Beispiele & Funktionen / Java

JAVA – Linksammlung (Blogs, Tutorials, Codebeispiele, Frameworks)

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Das ist eine Link-Sammlung, von Blogs, Tutorials, Codebeispielen, Frameworks, usw., die mit Java zu tun haben.

Tutorials & Codebeispiele

Allgemein
CompletableFuture
Executors
TableView

Blogs

Frameworks

  • afterburner.fx – afterburner.fx ist ein minimalistisches (3 Klassen) JavaFX MVP-Framework, das auf Convention over Configuration und Dependency Injection basiert.
  • APX – Eine JavaFX-Bibliothek zum Erstellen und Implementieren von MVC-Typ-Anwendungen.
  • Basilisk – Framework für Desktop-/Mobil-JavaFX-Anwendungen. Apache-Lizenz V2
  • DataFX – DataFX ist ein JavaFX-Framework, das zusätzliche Funktionen zum Erstellen von MVC-basierten Anwendungen in JavaFX bietet, indem es Routing und einen Kontext für CDI bereitstellt.
  • Dolphin Platform – Dolphin Platform ist ein Client/Server-Framework, das eine asynchrone Kommunikation zwischen einem Server und einem Client basierend auf dem Remote-Präsentationsmodellmuster bereitstellt.
  • EasyBind – EasyBind nutzt Lambdas, um Boilerplates beim Erstellen benutzerdefinierter Bindungen zu reduzieren.
  • EasyFXML – EasyFXML ist ein voll funktionsfähiges eigenwilliges JavaFX-Framework, das auf Vavr und Spring Boot basiert und die meisten der lästigen Boilerplates verwaltet, die mit JavaFX geliefert werden. Apache-Lizenz V2.
  • FXGL – JavaFX Game Development Framework.
  • Griffon – Desktop-Anwendungsentwicklungsplattform der nächsten Generation für die JVM. Apache-Lizenz V2.
  • JacpFX – Ein UI-Anwendungsframework basierend auf JavaFX.
  • JRebirth – JRebirth JavaFX Application Framework bietet eine wirklich einfache Möglichkeit, anspruchsvolle und leistungsstarke RIA- und Desktop-Anwendungen zu schreiben.
  • mvvmFX – mvvm(fx) ist ein Anwendungsframework, das Ihnen die notwendigen Komponenten zur Implementierung des MVVM-Musters mit JavaFX bereitstellt. Apache-Lizenz V2.
  • Open Lowcode – Ein Low-Code-Framework für Unternehmenssoftware mit einem JavaFX-Thin-Client.
  • ReactiveDeskFX – JavaFX-Mikroframework zur sehr schnellen Entwicklung von JavaFX-Komponenten mit minimalem Code nach dem MVVM-Architekturmuster mit passiver Ansicht.
  • ReduxFX – Functional Reactive Programming (FRP) für JavaFX, inspiriert von der JavaScript-Bibliothek Redux.js.
  • ScalaFX – vereinfacht die Erstellung von JavaFX-basierten Benutzeroberflächen in Scala.
  • TornadoFX – Leichtes JavaFX-Framework für Kotlin.
  • WorkbenchFX – Ein leichtes RCP-Framework für JavaFX-Anwendungen.
Links zu Frameworksammlungen
Mein Sammlung
  • Advanced-Bindings – ist eine Sammlung nützlicher Helfer und benutzerdefinierter Bindungsimplementierungen wie java.lang.Math oder Switch-Case als JavaFX-Bindung.
  • AnchorFX – ist eine kostenlose Open-Source-Bibliothek für JavaFX, mit der grafische Oberflächen mit Docking-Funktionen erstellt werden können.
  • AnimateFX – Eine JavaFX-Bibliothek mit gebrauchsfertigen Animationen.
  • BootstrapFX – ist ein Abklatsch von Twitter Bootstrap für JavaFX.
  • CalendarFX – ist ein Kalenderframework für JavaFX 8. Es enthält eine Reihe professioneller benutzerdefinierter Steuerelemente, mit denen eine Kalender-Benutzeroberfläche für jede Art von Anwendung implementiert werden kann.
  • ChartFx – ist eine wissenschaftliche Diagrammbibliothek, die am GSI entwickelt wurde und sich auf die leistungsoptimierte Echtzeit-Datenvisualisierung für Datensätze mit bis zu Millionen von Daten konzentriert Datenpunkt.
  • CssFX – Steigert die Entwicklerproduktivität durch Bereitstellung von JavaFX CSS-Funktionen zum erneuten Laden in einer laufenden Anwendung. Kann als eigenständige Bibliothek verwendet oder in den Scenic View integriert werden.
  • ControlsFX – ist ein Open-Source-Projekt für JavaFX, das darauf abzielt, wirklich hochwertige UI-Steuerelemente und andere Tools bereitzustellen, die die JavaFX-Kerndistribution ergänzen.
  • CustomStage – ist eine vollständig anpassbare nicht dekorierte JavaFX-Stage (Window) mit erstaunlichen Funktionen.
  • DesktopPaneFX – ermöglicht es Fenster in einer Pane zu erstellen.
  • FlexGanttFX – ist das fortschrittlichste JavaFX-basierte Gantt-Diagramm-Framework, das derzeit für Java verfügbar ist.
  • Flowless – es werden nur die aktuell sichtbaren Zellen in der Scene gerendert, auch bei Tausendenten von Elementen, werden beispielsweise nur 30 Zellen gerendert.
  • FormsFX – Elemente zum einfachen erstellen von Formularen für eine JavaFX-Benutzeroberfläche.
  • FroXty – frostiger / durchscheinender Effekt auf JavaFX Panen oder Nodes.
  • FX-BorderlessScene – Nicht dekorierte JavaFX-Scene mit implementierten Steuerelementen zum Verschieben, Ändern der Größe, Minimieren, Maximieren und Schließen.
  • FXFileChooser – bietet eine alternative Dateiauswahl, die besonders für extrem große Verzeichnisse geeignet ist, bei denen eine integrierte Live-Suche und Filterung hilfreich sein kann.
  • FXForm2 – ist eine automatische JavaFX-Formulargenerierung. Das generierte Formular ist in hohem Maße konfigurierbar und kann mithilfe von Code, Anmerkungen und CSS-Stil gestaltet werden. FXForm2 ist mit dem JSR 303 für die Bean-Validierung kompatibel.
  • FXGraphics2D – Eine Bibliothek, die eine Graphics2D-API zum Zeichnen auf dem JavaFX-Canvas bereitstellt, damit vorhandener Java2D-Code problemlos wiederverwendet werden kann. Diese Bibliothek wurde erstellt, um JavaFX-Unterstützung für JFreeChart bereitzustellen.
  • JFreeSVG – ist eine Grafikbibliothek für die Java ™ -Plattform, mit der Sie Inhalte im SVG-Format mithilfe der Standard-Java2D-Zeichen-API (Graphics2D) generieren können. JFreeSVG ist leichtgewichtig, schnell und hat keine anderen Abhängigkeiten als die Java-Laufzeit (11 oder höher).
  • FXLauncher – Launcher für die automatische Aktualisierung für JavaFX-Anwendungen. In Kombination mit der nativen JavaFX-Verpackung erhalten Sie ein natives Installationsprogramm mit automatischen App-Updates.
  • FXParallax – Dieses fügt Steuerelemente hinzu, um Parallax-Effekte hinzuzufügen. Dieser Effekt kann dem Verwendungszweck ein Gefühl von Tiefe (3D-ähnlich) verleihen.
  • FXRibbon – Multifunktionsleistensteuerung für JavaFX basierend auf Microsoft Ribbon.
  • FXTaskbarProgressBar – zum Anzeigen des Fortschritts in der Windows-Taskleiste
  • FXTrayIcon – System TrayIcon-Implementierung für JavaFX, mit der Entwickler native JavaFX-Menüelemente verwenden können und sich nicht um AWT oder Swing kümmern müssen.
  • FXValidation – Validation support für JavaFX.
  • FXyz – ist eine neue JavaFX 3D-Bibliothek, die zusätzliche Grundelemente, zusammengesetzte Objekte, Steuerelemente und Datenvisualisierungen bietet, die es JavaFX 8 nicht gibt.
  • GemsFX – nützliche Steuerelemente wie z.B.: Bildschirmtastatur, Dialog Pane, Resizable Text Area, Expanding Text Area, Time Picker, Duration Picker, Photo View, DrawerStackPane, FilterView, RichTextArea, Payment Option Controls
