Groovy

Groovy is an open source programming language created in 2003 by James Strachan.

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Apache Groovy is an object-oriented programming language for the Java platform. It is a dynamic language with features similar to those of Python, Ruby, Perl, and Smalltalk. It can be used as a scripting language for the Java Platform, is dynamically compiled to Java virtual machine (JVM) bytecode, and interoperates with other Java code and libraries. Read more on Wikipedia...

Groovy website
Groovy downloads page
Groovy Wikipedia page
PLDB has 2 documentation sites for Groovy: groovy-lang.org, devdocs.io
There are at least 76,001 Groovy repos on GitHub
Groovy first developed in https://github.com/grails
Groovy on Twitter
The Google BigQuery Public Dataset GitHub snapshot shows 20k users using Groovy in 27k repos on GitHub
Check out the 49 Groovy meetup groups on Meetup.com.
There are 2,900 members in the Groovy subreddit
There are 121 Project Euler users using Groovy
In the 2021 StackOverflow developer survey Groovy programmers reported a median salary of $75,002. 3% of respondents reported using Groovy. 2,479 programmers reported using Groovy, and 1,177 said they wanted to use it
Explore Groovy snippets on Rosetta Code
Groovy ranks #29 in the TIOBE Index
Groovy Ubuntu package
Groovy LSP implementation
CodeMirror package for syntax highlighting Groovy
Pygments supports syntax highlighting for Groovy
GitHub supports syntax highlighting for Groovy
Groovy appears in the Quine Relay project
Release Notes for Groovy
Official Blog page for Groovy
Frequently Asked Questions for Groovy
groovy-lang.org was registered in 2011
See also: (18 related languages)Java, Python, Ruby, Perl, Smalltalk, Objective-C, Kotlin, JVM, Regular Expressions, XML, HTML, JSON, Android, Eclipse, Emacs, TextMate, Visual Studio Code, JavaScript

Example from Riju:

print "Hello, world!";

Example from hello-world:

println "Hello World"

Example from the Hello World Collection:

// Hello World in Groovy

println "Hello World"

Example from Linguist:

#!/usr/bin/env groovy
println "Groovy!"

Example from Wikipedia:

class Bird implements FlyingAbility {} /* Adds the trait FlyingAbility to the Bird class capabilities */
def bird = new Bird() /* instantiate a new Bird */
assert bird.fly() == "I'm flying!" /* the Bird class automatically gets the behavior of the FlyingAbility trait */

Groovy Keywords

as assert break case catch class const continue def default do else enum extends false finally for goto if implements import in instanceof interface new null package return super switch this throw throws trait true try while

Feature	Supported	Token	Example
Conditionals	✓
Inheritance	✓
Switch Statements	✓
Functions	✓
Exceptions	✓
Constants	✓
Classes	✓
While Loops	✓
Booleans	✓	true false
Strings	✓	"	"Hello world"
MultiLine Comments	✓	/* */	/* A comment */
Print() Debugging	✓	println
Comments	✓		// A comment
Line Comments	✓	//	// A comment
Operator Overloading	✓
Semantic Indentation	X

Language features