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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 classes and libraries
  • compiles straight to Java bytecode so you can use it anywhere you can use Java

Learn all about Groovy at the GR8Conf conference

GR8Conf Europe 2011 is the third edition of the popular conference dedicated to the whole Groovy ecosystem. It will take place in Copenhagen, Denmark, on May 17th-19th 2011.

The conference features three days packed with Groovy, Grails, Griffon, Gradle, Spock, GPars, Gaelyk, AST transformations, GContracts, Grails Plugins development, and lots of other "gr8" stuff. A university day will start the conference with kickstart workshops on Groovy and Grails, and continue with advanced hands-on workshops on Groovy AST Transformations and Grails plugin development. The next two days of the conference will feature updates on the latest developments of the various Groovy ecosystem projects, as well as case studies from real-life projects in the enterprise, and the famous Hackergarten hackathon.

Register quickly before all the seats are taken!


For those in or near the US, be sure to check out GR8 in the US in Minneapolis, MN, on June 27th and 28th. In its second year, the conference features two days of hands on workshops and great presentations by experts in Groovy, Grails, Griffon and other GR8 technologies. Register now!

Experience the latest Groovy 1.8

Groovy 1.8, the latest major and stable version of the popular dynamic language for the JVM, has been released. To learn more about the novelties, make sure to read the release notes. In a nutshell, Groovy 1.8 provides new Domain-Specific Language authoring capabilities for more readability and expressivity of your business rules, runtime performance improvements, the bundling of the GPars parallel and concurrency library, built-in JSON support, new compile-time meta-programming features (several new useful AST transformations), new functional programming aspects for closures, and much more.

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:

def name='World'; println "Hello $name!"



A more sophisticated version using Object Orientation:

class Greet {
  def name
  Greet(who) { name = who[0].toUpperCase() +
                      who[1..-1] }
  def salute() { println "Hello $name!" }
}

g = new Greet('world')  // create object
g.salute()              // Output "Hello World!"



Leveraging existing Java libraries:

import static org.apache.commons.lang.WordUtils.*

class Greeter extends Greet {
  Greeter(who) { name = capitalize(who) }
}

new Greeter('world').salute()



On the command line:

groovy -e "println 'Hello ' + args[0]" World





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 Scriptingscript Windows ActiveX and COM components with Groovy
  • Gant
  • GFreeMarkeran integration of the FreeMarker template engine for Groovy
  • Google Data Supportmakes using the Google Data APIs easier from within Groovy
  • Grama simple xdoclet-like tool for processing doclet tags or Java 5 annotations
  • GraphicsBuilderGraphicsBuilder is a Groovy builder for Java 2D
  • Grapplet
  • GriffonDekstop Enhancements for Groovy
  • GrooshProvides a shell-like capability for handling external processes.
  • Groovy Jabber-RPCallows you to make XML-RPC calls using the Jabber protocol
  • GroovyJMS
  • GroovyLabProvides a domain specific language (DSL) for math engineering (matlab-like syntax).
  • Groovy Monkeyis a dynamic scripting tool for the Eclipse Platform
  • GroovyRestletGroovy DSL for constructing Restlet application
  • Groovy Science
  • Groovy SOAPcreate a SOAP server and make calls to remote SOAP servers using Groovy
  • GroovySWTa wrapper around SWT, the eclipse Standard Widget Toolkit
  • GroovyWSGroovySOAP replacement that uses CXF and Java5 features
  • GSPmeans GroovyServer Pages, which is similar to JSP (JavaServer Pages)
  • GSQLsupports easier access to databases using Groovy
  • HTTP Builderprovides a convenient builder API for complex HTTP requests
  • JideBuilderJideBuilder is a Groovy builder for the open source JIDE Common Layer http://jide-oss.dev.java.net
  • MetaBuilderMetaBuilder is a builder that builds builders.
  • Native Launchera native program for launching groovy scripts
  • Proxy-o-MaticProxy-o-Matic lets you create dynamic proxies fast and in an homogeneous way
  • Windows NSIS-Installera Windows-specific installer for Groovy
  • Windows Servicesframework for Groovy-based WinNT (Windows) Services
  • WingSBuilderWingsBuilder is a Groovy builder for the wingS Framework http://wingsframework.org
  • XMLRPCallows you to create a local XML-RPC server and/or to make calls on remote XML-RPC servers
  • GroovyFXGroovyFX provides a Groovy binding for JavaFX 2.0.
  • GaelykGaelyk is a lightweight Groovy toolkit for developing and deploying Groovy applications on Google App Engine.
  • GMaven
  • Groovy TransformsProvides additional AST Transformations http://groovy.codehaus.org/Compile-time+Metaprogramming+-+AST+Transformations

  • Grailsa Groovy-based web framework inspired by Ruby on Rails
  • GORMthe Grails Object-Relational Mapping persistence framework
  • Griffona Groovy-based desktop framework inspired by Grails
  • GroovyPluginA Groovy plugin for JSPWiki
  • OCM GroovyA Object Content Mapping implemented in Groovy leveraging the Java Content Repository (JCR)
  • TelluriumA test framework built on top of the Selenium test framework implemented in Groovy
  • GradleThe next generation build system
  • GParsA Groovy concurrency/parallelism library
  • CodeNarcStatic analysis for defects, bad practices, inconsistencies and style issues in Groovy code.
  • GroovyServGroovyServ 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:

The Groovy development team is happy to announce the joint releases of the Groovy 2.4.1 and Groovy 2.3.10 of the Groovy programming language for the Java platform.

Both releases are bug fix releases, and while Groovy 2.4.1 is the latest official stable branch, we thought it might be helpful to some projects who are still on the 2.3.x line to get a final release for that branch. But going forward, the 2.3.x branch won’t see any upcoming release.

You can learn more about all the tickets closed by reading:

For reference, you can also read the release notes of Groovy 2.4 if you haven't had a chance to since the announcement.

Head over to the download section of the new Groovy website to download the binary distribution, or update your dependencies accordingly with those new version numbers.

Thanks a lot for all those who contributed to this release!


Groovy 2.4 released

The Groovy team is happy to announce the release of Groovy 2.4.0!

The big highlight of this release is the Android support, which allows developers to write Android applications fully using Groovy, with much less boilerplate code than raw Java.
The team also focused on various improvements in terms of performance, smaller bytecode generation, or memory consumption.
Other interesting aspects worth noticing in this release are:
  • traits can use the @SelfType annotation with static type checking enabled to restrict to what classes traits can be applied
  • GDK methods improvements
  • some refinements to existing AST transformations
  • further Groovysh improvements as well.
Please have a look at the full release notes for Groovy 2.4 to know more about the new features and all the interesting tickets closed.
You can have a look at the 2.4 changelog on the new Groovy website too.
And then, just go grab this release while it's hot!
Thanks a lot to all those who contributed to this release, whether through bug reports, but also with documentation or code contributions through pull requests. All your help is warmly welcome!
Your support of Groovy and its ecosystem is what makes Groovy so strong, and what will allow it to continue making us all more productive for the next decade!
Keep on groovy'ing!




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