  • GestureFX – Ein leichtes Pinch-to-Zoom-Fenster für JavaFX.
  • Getdown – ist ein System zum Downloaden von Java-Anwendungen auf Endbenutzercomputern sowie zum Aktualisieren der Anwendungen.
  • GMapFX – GMapsFX bietet einen Wrapper für die Javascript-API von Google Map, mit dem Sie Karten mithilfe einer reinen Java-API verwenden und mit ihnen interagieren können.
  • GraphEditor – Eine Bibliothek zum Erstellen und Bearbeiten von grafischen Diagrammen in JavaFX.
  • Grid – Eine Komponente für gitterbasierte Spiele wie Sudoku oder Schach.
  • Ikonli – Ikonli bietet viele Icon Packs, die in Java-Anwendungen verwendet werden können. Derzeit werden Swing- und JavaFX-UI-Toolkits unterstützt.
  • JavaFX DataViewer – JavaFX-Diagrammbibliothek. Erstellen Sie Diagramme in JavaFX mit der Bibliothek plotly.js.
  • javafx-d3 – bietet eine Java-API für die Verwendung der JavaScript-Bibliothek d3.js mit JavaFx-Anwendungen.
  • JCSG – Java-Implementierung von BSP-basiertem CSG (Constructive Solid Geometry).
  • JFoenix – ist eine Open-Source-Java-Bibliothek, die Google Material Design mithilfe von Java-Komponenten und andere Controls implementiert.
  • JFXAnimation – Builder für CSS-Keyframe-Animationen in JavaFX. Erstelle Animationen wie mit CSS.
  • JFXNodeMapper – Javafx-Knotenzuordnung zu verschiedenen Datenformaten wie CSV, XML, JSON und Ergebnismenge.
  • JFXScad – JavaFX 3D-Druck-IDE basierend auf JCSG.
  • JFXtras – Eine unterstützende Bibliothek für JavaFX, die Hilfsklassen, erweiterte Layouts, Steuerelemente und andere interessante Widgets enthält.
  • JideFX – JideFX Common Layer ist eine Sammlung verschiedener Erweiterungen und Dienstprogramme für die JavaFX-Plattform. Der JideFX Common Layer ist das Äquivalent zum JIDE Common Layer in den JIDE-Komponenten für Swing.
  • JMetro – Modernes Thema (oder Aussehen und Verhalten) für JavaFX, inspiriert von Microsoft Metro / Fluent Design System. Es wird zum Beispiel in der App der NASA verwendet: Deep Space Trajectory Explorer.
  • JSilhouette – JSilhouette bietet zusätzliche Formen für Java-Anwendungen.
  • Kubed – Eine Portierung der beliebten Javascript-Bibliothek D3.js nach Kotlin/JavaFX.
  • Lib-Tile – Lib-Tile ist ein Multi-Maven-Projekt, geschrieben in JavaFX und NetBeans IDE 8.0.2 und bietet die Funktionalitäten, um Tiles in Ihrer JavaFX-Anwendung einfach zu verwenden und zu handhaben.
  • LiveDirsFX – Verzeichnisbaummodell für JavaFX, das das Dateisystem auf Änderungen überwacht.
  • MaterialFX – Eine neue, gut dokumentierte und aktiv entwickelte Bibliothek, die Materialdesign-Komponenten in JavaFX und vieles mehr bringt.
  • Maven jpackage Template – GitHub-Vorlage. Verwenden Sie Maven, jlink und jpackage, um JavaFX-Installationsprogramme für macOS, Windows und Linux über GitHub-Aktionen zu erstellen.
  • Medusa – Eine JavaFX-Bibliothek für Messgeräte. Das Hauptaugenmerk dieses Projekts liegt auf der Bereitstellung von Messgeräten, die auf vielfältige Weise konfiguriert werden können.
  • Metadata-Extractor – ist eine Java-Bibliothek zum Lesen von Metadaten aus Mediendateien.
  • MigPane – MigLayout kann fließende, gitterbasierte, absolute (mit Links), gruppierte und andockbare Layouts erzeugen.
  • NetBeansIDE-AfterburnerFX-Plugin – Das NetBeansIDE-AfterburnerFX-Plugin ist ein NetBeans-IDE-Plugin, das die Dateigenerierung in Übereinstimmung mit der Bibliothek afterburner.fx in einem JavaFX-Projekt unterstützt.
  • OpenHtmlToPDF – Eine HTML-zu-PDF-Bibliothek für die JVM. Basierend auf Flying Saucer und Apache PDF-BOX 2. Mit Unterstützung für SVG-Bilder
  • Orson Charts – Eine interaktive 3D-Diagrammbibliothek für JavaFX und Swing.
  • PI-Rail-FX – Eine Benutzeroberfläche für ein Modelleisenbahn-Steuerungssystem.
  • PreferencesFX – Eine Bibliothek zum einfachen Erstellen einer Benutzeroberfläche für Anwendungseinstellungen / -präferenzen.
  • ReactorFX – ReactorFX integriert Project Reactor und JavaFX, indem es eine einfache API bereitstellt, um reaktiven Flux aus JavaFX-Steuerelementen, Dialogen, Observablen und Sammlungen zu erstellen.
  • ReactFX – Reaktive Ereignisströme, beobachtbare Werte und mehr für JavaFX.
  • redux-javafx-devtool – Ein Entwickler-Tool für ReduxFX. Visualisiert den Status und die Aktionen der App. Ermöglicht Zeitreisen.
  • RichTextFX – Rich-Text-Bereich für JavaFX.
  • RxJavaFX: JavaFX bindings for RxJava – RxJavaFX ist eine einfache API zum Konvertieren von JavaFX-Ereignissen in RxJava Observables und umgekehrt. Es hat auch einen Scheduler, um Emissionen sicher in den JavaFX Event Dispatch Thread zu verschieben.
  • Scenic View – Scenic View ist eine JavaFX-Anwendung, die entwickelt wurde, um den aktuellen Zustand Ihres Anwendungs-Szenengraphen einfach zu verstehen und auch die Eigenschaften des Szenengraphen einfach zu manipulieren, ohne Ihren Code weiter bearbeiten zu müssen. Auf diese Weise können Sie Fehler finden und die Dinge pixelgenau hinbekommen, ohne den Compile-Check-Compile-Tanz machen zu müssen.
  • SmartCSVFX – Eine einfache JavaFX-Anwendung zum Laden, Speichern und Bearbeiten einer CSV-Datei und zum Bereitstellen einer JSON-Konfiguration für Spalten zum Überprüfen der Werte in den Spalten.
  • Stream-Pi – Eine modulare, kostenlose, plattformübergreifende Open-Source-Makro-Pad-Software.
  • SynchronizeFX – Remote Data-Binding zwischen verschiedenen JVMs, sowohl auf einem lokalen Rechner als auch über das Netzwerk.
  • TestFX – Einfaches und sauberes Testen für JavaFX.
  • TestFX-dsl – Java-freundliche DSL zum Definieren von TestFX-Tests.
  • TilesFX – Eine JavaFX-Bibliothek mit Kacheln für Dashboards.
  • TiwulFX – bietet UI-Komponenten: erweiterte TableView mit verschiedenen gebrauchsfertigen Spalten (TextColumn, NumberColumn, LookupColumn usw.), DetachableTabPane, das als Docking-Framework verwendet werden kann, MessageDialog, SideMenu usw.
  • TiwulFX Dock – TiwulFX-Dock bietet ein verbessertes JavaFX TabPane, das das Neuordnen, Trennen und Andocken von Registerkarten unterstützt.
  • TuioFX – Toolkit zum Entwickeln von interaktiven Multi-Touch- und Multi-User-Tabletops und -Oberflächen.
  • Toggle Switch – Toggle Switch-Steuerung für Java (JavaFX).
  • Undecorator – Dekorieren Sie undekorierte JavaFX-Stages mit benutzerdefiniertem Skin. Dieser Helfer verleiht Ihren JavaFX-Stages ein benutzerdefiniertes Aussehen.
  • UndoFX – Undo-Manager für JavaFX, macht die letzte Änderung rückgängig.
  • Update4j – Auto-Updater und Launcher für Ihre verteilten Anwendungen. Entwickelt unter Berücksichtigung des Modulsystems von Java 9.
  • VWorkflows – Interaktive Flow-/Graph-Visualisierung zum Erstellen domänenspezifischer visueller Programmierumgebungen.
  • Webview Debugger – JavaFx WebView-Debugging mit Chrome-Entwicklungstools.
  • WellBehavedFX – Zusammensetzbare Event-Handler und Skin-Gerüste für JavaFX-Steuerelemente.
  • Wordagam – Ein lustiges kleines Wortspiel, das mit openjfx erstellt wurde.

Commercial nicht Frei

  • Gluon Maps – Gluon Maps wurde mit Blick auf hohe Leistung entwickelt. Dies bedeutet jedoch nicht, dass die Funktionalität fehlt.
  • JavaFXPorts – ist das Open Source-Projekt, das Java und JavaFX auf mobile und eingebettete Hardware bringt, einschließlich iPhone, iPad, Android-Geräte und Raspberry Pi.
  • jpro – JavaFX für den Browser. jpro ist eine neue Technologie, die Java zurück in den Browser bringt – ohne Java-Plugin.
  • SyntheticaFX – SyntheticaFX bietet Themen und Komponenten, die hauptsächlich für professionelle Geschäftsanwendungen auf dem Desktop entwickelt wurden. Die Bibliothek wächst, neue Steuerelemente sind im Aufbau und werden in zukünftigen Versionen hinzugefügt. Die Zielplattform der endgültigen Version ist Java 9 oder höher.
Bean Mapping

Frameworks, die das Bean-Mapping vereinfachen.

  • dOOv – Stellt eine fließende API für die Validierung und Zuordnung von typsicheren Domänenmodellen bereit. Es verwendet Anmerkungen, Codegenerierung und eine typsichere DSL, um Bean-Validierung und -Mapping schnell und einfach zu machen.
  • 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

Tools, die den Build-Zyklus und die Abhängigkeiten einer Anwendung handhaben.

  • Apache Maven – Declarative build and dependency management that favors convention over configuration. It might be preferable to Apache Ant, which uses a rather procedural approach and can be difficult to maintain.
  • Bazel – Tool from Google that builds code quickly and reliably.
  • 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

Bibliotheken zum programmatischen Bearbeiten von Bytecode.

  • ASM – All-purpose, low-level bytecode manipulation and analysis.
  • Byte Buddy – Further simplifies bytecode generation with a fluent API.
  • bytecode-viewer – Java 8 Jar & Android APK reverse engineering suite. (GPL-3.0-only)
  • Byteman – Manipulate bytecode at runtime via DSL (rules); mainly for testing/troubleshooting. (LGPL-2.1-or-later)
  • 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.
Caching

Bibliotheken, die Caching-Einrichtungen bereitstellen.

  • cache2k – In-memory high performance caching library.
  • Caffeine – High-performance, near-optimal caching library.
  • Ehcache – Distributed general-purpose cache.
  • Infinispan – Highly concurrent key/value datastore used for caching.
CLI

Bibliotheken für alles rund um die 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 – Reflectionless command line parser.
  • Jexer – Advanced console (and Swing) text user interface (TUI) library, with mouse-draggable windows, built-in terminal window manager, and sixel image support. Looks like Turbo Vision.
  • JLine – Includes features from modern shells like completion or history.
  • JOpt Simple – Fluent parser that uses the POSIX#getopt and GNU#getopt_long syntaxes.
  • picocli – ANSI colors and styles in usage help with annotation-based POSIX/GNU/any syntax, subcommands, strong typing for both options and positional args.
  • 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

Frameworks, die Anwendungen innerhalb eines Clusters dynamisch verwalten können.

  • Apache Aurora – Mesos framework for long-running services and cron jobs.
  • Singularity – Mesos framework that makes deployment and operations easy. It supports web services, background workers, scheduled jobs, and one-off tasks.
Code-Analyse

Tools, die Metriken und Qualitätsmessungen bereitstellen.

  • Checkstyle – Static analysis of coding conventions and standards. (LGPL-2.1-or-later)
  • Error Prone – Catches common programming mistakes as compile-time errors.
  • Infer – Modern static analysis tool for verifying the correctness of code.
  • jQAssistant – Static code analysis with Neo4J-based query language. (GPL-3.0-only)
  • 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)
  • Sourcetrail – Visual source code navigator.
  • Spoon – Library for analyzing and transforming Java source code.
  • Spotbugs – Static analysis of bytecode to find potential bugs. (LGPL-2.1-only)
Code Coverage

Frameworks und Tools, die die Erfassung von Codeabdeckungsmetriken für Testsuiten ermöglichen.

  • Clover – Relies on source-code instrumentation instead of bytecode instrumentation.
  • Cobertura – Relies on offline (or static) bytecode instrumentation and class loading to collect code coverage metrics. (GPL-2.0-only)
  • JaCoCo – Framework that enables collection of code coverage metrics, using both offline and runtime bytecode instrumentation.
Code-Generatoren

Tools, die Muster für sich wiederholenden Code generieren, um Ausführlichkeit und Fehleranfälligkeit zu reduzieren.

  • ADT4J – JSR-269 code generator for algebraic data types.
  • Auto – Generates factory, service, and value classes.
  • Bootify – Browser-based Spring Boot app generation with JPA model and REST API.
  • FreeBuilder – Automatically generates the Builder pattern.
  • Geci – Discovers files that need generated code, updates automatically and writes to the source with a convenient API.
  • Immutables – Annotation processors to generate simple, safe and consistent value objects.
  • 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.
  • JPA Buddy – Plugin for IntelliJ IDEA. Provides visual tools for generating JPA entities, Spring Data JPA repositories, Liquibase changelogs and SQL scripts. Offers automatic Liquibase/Flyway script generation by comparing model to DB, and reverse engineering JPA entities from DB tables.
  • Lombok – Code generator that aims to reduce verbosity.
  • Record-Builder – Companion builder class, withers and templates for Java records.
  • Telosys – Simple and light code generator available as an Eclipse Plugin and also as a CLI.
Compiler-compiler

Frameworks, die helfen, Parser, Interpreter oder Compiler zu erstellen.

  • ANTLR – Complex full-featured framework for top-down parsing.
  • JavaCC – Parser generator that generates top-down parsers. Allows lexical state switching and permits extended BNF specifications.
  • JFlex – Lexical analyzer generator.
Computer Vision

Bibliotheken, die hochwertige Informationen aus Bildern und Videos gewinnen möchten

  • BoofCV – Library for image processing, camera calibration, tracking, SFM, MVS, 3D vision, QR Code and much more.
  • ImageJ – Medical image processing application with an API.
  • JavaCV – Java interface to OpenCV, FFmpeg, and much more.
Configuration

Bibliotheken, die eine externe Konfiguration bereitstellen.

  • 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 supporting Java properties, JSON or its human optimized superset HOCON.
  • Configurate – Configuration library with support for various configuration formats and transformations.
  • dotenv – Twelve-factor configuration library which uses environment-specific files.
  • ini4j – Provides an API for handling Windows‘ INI files.
  • KAConf – Annotation-based configuration system for Java and Kotlin.
  • microconfig – Configuration system designed for microservices which helps to separate configuration from code. The configuration for different services can have common and specific parts and can be dynamically distributed.
  • owner – Reduces boilerplate of properties.
Constraint Satisfaction Problem Solver

Bibliotheken, die bei der Implementierung von Optimierungs- und Erfüllbarkeitsproblemen helfen

  • Choco – Off-the-shelf constraint satisfaction problem solver that uses constraint programming techniques.
  • JaCoP – Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models. (AGPL-3.0)
  • OptaPlanner – Business planning and resource scheduling optimization solver.
CSV

Frameworks und Bibliotheken, die das Lesen/Schreiben von CSV-Daten vereinfachen.

  • FastCSV – Performance-optimized, dependency-free and RFC 4180 compliant.
  • jackson-dataformat-csv – Jackson extension for reading and writing CSV.
  • opencsv – Simple CSV parser.
  • 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.
Daten-Strukturen

Effiziente und spezifische Datenstrukturen.

  • Apache Avro – Data interchange format with dynamic typing, untagged data, and absence of manually assigned IDs.
  • Apache Orc – Fast and efficient columnar storage format for Hadoop-based workloads.
  • Apache Parquet – Columnar storage format based on assembly algorithms from Google’s paper on Dremel.
  • Apache Thrift – Data interchange format that originated at Facebook.
  • 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.
  • RoaringBitmap – Fast and efficient compressed bitmap.
  • SBE – Simple Binary Encoding, one of the fastest message formats around.
  • Tape – Lightning-fast, transactional, file-based FIFO.
  • Wire – Clean, lightweight protocol buffers.
Datenbank

Alles, was Interaktionen mit der Datenbank vereinfacht.

  • Apache Calcite – Dynamic data management framework. It contains many of the pieces that comprise a typical database management system.
  • Apache Drill – Distributed, schema on-the-fly, ANSI SQL query engine for Big Data exploration.
  • Apache Phoenix – High-performance relational database layer over HBase for low-latency applications.
  • ArangoDB – ArangoDB Java driver.
  • Chronicle Map – Efficient, in-memory (opt. persisted to disk), off-heap key-value store.
  • Debezium – Low latency data streaming platform for change data capture.
  • druid – High-performance, column-oriented, distributed data 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.
  • H2 – Small SQL database notable for its in-memory functionality.
  • HikariCP – High-performance JDBC connection pool.
  • JDBI – Convenient abstraction of JDBC.
  • Jedis – Small client for interaction with Redis, with methods for commands.
  • 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).
  • jOOQ – Generates typesafe code based on SQL schema.
  • Leaf – Distributed ID generate service.
  • Liquibase – Database-independent library for tracking, managing and applying database schema changes.
  • MapDB – Embedded database engine that provides concurrent collections backed on disk or in off-heap memory.
  • MariaDB4j – Launcher for MariaDB that requires no installation or external dependencies.
  • Modality – Lightweight ORM with database reverse engineering features.
  • Spring Data JPA MongoDB Expressions – Allows you to use MongoDB query language to query your relational database.
  • Trino – Distributed SQL query engine for big data.
  • QueryStream – Build JPA Criteria queries using a Stream-like API.
  • Querydsl – Typesafe unified queries.
  • Realm – Mobile database to run directly inside phones, tablets or wearables.
  • Redisson – Allows for distributed and scalable data structures on top of a Redis server.
  • 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.
  • Speedment – Database access library that utilizes Java 8’s Stream API for querying.
  • Vibur DBCP – JDBC connection pool library with advanced performance monitoring capabilities.
  • Xodus – Highly concurrent transactional schema-less and ACID-compliant embedded database.
Datum und Uhrzeit

Bibliotheken im Zusammenhang mit der Handhabung von Datum und Uhrzeit.

  • Almanac Converter – Simple conversion between different calendar systems.
  • iCal4j – Parse and build iCalendar RFC 5545 data models.
  • ThreeTen-Extra – Additional date-time classes that complement those in JDK 8.
  • Time4J – Advanced date and time library. (LGPL-2.1-only)
Dependency Injection

Bibliotheken, die helfen, das Paradigma der Inversion of Control zu realisieren.

  • Apache DeltaSpike – CDI extension framework.
  • Dagger – Compile-time injection framework without reflection.
  • 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)
Entwicklung

Erweiterung des Entwicklungsprozesses auf einer grundlegenden Ebene.

  • AspectJ – Seamless aspect-oriented programming extension.
  • DCEVM – JVM modification that allows unlimited redefinition of loaded classes at runtime. (GPL-2.0-only)
  • 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.
  • JavaSymbolSolver – Symbol solver.
  • Manifold – Re-energizes Java with powerful features like type-safe metaprogramming, structural typing and extension methods.
  • NoException – Allows checked exceptions in functional interfaces and converts exceptions to Optional return.
  • SneakyThrow – Ignores checked exceptions without bytecode manipulation. Can also be used inside Java 8 stream operations.
  • Tail – Enable infinite recursion using tail call optimization.
Verteilte Anwendungen

Bibliotheken und Frameworks zum Schreiben verteilter und fehlertoleranter Anwendungen.

  • Apache Geode – In-memory data management system that provides reliable asynchronous event notifications and guaranteed message delivery.
  • Apache Storm – Realtime computation system.
  • Apache ZooKeeper – Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems.
  • Atomix – Fault-tolerant distributed coordination framework.
  • Axon – Framework for creating CQRS applications.
  • Dropwizard Circuit Breaker – Circuit breaker design pattern for Dropwizard. (GPL-2.0-only)
  • Failsafe – Simple failure handling with retries and circuit breakers.
  • Hazelcast – Highly scalable in-memory datagrid with a free open-source version.
  • JGroups – Toolkit for reliable messaging and cluster creation.
  • Quasar – Lightweight threads and actors for the JVM.
  • 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.
Verteilte Transaktionen

Verteilte Transaktionen bieten einen Mechanismus zum Sicherstellen der Konsistenz von Datenaktualisierungen bei gleichzeitigem Zugriff und Teilausfällen.

  • Atomikos – Provides transactions for REST, SOA and microservices with support for JTA and XA.
  • Bitronix – Simple but complete implementation of the JTA 1.1 API.
  • Narayana – Provides support for traditional ACID and compensation transactions, also complies with JTA, JTS and other standards. (LGPL-2.1-only)
  • Seata – Delivers high performance and easy to use distributed transaction services under a microservices architecture.
Verteilung

Tools, die die Verteilung von Anwendungen in nativen Formaten handhaben.

  • Artipie – Binary artifact management toolkit which hosts them on the file system or S3.
  • Boxfuse – Deployment of JVM applications to AWS using the principles of immutable infrastructure.
  • Capsule – Simple and powerful packaging and deployment. A fat JAR on steroids, or a „Docker for Java“ that supports JVM-optimized containers.
  • Central Repository – Largest binary component repository available as a free service to the open-source community. Default used by Apache Maven, and available in all other build tools.
  • Cloudsmith – Fully managed package management SaaS with support for Maven/Gradle/SBT with a free tier.
  • Getdown – A system for deploying Java applications to end-user computers and keeping them up to date. Developed as an alternative to Java Web Start.
  • IzPack – Setup authoring tool for cross-platform deployments.
  • JavaPackager – Maven and Gradle plugin which provides an easy way to package Java applications in native Windows, Mac OS X or GNU/Linux executables, and generate installers for them.
  • jlink.online – Builds optimized runtimes over HTTP.
  • Nexus – Binary management with proxy and caching capabilities.
  • 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.
Dokumentverarbeitung

Bibliotheken, die bei der Verarbeitung von Office-Dokumentformaten helfen.

