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Groovy for Java developersPeter Ledbrook

w: http://www.cacoethes.co.uk/ e: p.ledbrook@cacoethes.co.uk t: @pledbrook

To answer the question…

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Why would you use a language called Groovy?

Background

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OO language for the JVM

Java-like syntax

Optional types

Dynamic or Static - your choice!

Simple & expressive

What is Groovy?

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Groovy Source

Java Byte Code

JVM

Compilation

java -cp groovy-all-2.3.0.jar …

Groovy is compiled

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Groovy Source

Java Byte Code

JVM

Compilation

java -cp groovy-all-2.3.0.jar …

Groovy is compiled

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Just add Groovy JAR to your classpath

http://groovyconsole.appspot.com/

How do you use it?

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How do you use it?

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Download Groovy development kit (GDK)

Install

groovy, groovyConsole, groovysh

http://groovy.codehaus.org/Download

How do you use it?

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Install msysgit

Install GVM

gvm install groovy 2.2.2

http://gvmtool.net/

(Windows only)

Run as Administrator

How do you use it?

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Demo

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In summary

• Great for cross-platform scripting

• Ideal for tests

• Seamless integration with Java

• Solid for application development

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A great ecosystem!

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Geb

SpockGVM

Ratpack

Groovy on Android

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+

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http://melix.github.io/blog/2014/06/grooid.html

More info

• Docs: http://groovy-lang.org/docs/groovy-2.3.3/html/

documentation/

• Groovy JDK: http://groovy-lang.org/docs/groovy-2.3.3/html/

groovy-jdk/

• Groovy Koans: http://groovykoans.org/

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Thank you!