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Groovy is ...

...

An agile dynamic language for the Java Platform with many features that are inspired by languages like Python, Ruby and Smalltalk, making them available to Java developers using a Java-like syntax.
Developing web applications , writing shell scripts easily, writing concise, meaningful, test cases using Groovy's JUnit integration, or prototyping and producing real industrial strength applications have never been so concise and groovy.

Groovy works cleanly with all existing Java objects and libraries and compiles straight to Java bytecode in either application development or scripting mode.

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h3. 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*
* provides the ability to *statically type check* and *statically compile* your code for robustness and performance
* 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
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Experience Groovy 2.3

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Groovy 2.3 is the latest major and stable version of the popular alternative language for the JVM.

In this new release, Groovy features:

  • official support for running Groovy on JDK 8
  • traits, as a new object oriented way of composing behavior in your classes
  • new and improved AST transformations like @TailRecursive, @Builder and @Sortable
  • a new NIO2 module with Path support
  • lightening fast JSON parsing and building
  • closure parameter type inference
  • a new markup template engine
  • Groovysh and GroovyConsole ease of use improvements
  • a new GroovyAssert test utility
  • more @BaseScript class capabilities, and more.
Info
titleDeprecating the wiki

We are slowly migrating documentation from the wiki to a new website. It is recommanded that you read the new documentation first, and fall back to the wiki if you can't find what you were looking for.

 

 

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"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."

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Samples

A simple hello world script:

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

A more sophisticated version using Object Orientation:

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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
output "Hello World!"

Leveraging existing Java libraries:

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

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

new Greeter('world').salute()

On the command line:

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

Documentation [more]

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User Guide [more]

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pageGROOVY:User Guide

Advanced Topics [more]

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pageGROOVY:Advanced Topics
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Getting Started Guide [more]

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pageGROOVY:Getting Started Guide

Testing Guide [more]

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pageGROOVY:Testing Guide

Developer Guide [more]

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pageGROOVY:Developer Guide

Cookbook Examples [more]

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pageGROOVY:Cookbook Examples

Modules [more]

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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:

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Partners

Get automatic notifications about Groovy versionsImage Added

Bintray from JFrog hosts our downloads and oss.jfrog.org our snapshots

JetBrainsImage Added

JetBrains give us licenses for TeamCity, our CI server, and IntelliJ IDEA

 

Latest news [more]

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