Groovy is a powerful, optionally typed and dynamic language, with static-typing and static compilation capabilities, for the Java platform aimed at improving developer productivity thanks to a concise, familiar and easy to learn syntax. It integrates smoothly with any Java program, and immediately delivers to your application powerful features, including scripting capabilities, Domain-Specific Language authoring, runtime and compile-time meta-programming and functional programming.

The Groovy Reference Guide provides beginners with a simple introduction to the basics, and experts will find advanced details they need.

In this you will see the following things below.

* Getting started
- Download Groovy
- Install Groovy
- Differences with Java
- The Groovy Development Kit
- Runtime and compile-time metaprogramming
- The Grape dependency manager
- Testing guide
- Domain-Specific Languages
- Integrating Groovy into applications
- Security
- Design patterns in Groovy
- Style guide

* Language Specification
- Syntax
- Operators
- Program structure
- Object orientation
- Closures
- Semantics

* Tools
- groovyc — the Groovy compiler
- groovysh — the Groovy command -like shell
- groovyConsole — the Groovy Swing console
- IDE integration

* Groovy module guides
- Parsing and producing JSON
- Working with a relational database
- Processing XML
- Scripting Ant tasks
- Template engines
- Creating Swing UIs
- Servlet support
- Working with JMX

You will find all this section offline without any internet connection and learn Groovy easily anywhere and anytime.