  • Apache POI – Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT).
  • documents4j – API for document format conversion using third-party converters such as MS Word.
  • docx4j – Create and manipulate Microsoft Open XML files.
  • fastexcel – High performance library to read and write large Excel (XLSX) worksheets.
  • zerocell – Annotation-based API for reading data from Excel sheets into POJOs with focus on reduced overhead.
Finanziell

Bibliotheken mit Bezug zum Finanzbereich.

  • Cassandre – Trading bot framework.
  • Parity – Platform for trading venues.
  • Philadelphia – Low-latency financial information exchange.
  • Square – Integration with the Square API.
  • Stripe – Integration with the Stripe API.
  • ta4j – Library for technical analysis.
Formal Verification

Werkzeuge der formalen Methoden: Beweisassistenten, Modellprüfung, symbolische Ausführung usw.

  • CATG – Concolic unit testing engine. Automatically generates unit tests using formal methods.
  • Checker Framework – Pluggable type systems. Includes nullness types, physical units, immutability types and more. (GPL-2.0-only WITH Classpath-exception-2.0)
  • Daikon – Detects likely program invariants and generates JML specs based on those invariants.
  • Java Path Finder (JPF) – JVM formal verification tool containing a model checker and more. Created by NASA.
  • 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)
  • KeY – Formal software development tool that aims to integrate design, implementation, formal specification, and formal verification of object-oriented software as seamlessly as possible. Uses JML for specification and symbolic execution for verification. (GPL-2.0-or-later)
  • OpenJML – Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers. (GPL-2.0-only)
Funktionale Programmierung

Bibliotheken, die die funktionale Programmierung erleichtern.

  • Cyclops – Monad and stream utilities, comprehensions, pattern matching, functional extensions for all JDK collections, future streams, trampolines and much more.
  • 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.
  • Functional Java – Implements numerous basic and advanced programming abstractions that assist composition-oriented development.
  • 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.
  • Vavr – Functional component library that provides persistent data types and functional control structures.
Spielentwicklung

Frameworks, die die Entwicklung von Spielen unterstützen.

  • FXGL – JavaFX Game Development Framework.
  • JBox2D – Port of the renowned C++ 2D physics engine.
  • jMonkeyEngine – Game engine for modern 3D development.
  • libGDX – All-round cross-platform, high-level framework.
  • Litiengine – AWT-based, lightweight 2D game engine.
  • LWJGL – Robust framework that abstracts libraries like OpenGL/CL/AL.
  • Mini2Dx – Beginner-friendly, master-ready framework for rapidly prototyping and building 2D games.
Geo-Daten

Bibliotheken für die Arbeit mit Geodaten und Algorithmen.

  • Apache SIS – Library for developing geospatial applications.
  • Geo – GeoHash utilities in Java.
  • GeoTools – Library that provides tools for geospatial data. (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.
GUI

Bibliotheken zum Erstellen moderner grafischer Benutzeroberflächen.

  • JavaFX – Successor of Swing.
  • Scene Builder – Visual layout tool for JavaFX applications.
  • SWT – Graphical widget toolkit.
High Performance

Alles über Hochleistungsrechnen, von Sammlungen bis hin zu spezifischen Bibliotheken.

  • 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.
  • fastutil – Fast and compact type-specific collections.
  • HPPC – Primitive collections.
  • JCTools – Concurrency tools currently missing from the JDK.
  • Koloboke – Carefully designed extension of the Java Collections Framework with primitive specializations and more.
HTTP Clients

Bibliotheken, die beim Erstellen von HTTP-Anforderungen und/oder Bindungsantworten helfen.

  • Apache HttpComponents – A toolset of low level Java components focused on HTTP and associated protocols.
  • Async Http Client – Asynchronous HTTP and WebSocket client library.
  • Feign – HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.
  • Google HTTP Client – Pluggable HTTP transport abstraction with support for java.net.HttpURLConnection, Apache HTTP Client, Android, Google App Engine, XML, Gson, Jackson and Protobuf.
  • methanol – HTTP client extensions library.
  • restQL-java – Microservice query language that fetches information from multiple services.
  • Retrofit – Typesafe REST client.
  • 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.
Hypermedia-Typen

Bibliotheken, die die Serialisierung in Hypermedia-Typen handhaben.

  • hate – Builds hypermedia-friendly objects according to HAL specification.
  • JSON-LD – JSON-LD implementation.
  • Siren4J – Library for the Siren specification.
IDE’s

Integrierte Entwicklungsumgebungen, die versuchen, verschiedene Aspekte der Entwicklung zu vereinfachen.

  • Eclipse – Established open-source project with support for lots of plugins and languages.
  • IntelliJ IDEA – Supports many JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector.
  • jGRASP – Created to provide software visualizations that work in conjunction with the debugger such as Control Structure Diagrams, UML class diagrams and Object Viewer.
  • NetBeans – Provides integration for several Java SE and EE features, from database access to HTML5.
  • Recaf – Bytecode editor.
  • Visual Studio Code – Provides Java support for lightweight projects with a simple, modern workflow by using extensions from the internal marketplace.
Bilder

Bibliotheken, die bei der Erstellung, Auswertung oder Bearbeitung von grafischen Bildern helfen.

  • Imgscalr – Simple, efficient and hardware-accelerated image-scaling library implemented in pure Java 2D.
  • 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.
  • ZXing – Multi-format 1D/2D barcode image processing library.
  • image-comparison – 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.
Selbstbeobachtung

Bibliotheken, die dazu beitragen, die Verwendung der Java-Introspektion- und Reflexions-API einfacher und schneller zu machen.

  • 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.
  • Objenesis – Allows dynamic instantiation without default constructor, e.g. constructors which have required arguments, side effects or throw exceptions.
  • 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 Planung

Bibliotheken zum Planen von Hintergrundjobs.

  • JobRunr – Job scheduling library which utilizes lambdas for fire-and-forget, delayed and recurring jobs. Guarantees execution by single scheduler instance using optimistic locking. Has features for persistence, minimal dependencies and is embeddable.
  • 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.
  • easy-batch – Set up batch jobs with simple processing pipelines. Records are read in sequence from a data source, processed in pipeline and written in batches to a data sink.
  • shedlock – Makes sure that your scheduled tasks are executed at most once at the same time. If a task is being executed on one node, it acquires a lock which prevents execution of the same task from another node or thread.
JSON

Bibliotheken zum Serialisieren und Deserialisieren von JSON zu und von Java-Objekten.

  • DSL-JSON – JSON library with advanced compile time databinding.
  • Genson – Powerful and easy-to-use Java-to-JSON conversion library.
  • Gson – Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.
  • 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.
  • Jackson – Similar to GSON, but offers performance gains if you need to instantiate the library more often.
  • 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.
  • Moshi – Modern JSON library, less opinionated and uses built-in types like List and Map.
  • 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.
  • JsonPath – Extract data from JSON using XPATH-like syntax.
  • JsonSurfer – Streaming JsonPath processor dedicated to processing big and complicated JSON data.
JVM und JDK

Aktuelle Implementierungen von JVM/JDK.

  • Adopt Open JDK – Community-driven OpenJDK builds, including both HotSpot and OpenJ9.
  • Avian – JVM with JIT, AOT modes and iOS port.
  • Corretto – No-cost, multiplatform, production-ready distribution of OpenJDK by Amazon. (GPL-2.0-only WITH Classpath-exception-2.0)
  • Dragonwell8 – Downstream version of OpenJDK optimized for online e-commerce, financial, logistics applications.
  • Graal – Polyglot embeddable JVM. (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)
  • 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.
  • 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)
  • SAP Machine – SAP’s no-cost, rigorously tested and JCK-verified OpenJDK friendly fork. (GPL-2.0-only WITH Classpath-exception-2.0)
  • Zulu – OpenJDK builds for Windows, Linux, and macOS. (GPL-2.0-only WITH Classpath-exception-2.0)
Logging

Bibliotheken, die das Verhalten einer Anwendung protokollieren.

