The first edition of Groovy in Action is the undisputed definitive reference on the Groovy language. Written by core members of the Groovy language team, this book presents Groovy like none other can from the inside out. Since its introduction a few years back, Groovy has grown from an upstart dynamic language for the JVM to become an integral part of any Java developer's toolbox. Projects like Grails and Griffon have extended Groovy's reach into the web and desktop app world. Groovy in Action, Second Edition is a thoroughly-revised, comprehensive guide to Groovy programming. It introduces Java developers to the dynamic features that Groovy provides, and shows you how to apply Groovy to a range of tasks including building new apps, integration with existing code, and DSL development. This book introduces Groovy by example, presenting lots of reusable code while explaining the underlying concepts. Java developers new to Groovy find a smooth transition into the dynamic programming world. Groovy experts gain a solid reference that challenges them to explore Groovy deeply and creatively. For readers learning it from scratch. Groovy in Action thoroughly moves through the Groovy basics, including: Groovy's unique approach of optional typing Simple and collective Groovy data types Working with closures and Groovy control structures The merits of Metaprogramming Readers are presented with rich and detailed examples illustrating Groovy's enhancements to Java, including: How to work with builders and the GDK Database and XML programming with Groovy Concurrency for the multicore era: actors, asynchronous collections and dataflow Building Domain Specific languages a very hot topic! Groovy in Action then demonstrates how to integrate Groovy in Java projects and provides: Tips and Tricks Unit testing and build support Groovy frameworks, including Grails, Griffon, and Groovy on Windows