Groovy...

is an agile and dynamic language for the Java Virtual Machine
builds upon the strengths of Java but has additional power features inspired by languages like Python, Ruby and Smalltalk
makes modern programming features available to Java developers with almost-zero learning curve
supports Domain-Specific Languages and other compact syntax so your code becomes easy to read and maintain
makes writing shell and build scripts easy with its powerful processing primitives, OO abilities and an Ant DSL
increases developer productivity by reducing scaffolding code when developing web, GUI, database or console applications
simplifies testing by supporting unit testing and mocking out-of-the-box
seamlessly integrates with all existing Java objects and libraries
compiles straight to Java bytecode so you can use it anywhere you can use Java

Learn all about Groovy, Grails and Griffon at the 2GX Conference

2GX Conference is a conference dedicated to Groovy, Grails and Griffon*, co-hosted along with the SpringOne conference, where experts and makers of these technologies will guide attendees through lectures around those technologies.

Experience the latest Groovy 1.6

Groovy 1.6, the latest major and stable version of the popular dynamic language for the JVM, has been released. In a nutshell, it brings great compile-time and runtime performance improvements, multiple assignments, optional return in if/else and try/catch blocks, Compile-time Metaprogramming - AST Transformations and all the provided transformation annotations like @Singleton, @Lazy, @Immutable, @Delegate and friends, the Grapes and grab() and its @Grab annotation, various Swing builder and Swing console improvements, the integration of Groovy JmxBuilder, JSR-223 scripting engine built-in, and various metaprogramming improvements, like the ExpandoMetaClass DSL, per-instance metaclasses even for POJOS and runtime mixins.

Groovy, an award-winning creative and innovative project

JAX is the most important Java conference in Germany. Every year, the organizers are running a contest to select the most innovative and creative projects. From over 40 proposals, the jury selected only ten nominees. Although great projects were selected, like the Matisse GUI builder in NetBeans, or the Nuxeo Enterprise Content Management solution, Groovy won the first prize! It is a great honor and a huge pleasure for us to receive such a prize, especially knowing the cool projects we were competing with, or the past winners like the Spring framework.
Dierk König, author of the best-selling "Groovy in Action" book, received the prize in the name of the Groovy community, after having presented several sessions on Groovy at this conference. This award proves and reaffirms how innovative, creative and influential the Groovy project is for the Java community.

"Groovy is like a super version of Java. It can leverage Java's enterprise capabilities but also has cool productivity features like closures, builders and dynamic typing. If you are a developer, tester or script guru, you have to love Groovy."

Samples

A simple hello world script:

A more sophisticated version using Object Orientation:

Leveraging existing Java libraries:

On the command line:

Documentation [more]

Getting Started Guide
How to install and begin using Groovy as well as introductory tutorials.

User Guide
Provides information about using the Groovy language including language facilities, libraries and programming guidelines.

Cookbook Examples
Illustrates larger examples of using Groovy in the Wild with a focus on applications or tasks rather than just showing off the features, APIs or modules.

Developer Guide
Contains information mainly of interest to the developers involved in creating Groovy and its supporting modules and tools.

Testing Guide
Contains information of relevance to those writing developer tests or systems and acceptance tests.

Advanced Usage Guide
Covers topics which you don't need to worry about initially when using Groovy but may want to dive into to as you strive for Guru status.

Modules [more]

The following modules and contributions are currently available:

COM Scripting — script Windows ActiveX and COM components with Groovy
Gant
GFreeMarker — an integration of the FreeMarker template engine for Groovy
Google Data Support — makes using the Google Data APIs easier from within Groovy
Gram — a simple xdoclet-like tool for processing doclet tags or Java 5 annotations
GraphicsBuilder — GraphicsBuilder is a Groovy builder for Java 2D
Grapplet
Griffon — Dekstop Enhancements for Groovy
Groosh — Provides a shell-like capability for handling external processes.
Groovy Jabber-RPC — allows you to make XML-RPC calls using the Jabber protocol
GroovyJMS
GroovyLab — Provides a domain specific language (DSL) for math engineering (matlab-like syntax).
Groovy Monkey — is a dynamic scripting tool for the Eclipse Platform
GroovyRestlet — Groovy DSL for constructing Restlet application
Groovy Science
Groovy SOAP — create a SOAP server and make calls to remote SOAP servers using Groovy
GroovySWT — a wrapper around SWT, the eclipse Standard Widget Toolkit
GroovyWS — GroovySOAP replacement that uses CXF and Java5 features
GSP — means GroovyServer Pages, which is similar to JSP (JavaServer Pages)
GSQL — supports easier access to databases using Groovy
HTTP Builder — provides a convenient builder API for complex HTTP requests
JideBuilder — JideBuilder is a Groovy builder for the open source JIDE Common Layer
MetaBuilder — MetaBuilder is a builder that builds builders.
Native Launcher — a native program for launching groovy scripts
Proxy-o-Matic — Proxy-o-Matic lets you create dynamic proxies fast and in an homogeneous way
Windows NSIS-Installer — a Windows-specific installer for Groovy
Windows Services — framework for Groovy-based WinNT (Windows) Services
WingSBuilder — WingsBuilder is a Groovy builder for the wingS Framework
XMLRPC — allows you to create a local XML-RPC server and/or to make calls on remote XML-RPC servers
GroovyFX — GroovyFX provides a Groovy binding for JavaFX 2.0.
Gaelyk — Gaelyk is a lightweight Groovy toolkit for developing and deploying Groovy applications on Google App Engine.
GMaven
Groovy Transforms — Provides additional AST Transformations

Grails — a Groovy-based web framework inspired by Ruby on Rails
GORM — the Grails Object-Relational Mapping persistence framework
Griffon — a Groovy-based desktop framework inspired by Grails
GroovyPlugin — A Groovy plugin for JSPWiki
OCM Groovy — A Object Content Mapping implemented in Groovy leveraging the Java Content Repository (JCR)
Tellurium — A test framework built on top of the Selenium test framework implemented in Groovy
Gradle — The next generation build system
GPars — A Groovy concurrency/parallelism library
CodeNarc — Static analysis for defects, bad practices, inconsistencies and style issues in Groovy code.
GroovyServ — GroovyServ makes Groovy’s startup time much faster, by pre-invoking Groovy as a server.
GBench — The benchmarking module for Groovy
GProf — The profiling module for Groovy

Enjoy making your code groovier !!!!

Latest news

If you wish to stay up-to-date with our vibrant community, you can learn more about:

And below, you will find the latest announcements:

Groovy 2.1.5 bug fix release

Dear all,

I'm pleased to announce the release of Groovy 2.1.5.

Groovy 2.1.5 is a bug fix release of the Groovy 2.1 branch. In particular, it fixes a problem we've encountered with Groovy 2.1.4 where the extension module descriptors were not found in the "all" JAR, which meant that the usual nice GDK methods extensions for XML and other modules were not found by Groovy.

You can download Groovy 2.1.5 in the download area and have a look at the JIRA release notes.

Thanks to all who contributed to this release!

Keep on groovy'ing!

Groovy 2.1.4 released

The Groovy development team is pleased to announce the release of Groovy 2.1.4.

Groovy 2.1.4 is essentially a bug fix release of our 2.1 branch, and you can dive into the details in our JIRA release notes.

You can get the distribution in our download area.

Thanks a lot to all those who contributed to this release, and we're looking forward to hearing your feedback!

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