  • Apache Log4j 2 – Complete rewrite with a powerful plugin and configuration architecture.
  • Echopraxia – API designed around structured logging, rich context, and conditional logging. There are Logback and Log4J2 implementations, but Echopraxia’s API is completely dependency-free, meaning it can be implemented with any logging API.
  • Graylog – Open-source aggregator suited for extended role and permission management. (GPL-3.0-only)
  • Kibana – Analyzes and visualizes log files. Some features require payment.
  • Logback – Robust logging library with interesting configuration options via Groovy.
  • Logbook – Extensible, open-source library for HTTP request and response logging.
  • Logstash – Tool for managing log files.
  • p6spy – Enables logging for all JDBC transactions without changes to the code.
  • SLF4J – Abstraction layer/simple logging facade.
  • tinylog – Lightweight logging framework with static logger class.
  • OpenTracing Toolbox – Collection of libraries that build on top of OpenTracing and provide extensions and plugins to existing instrumentations.
Machine Learning

Tools, die spezifische statistische Algorithmen zum Lernen aus Daten bereitstellen.

  • Apache Flink – Fast, reliable, large-scale data processing engine.
  • Apache Mahout – Scalable algorithms focused on collaborative filtering, clustering and classification.
  • DatumBox – Provides several algorithms and pre-trained models for natural language processing.
  • Deeplearning4j – Distributed and multi-threaded deep learning library.
  • DJL – High-level and engine-agnostic framework for deep learning.
  • H2O – Analytics engine for statistics over big data.
  • JSAT – Algorithms for pre-processing, classification, regression, and clustering with support for multi-threaded execution. (GPL-3.0-only)
  • m2cgen – CLI tool to transpile models into native code.
  • oj! Algorithms – High-performance mathematics, linear algebra and optimisation needed for data science, machine learning and scientific computing.
  • Oryx 2 – Framework for building real-time, large-scale machine learning applications. Includes end-to-end applications for collaborative filtering, classification, regression, and clustering.
  • Siddhi – Cloud native streaming and complex event processing engine.
  • Smile – Statistical Machine Intelligence and Learning Engine provides a set of machine learning algorithms and a visualization library.
  • Tribuo – Provides tools for classification, regression, clustering, model development and interfaces with other libraries such as scikit-learn, pytorch and TensorFlow.
  • Weka – Collection of algorithms for data mining tasks ranging from pre-processing to visualization. (GPL-3.0-only)
Messaging

Tools, die beim Senden von Nachrichten zwischen Clients helfen, um die Protokollunabhängigkeit sicherzustellen.

  • Aeron – Efficient, reliable, unicast and multicast message transport.
  • Apache ActiveMQ – Message broker that implements JMS and converts synchronous to asynchronous communication.
  • Apache Camel – Glues together different transport APIs via Enterprise Integration Patterns.
  • Apache Kafka – High-throughput distributed messaging system.
  • Apache Pulsar – Distributed pub/sub-messaging system.
  • Apache RocketMQ – Fast, reliable, and scalable distributed messaging platform.
  • Apache Qpid – Apache Qpid makes messaging tools that speak AMQP and support many languages and platforms.
  • EventBus – Simple publish/subscribe event bus.
  • Hermes – Fast and reliable message broker built on top of Kafka.
  • 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

Tools zum Erstellen und Verwalten von Microservices.

  • ActiveRPC – Lightweight and fast library for complex high-load distributed applications and Memcached-like solutions.
  • 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.
  • Helidon – Two-style approach for writing microservices: Functional-reactive and as an implementation of MicroProfile.
  • Micronaut – Modern full-stack framework with focus on modularity, minimal memory footprint and startup time.
  • Nacos – Dynamic service discovery, configuration and service management platform for building cloud native applications.
  • Quarkus – Kubernetes stack tailored for the HotSpot and Graal VM.
  • Sentinel – Flow control component enabling reliability, resilience and monitoring for microservices.
Mobile Development

Tools zum Erstellen oder Verwalten mobilen Anwendungen.

  • Codename One – Cross-platform solution for writing native mobile apps. (GPL-2.0-only WITH Classpath-exception-2.0)
  • MobileUI – Cross-platform framework for developing mobile apps with native UI in Java and Kotlin.
  • Multi-OS Engine – Open-source, cross-platform engine to develop native mobile (iOS, Android, etc.) apps.
Monitoring

Tools, die Anwendungen in der Produktion überwachen.

  • 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.
  • Glowroot – Open-source Java APM.
  • inspectIT – Captures detailed run-time information via hooks that can be changed on the fly. It supports tracing over multiple systems via the OpenTracing API and can correlate the data with end user monitoring.
  • Instrumental – Real-time Java application performance monitoring. A commercial service with free development accounts.
  • JavaMelody – Performance monitoring and profiling.
  • Jaeger client – Jaeger client.
  • jmxtrans – Connect to multiple JVMs and query them for their attributes via JMX. Its query language is based on JSON, which allows non-Java programmers to access the JVM attributes. Supports different output writes, including Graphite, Ganglia, and StatsD.
  • Jolokia – JMX over REST.
  • Metrics – Expose metrics via JMX or HTTP and send them to a database.
  • Datadog – Modern monitoring & analytics.
  • nudge4j – Remote developer console from the browser for Java 8 via bytecode injection.
  • Pinpoint – Open-source APM tool.
  • Prometheus – Provides a multi-dimensional data model, DSL, autonomous server nodes and much more.
  • Sentry – Integration with Sentry, an application error tracking and performance analysis platform.
  • SPM – Performance monitor with distributing transaction tracing for JVM apps.
  • Stagemonitor – Open-source performance monitoring and transaction tracing for JVM apps.
  • Sysmon – Lightweight platform monitoring tool for Java VMs.
  • zipkin – Distributed tracing system which gathers timing data needed to troubleshoot latency problems in microservice architectures.
Native

Für die Arbeit mit plattformspezifischen nativen Bibliotheken.

  • Aparapi – Converts bytecode to OpenCL which allows execution on GPUs.
  • JavaCPP – Provides efficient and easy access to native C++.
  • JNA – Work with native libraries without writing JNI. Also provides interfaces to common system libraries.
  • JNR – Work with native libraries without writing JNI. Also provides interfaces to common system libraries. Same goals as JNA, but faster, and serves as the basis for the upcoming Project Panama.
Verarbeitung natürlicher Sprache

Bibliotheken, die sich auf die Verarbeitung von Text spezialisiert haben.

  • CogCompNLP – Stellt gängige Annotatoren für die einfache Texteingabe bereit. (Lizenz für Forschungs- und akademische Nutzung)
  • CoreNLP – Bietet eine Reihe grundlegender Tools für Aufgaben wie Tagging, Erkennung benannter Entitäten und Stimmungsanalyse. (GPL-3.0 oder höher)
  • DKPro – Sammlung wiederverwendbarer NLP-Tools für sprachliche Vorverarbeitung, maschinelles Lernen, lexikalische Ressourcen usw.
  • LingPipe – Toolkit für Aufgaben vom POS-Tagging bis zur Stimmungsanalyse.
Networking

Bibliotheken zum Aufbau von Netzwerkservern.

