coverage

Code Generators

Compiler-compiler

Configuration

Constraint Satisfaction Problem Solver

CSV

Data Structures

Database

Date and Time

Dependency Injection

Development

Distributed Applications

Distributed Transactions

Distribution

Document Processing

Financial

Formal Verification

Functional Programming

Game Development

Geospatial

High Performance

HTTP Clients

Hypermedia Types

Imagery

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Websites