The document introduces Groovy, a dynamic programming language for the Java platform. Groovy builds upon Java's strengths but aims to be more readable, less verbose, and bring modern features inspired by languages like Python and Ruby. The document discusses what Groovy is, why developers may want to use it over Java, how to install and integrate it with Java projects, available tools, key features for Java developers, and resources for learning more. It concludes by inviting the reader to get hands-on with code examples.

1. Groovy – An Introduction
Giri Pottepalem
Nov 20, 2013
www.cognitomedia.com

2. What we will cover today…
 What is Groovy?
 Why Groovy (when we have Java)?
 Installation and Integration with Java
 Tools
 Groovy for Java Eyes
 Resources
 Hands on, code examples etc.

3. What is Groovy?
 Agile and Dynamic Programming language for Java Platform
(JVM)
 Builds upon the strengths of Java Language
 Better, Lighter Java
 More readable, less verbose, less noisy than Java
 Brings in powerful modern programming features to Java,
inspired by languages like Python, Ruby and Smalltalk
 Backed by VMware
 Taken into core Spring technology stack of latest Spring Eco
System (http://spring.io/platform)

4. Why Groovy (when we have Java)?
 We are coding in 2013
 Many things around us have changed, but not Java
 Java evolved as a robust and matured platform, but language is still
1990s and started to show it’s age
 Polyglot Programming
 Productive language
 A flat learning curve for Java Developers
 Interoperates with Java seamlessly, compiles to java byte code
 Brings the Joy or Programming back to Java

5. Installation and Integration
Installation
 http://groovy.codehaus.org/ - Download, unzip
 Set env variable GROOVY_HOME
 Add %GROOVY_HOME%bin to PATH
Integration
 All you need is just one jar file for Java applications (groovy-all.jar)

6. Tools
 groovysh
 groovyconsole
 IDE plugins (Eclipse, IntelliJ)

7. Groovy for Java Eyes
 Optional Java features
 Semicolon, parenthesis, obvious scopes, return statement etc.
 Enhanced JDK classes
 GDK Classes
 Native Language support for Collections with consistent syntax like
Java arrays
 Groovy Beans
 Groovy truth
 Exception Handling
 Classes, Scripts, Constructors etc
 Operator overloading
 Convenient operators (?. , *. , ?: , << etc. )
 Annotations (@Log4j, @ToString etc.)

8. Resources
 http://groovy.codehaus.org/
 http://groovyblogs.org/
Books
….and there are even more

9. Let’s get some hands on

10. Let’s get some hands on