  • Commons-networking – Client for server-sent events (SSE).
  • Comsat – Integrates standard Java web-related APIs with Quasar fibers and actors.
  • Dubbo – High-performance RPC framework.
  • Grizzly – NIO framework. Used as a network layer in Glassfish.
  • gRPC – RPC framework based on protobuf and HTTP/2.
  • KryoNet – Provides a clean and simple API for efficient TCP and UDP client/server network communication using NIO and Kryo.
  • MINA – Abstract, event-driven async I/O API for network operations over TCP/IP and UDP/IP via Java NIO.
  • Netty – Framework for building high-performance network applications.
  • Drift – Easy-to-use, annotation-based library for creating Thrift clients and serializable types.
  • ServiceTalk – Framework built on Netty with APIs tailored to specific protocols and support for multiple programming paradigms.
  • sshj – Programmatically use SSH, SCP or SFTP.
  • TLS Channel – Implements a ByteChannel interface over SSLEngine, enabling easy-to-use (socket-like) TLS.
  • Undertow – Web server providing both blocking and non-blocking APIs based on NIO. Used as a network layer in WildFly. (LGPL-2.1-only)
  • urnlib – Represent, parse and encode URNs, as in RFC 2141. (GPL-3.0-only)
ORM

APIs, die die Persistenz von Objekten handhaben.

  • Apache Cayenne – Provides a clean, static API for data access. Also includes a GUI Modeler for working with database mappings, and DB reverse engineering and generation.
  • Doma – 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.
  • Ebean – Provides simple and fast data access.
  • EclipseLink – Supports a number of persistence standards: JPA, JAXB, JCA and SDO.
  • Hibernate – Robust and widely used, with an active community. (LGPL-2.1-only)
  • MyBatis – Couples objects with stored procedures or SQL statements.
  • ObjectiveSql – ActiveRecord ORM for rapid development and convention over configuration.
  • Permazen – Language-natural persistence layer.
  • SimpleFlatMapper – Simple database and CSV mapper.
PaaS

Java-Plattform als Dienst.

PDF

Tools zur Unterstützung von PDF-Dateien.

  • Apache FOP – Creates PDFs from XSL-FO.
  • Apache PDFBox – Toolbox for creating and manipulating PDFs.
  • Dynamic Jasper – Abstraction layer to JasperReports. (LGPL-3.0-only)
  • DynamicReports – Simplifies JasperReports. (LGPL-3.0-only)
  • Eclipse BIRT – Report engine for creating PDF and other formats (DOCX, XLSX, HTML, etc) using Eclipse-based visual editor.
  • flyingsaucer – XML/XHTML and CSS 2.1 renderer. (LGPL-2.1-or-later)
  • iText (nicht Frei) – Creates PDF files programmatically.
  • JasperReports – Complex reporting engine. (LGPL-3.0-only)
  • Open HTML to PDF – Properly supports modern PDF standards based on flyingsaucer and Apache PDFBox.
  • OpenPDF – Open-source iText fork. (LGPL-3.0-only & MPL-2.0)
  • Tabula – Extracts tables from PDF files.
Performance analysis

Tools für Leistungsanalyse, Profilerstellung und Benchmarking.

  • fastThread (nicht Frei) – Analyze and visualize thread dumps with a free cloud-based upload interface.
  • GCeasy (nicht Frei) – Tool to analyze and visualize GC logs. It provides a free cloud-based upload interface.
  • honest-profiler – Low-overhead, bias-free sampling profiler.
  • jHiccup – Logs and records platform JVM stalls.
  • JITWatch – Analyze the JIT compiler optimisations made by the HotSpot JVM.
  • 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)
  • LatencyUtils – Utilities for latency measurement and reporting.
Platform

Frameworks, die Suiten mehrerer Bibliotheken sind, die mehrere Kategorien umfassen

Apache Commons
  • BCEL – Byte Code Engineering Library – analyze, create, and manipulate Java class files.
  • BeanUtils – Easy-to-use wrappers around the Java reflection and introspection APIs.
  • BeanUtils2 – Redesign of Commons BeanUtils.
  • BSF – Bean Scripting Framework – interface to scripting languages, including JSR-223.
  • Chain – Chain of Responsibility pattern implementation.
  • ClassScan – Find Class interfaces, methods, fields, and annotations without loading.
  • CLI – Command-line arguments parser.
  • CLI2 – Redesign of Commons CLI.
  • Codec – General encoding/decoding algorithms, e.g. phonetic, base64 or URL.
  • Collections – Extends or augments the Java Collections Framework.
  • Compress – Defines an API for working with tar, zip and bzip2 files.
  • Configuration – Reading of configuration/preferences files in various formats.
  • Convert – Commons-Convert aims to provide a single library dedicated to the task of converting an object of one type to another.
  • CSV – Component for reading and writing comma separated value files.
  • Daemon – Alternative invocation mechanism for unix-daemon-like java code.
  • DBCP – Database connection pooling services.
  • DbUtils – JDBC helper library.
  • Digester – XML-to-Java-object mapping utility.
  • Email – Library for sending e-mail from Java.
  • Exec – API for dealing with external process execution and environment management in Java.
  • FileUpload – File upload capability for your servlets and web applications.
  • Finder – Java library inspired by the UNIX find command.
  • Flatfile – Java library for working with flat data structures.
  • Functor – Function that can be manipulated as an object, or an object representing a single, generic function.
  • Graph – General purpose graph APIs and algorithms.
  • I18n – Adds the feature of localized message bundles that consist of one or many localized texts that belong together.
  • Id – Id is a component used to generate identifiers.
  • Imaging – Image library.
  • IO – Collection of I/O utilities.
  • Javaflow – Continuation implementation to capture the state of the application.
  • JCI – Java Compiler Interface.
  • JCS – Java Caching System.
  • Jelly – XML based scripting and processing engine.
  • Jexl – Expression language which extends the Expression Language of the JSTL.
  • JNet – JNet allows to use dynamically register url stream handlers through the java.net API.
  • JXPath – Utilities for manipulating Java Beans using the XPath syntax.
  • Lang – Provides extra functionality for classes in java.lang.
  • Logging – Wrapper around a variety of logging API implementations.
  • Math – Lightweight, self-contained mathematics and statistics components.
  • Monitoring – Monitoring aims to provide a simple but extensible monitoring solution for Java applications.
  • Nabla – Nabla provides automatic differentiation classes that can generate derivative of any function implemented in the Java language.
  • Net – Collection of network utilities and protocol implementations.
  • OGNL – Object-graph navigation language.
  • OpenPGP – Interface to signing and verifying data using OpenPGP.
  • Performance – Small framework for microbenchmark clients, with implementations for Commons DBCP and Pool.
  • Pipeline – Provides a set of pipeline utilities designed around work queues that run in parallel to sequentially process data objects.
  • Pool – Generic object pooling component.
  • Proxy – Library for creating dynamic proxies.
  • RDF – Common implementation of RDF 1.1 that could be implemented by systems on the JVM.
  • RNG – Commons Rng provides implementations of pseudo-random numbers generators.
  • SCXML – Implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.
  • Validator – Framework to define validators and validation rules in an xml file.
  • VFS – Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.
  • Weaver – Provides an easy way to enhance (weave) compiled bytecode.
Other
  • CUBA Platform – High-level framework for developing enterprise applications with a rich web interface, based on Spring, EclipseLink and Vaadin.
  • Light-4J – Fast, lightweight and productive microservices framework with built-in security.
  • Orienteer – Open-source business application platform for rapid configuration/development of CRM, ERP, LMS and other applications.
  • Spring – Provides many packages for dependency injection, aspect-oriented programming, security, etc.
Prozesse

Bibliotheken, die bei der Verwaltung von Betriebssystemprozessen helfen.

  • ch.vorburger.exec – Convenient API around Apache Commons Exec.
  • zt-exec – Provides a unified API to Apache Commons Exec and ProcessBuilder.
  • zt-process-killer – Stops processes started from Java or the system processes via PID.

Sonstiges

Alles andere.

  • 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.
  • JBake – Static website generator.
  • 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.
  • JObfuscator – Source code obfuscator.
  • Joda-Money – Basic currency and money classes and algorithms not provided by the JDK.
  • JPad – Snippet runner.
  • jsweet – Source transpiler to TypeScript/JavaScript.
  • 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.
  • OpenRefine – Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases.
  • 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.
  • RR4J – RR4J is a tool that records java bytecode execution and later allows developers to replay locally.
  • Simple Java Mail – Mailing with a clean and fluent API.
  • Smooks – Framework for fragment-based message processing. (Apache-2.0 OR LGPL-3.0-or-later)
  • Togglz – Implementation of the Feature Toggles pattern.
  • TypeTools – Tools for resolving generic types.
  • XMLBeam – Processes XML by using annotations or XPath within code.
  • yGuard – Obfuscation via renaming and shrinking.
Reactive libraries

Bibliotheken für die Entwicklung reaktiver Anwendungen.

