Groovy's major plus point is its seamless integration with Java. I was attracted to Groovy mainly becuase you can mix and match Groovy with Java. If you attended the 2GX conference last week in Reston, VA you will have definitely attended Scott Davis's session on Groovy and Grails. I have attended many of his sessions myself in the NFJS conferences and have enjoyed every minute.
Here comes an interesting book from Scott Davis "Groovy Recipes: Greasing the Wheels of Java".
As per the publisher, Pragmatic Bookshelf, if you’re a busy Java professional who needs quick solutions to everyday problems, then Groovy Recipes is for you. The Groovy language and Grails web framework give you seamless integration with your legacy Java code while adding the flexibility and dynamism of a scripting language and giving you modern, agile, time-saving techniques. Groovy allows you to write code the way you always thought you should—you’ll never look at Java the same way again.
Each recipe in Groovy Recipes begins with a concise code example for a quick start, followed by in-depth explanation in plain English. These recipes will get you to-to-speed in a Groovy environment quickly.
You’ll see how to speed up nearly every aspect of the development process using Groovy. Groovy makes mundane file management tasks like copying and renaming files trivial. Reading and writing XML has never been easier with XmlParsers and XmlBuilders. Breathe new life into Arrays, Maps, and Lists with a number of convenience methods. But Groovy does more than just ease traditional Java development: it brings modern programming features to the Java platform like closures, duck-typing, and metaprogramming.
You can read more about this book at the folloiwng links: