Programming Books

5 Excellent Free Books to Learn Groovy

Apache 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 seamlessly 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.

It’s both a static and dynamic language with features similar to those of Python, Ruby, Perl, and Smalltalk. It can be used as both a programming language and a scripting language for the Java Platform.

The Grails and Gradle framework are built using the Groovy language. Most of the Groovy books will cover some Grails and Gradle and the same is true for Grails book, they offer some introduction to the Groovy programming language itself.


1. Getting Started with Grails, Second Edition by Scott Davis, Jason Rudolph

Getting Started GrailsGetting Started with Grails introduces Grails by example. You’ll see how to quickly build a Grails application from scratch and how to customize it to meet various needs.

You’ll need a basic knowledge of object-oriented programming and MVC web application development. You’ll benefit from a familiarity with Java.

The book doesn’t aim to explicitly teach Groovy, but the book offers extensive use of the language through its examples.

Chapters cover:

  • Installing Grails.
  • Creating a Gralls application.
  • Validation.
  • Relationships.
  • Databases.
  • Controllers.
  • Groovy Server Pages.
  • Security.
  • Plugins, Services, and Deployment.

Read the book.

It’s available in PDF, EPUB, and MOBI formats. You have to sign up for an account. And there’s a printed version available to purchase.


2. The Grails Framework by The Grails Team

Grails FrameworkGrails is an open source web application framework that uses the Apache Groovy programming language (which is in turn based on the Java platform).

It’s intended to be a high-productivity framework by following the “coding by convention” paradigm, providing a stand-alone development environment and hiding much of the configuration detail from the developer.

Read the book


3. Spock Framework Reference Documentation by Peter Niederwieser, Leonard Brünings, The Spock Framework Team

Spock Framework Reference DocumentationSpock is a testing and specification framework for Java and Groovy applications.

What makes it stand out from the crowd is its beautiful and highly expressive specification language. Thanks to its JUnit runner, Spock is compatible with most IDEs, build tools, and continuous integration servers.

Read the book


4. Gradle Goodness Notebook by Hubert Klein Ikkink

Gradle Goodness NotebookLearn more about Gradle features with code snippets and short articles. The articles and code will get you started quickly and will give more insight in Gradle.

The Gradle Goodness Notebook contains the blog posts about Gradle previously mentioned on the author’s blog. The posts have been edited slightly so they can be used for the book. The book gives a broad overview of all the great features in the Gradle build tool.

Read the book. It’s free to read online.


5. The Groovy 2 Tutorial by Duncan Dickinson

The Groovy 2 Tutorial

This book leads the reader through the basics of Groovy. The author hopes the book gives you a basis in understanding the language.

The book doesn’t include the output of most of the code examples. This is to reduce clutter, and to encourage the reader to experiment with the code.

Read the book


All books in this series:

Free Programming Books
AdaALGOL-like programming language, extended from Pascal and other languages
AgdaDependently typed functional language based on intuitionistic Type Theory
ArduinoInexpensive, flexible, open source microcontroller platform
AssemblyAs close to writing machine code without writing in pure hexadecimal
AwkVersatile language designed for pattern scanning and processing language
BashShell and command language; popular both as a shell and a scripting language
BASICBeginner’s All-purpose Symbolic Instruction Code
CGeneral-purpose, procedural, portable, high-level language
C++General-purpose, portable, free-form, multi-paradigm language
C#Combines the power and flexibility of C++ with the simplicity of Visual Basic
ClojureDialect of the Lisp programming language
ClojureScriptCompiler for Clojure that targets JavaScript
COBOLCommon Business-Oriented Language
CoffeeScriptTranscompiles into JavaScript inspired by Ruby, Python and Haskell
CoqDependently typed language similar to Agda, Idris, F* and others
CrystalGeneral-purpose, concurrent, multi-paradigm, object-oriented language
CSSCSS (Cascading Style Sheets) specifies a web page’s appearance
DGeneral-purpose systems programming language with a C-like syntax
DartClient-optimized language for fast apps on multiple platforms
DylanMulti-paradigm language supporting functional and object-oriented coding
ECMAScriptBest known as the language embedded in web browsers
EiffelObject-oriented language designed by Bertrand Meyer
ElixirRelatively new functional language running on the Erlang virtual machine
ErlangGeneral-purpose, concurrent, declarative, functional language
F#Uses functional, imperative, and object-oriented programming methods
FactorDynamic stack-based programming language
ForthImperative stack-based programming language
FortranThe first high-level language, using the first compiler
GoCompiled, statically typed programming language
GroovyPowerful, optionally typed and dynamic language
HaskellStandardized, general-purpose, polymorphically, statically typed language
HTMLHyperText Markup Language
IconWide variety of features for processing and presenting symbolic data
JArray programming language based primarily on APL
JavaGeneral-purpose, concurrent, class-based, object-oriented, high-level language
JavaScriptInterpreted, prototype-based, scripting language
JuliaHigh-level, high-performance language for technical computing
KotlinMore modern version of Java
LabVIEWDesigned to enable domain experts to build power systems quickly
LaTeXProfessional document preparation system and document markup language
LispUnique features - excellent to study programming constructs
LogoDialect of Lisp that features interactivity, modularity, extensibility
LuaDesigned as an embeddable scripting language
MarkdownPlain text formatting syntax designed to be easy-to-read and easy-to-write
Objective-CObject-oriented language that adds Smalltalk-style messaging to C
OCamlThe main implementation of the Caml language
PascalImperative and procedural language designed in the late 1960s
PerlHigh-level, general-purpose, interpreted, scripting, dynamic language
PHPPHP has been at the helm of the web for many years
PostScriptInterpreted, stack-based and Turing complete language
PrologA general purpose, declarative, logic programming language
PureScriptSmall strongly, statically typed language compiling to JavaScript
PythonGeneral-purpose, structured, powerful language
QMLHierarchical declarative language for user interface layout - JSON-like syntax
RDe facto standard among statisticians and data analysts
RacketGeneral-purpose, object-oriented, multi-paradigm, functional language
RakuMember of the Perl family of programming languages
RubyGeneral purpose, scripting, structured, flexible, fully object-oriented language
RustIdeal for systems, embedded, and other performance critical code
ScalaModern, object-functional, multi-paradigm, Java-based language
SchemeA general-purpose, functional language descended from Lisp and Algol
ScratchVisual programming language designed for 8-16 year-old children
SQLAccess and manipulate data held in a relational database management system
Standard MLGeneral-purpose functional language characterized as "Lisp with types"
SwiftPowerful and intuitive general-purpose programming language
TclDynamic language based on concepts of Lisp, C, and Unix shells
TeXMarkup and programming language - create professional quality typeset text
TypeScriptStrict syntactical superset of JavaScript adding optional static typing
ValaObject-oriented language, syntactically similar to C#
VHDLHardware description language used in electronic design automation
VimLPowerful scripting language of the Vim editor
XMLRules for defining semantic tags describing structure ad meaning
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