  • Akka – Toolkit and runtime for building concurrent, distributed, fault-tolerant and event-driven applications.
  • Reactive Streams – Provides a standard for asynchronous stream processing with non-blocking backpressure.
  • Reactor – Library for building reactive fast-data applications.
  • RxJava – Allows for composing asynchronous and event-based programs using observable sequences.
  • vert.x – Polyglot event-driven application framework.
REST Frameworks

Frameworks speziell zum Erstellen von RESTful-Services.

  • Dropwizard – Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics.
  • Elide – Opinionated framework for JSON- or GraphQL-APIs based on a JPA data model.
  • Jersey – JAX-RS reference implementation.
  • Microserver – Convenient, extensible microservices plugin system for Spring & Spring Boot. With more than 30 plugins and growing, it supports both micro-monolith and pure microservices styles.
  • Rapidoid – Simple, secure and extremely fast framework consisting of an embedded HTTP server, GUI components and dependency injection.
  • rest.li – Framework for building robust, scalable RESTful architectures using typesafe bindings and asynchronous, non-blocking IO with an end-to-end developer workflow that promotes clean practices, uniform interface design and consistent data modeling.
  • RESTEasy – Fully certified and portable implementation of the JAX-RS specification.
  • RestExpress – Thin wrapper on the JBoss Netty HTTP stack that provides scaling and performance.
  • Restlet Framework – Pioneering framework with powerful routing and filtering capabilities, and a unified client and server API.
  • Spark – Sinatra inspired framework.
  • 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.
  • springdoc-openapi – Automates the generation of API documentation using Spring Boot projects.
  • Swagger – Standard, language-agnostic interface to REST APIs.
Wissenschaft

Bibliotheken für wissenschaftliches Rechnen, Analyse und Visualisierung.

  • BioJava – Facilitates processing biological data by providing algorithms, file format parsers, sequencing and 3D visualization commonly used in bioinformatics.
  • Chart-FX – Scientific charting library with focus on performance optimised real-time data visualisation at 25 Hz update rates for large data sets.
  • DataMelt – Environment for scientific computation, data analysis and data visualization. (GPL-3.0-or-later)
  • Erdos – Modular, light and easy graph framework for theoretic algorithms.
  • GraphStream – Library for modeling and analyzing dynamic graphs.
  • JFreeChart – 2D chart library for Swing, JavaFX and server-side applications. (LGPL-2.1-only)
  • JGraphT – Graph library that provides mathematical graph-theory objects and algorithms.
  • JGraphX – Library for visualizing (mainly Swing) and interacting with node-edge graphs.
  • LogicNG – Library for creating, manipulating and solving Boolean and Pseudo-Boolean formulas.
  • Mines Java Toolkit – Library for geophysical scientific computation, visualization and digital signal analysis.
  • 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.
  • Orson-Charts – Generates a wide variety of 3D charts that can be displayed with Swing and JavaFX or exported to PDF, SVG, PNG and JPEG. (GPL-3.0-only)
  • Tablesaw – Includes a data-frame, an embedded column store, and hundreds of methods to transform, summarize, or filter data.
  • XChart – Light-weight library for plotting data. Many customizable chart types are available.
Suche

Engines, die Dokumente für die Suche und Analyse indizieren.

  • Apache Lucene – High-performance, full-featured, cross-platform, text search engine library.
  • Apache Solr – Enterprise search engine optimized for high-volume traffic.
  • Elasticsearch – Distributed, multitenant-capable, full-text search engine with a RESTful web interface and schema-free JSON documents.
  • Indexer4j – Simple and light full text indexing and searching library.
Security

Bibliotheken, die Sicherheit, Authentifizierung, Autorisierung oder Sitzungsverwaltung handhaben.

  • Apache Shiro – Performs authentication, authorization, cryptography and session management.
  • Bouncy Castle – All-purpose cryptographic library and JCA provider offering a wide range of functions, from basic helpers to PGP/SMIME operations.
  • Cryptomator – Multiplatform, transparent, client-side encryption of files in the cloud. (GPL-3.0-only)
  • Hdiv – Runtime application that repels application security risks included in the OWASP Top 10, including SQL injection, cross-site scripting, cross-site request forgery, data tampering, and brute force attacks.
  • jjwt – JSON web token for Java and Android.
  • jwt-java – Easily create and parse JSON Web Tokens and create customized JWT validators using a fluent API.
  • Jwks RSA – JSON Web Key Set parser.
  • Kalium – Binding for the Networking and Cryptography (NaCl) library.
  • Keycloak – Integrated SSO and IDM for browser apps and RESTful web services.
  • Keywhiz – System for distributing and managing secrets.
  • Nbvcxz – Advanced password strength estimation.
  • OACC – Provides permission-based authorization services.
  • OTP-Java – One-time password generator library according to RFC 4226 (HOTP) and RFC 6238 (TOTP).
  • pac4j – Security engine.
  • Password4j – User-friendly cryptographic library that supports Argon2, Bcrypt, Scrypt, PBKDF2 and various other cryptographic hash functions.
  • SecurityBuilder – Fluent Builder API for JCA and JSSE classes and especially X.509 certificates.
  • SSLContext-Kickstart – High-level SSL context builder for configuring HTTP clients with SSL/TLS.
  • 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.
  • Tink – Provides a simple and misuse-proof API for common cryptographic tasks.

Serialisierung

Bibliotheken, die die Serialisierung mit hoher Effizienz handhaben.

  • FlatBuffers – Memory-efficient serialization library that can access serialized data without unpacking and parsing it.
  • FST – JDK-compatible, high-performance object graph serialization.
  • Kryo – Fast and efficient object graph serialization framework.
  • MessagePack – Efficient binary serialization format.
  • PHP Serializer – Serializing objects in the PHP serialization format.
Server

Server, die speziell zum Bereitstellen von Anwendungen verwendet werden.

  • Apache Tomcat – Robust, all-round server for Servlet and JSP.
  • Apache TomEE – Tomcat plus Java EE.
  • Jetty – Provides a Web server and javax.servlet container, plus support for HTTP/2, WebSocket, OSGi, JMX, JNDI, JAAS and many other integrations.
  • nanohttpd – Tiny, easily embeddable HTTP server.
  • WildFly – Formerly known as JBoss and developed by Red Hat with extensive Java EE support. (LGPL-2.1-only)
Template Engine

Werkzeuge, die Ausdrücke in einer Vorlage ersetzen.

  • Freemarker – Library to generate text output (HTML web pages, e-mails, configuration files, source code, etc.) based on templates and changing data.
  • Handlebars.java – Logicless and semantic Mustache templates.
  • Jade4J – Implementation of Pug (formerly known as Jade).
  • Jamal – Extendable template engine embedded into Maven/JavaDoc, supporting multiple extensions (Groovy, Ruby, JavaScript, JShell, PlantUml) with support for snippet handling.
  • jte – Compiles to classes, and uses an easy syntax, several features to make development easier and provides fast execution and a small footprint.
  • Jtwig – Modular, configurable and fully tested template engine.
  • Pebble – Inspired by Twig and separates itself with its inheritance feature and its easy-to-read syntax. It ships with built-in autoescaping for security and it includes integrated support for internationalization.
  • Rocker – Optimized, memory efficient and speedy template engine producing statically typed, plain objects.
  • StringTemplate – Template engine for generating source code, web pages, emails, or any other formatted text output.
  • Thymeleaf – Aims to be a substitute for JSP and works for XML files.