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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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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 "Hello World!"

Leveraging existing Java libraries:

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

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

new Greeter('world').salute()

On the command line:

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

...