For those new to both Java and Groovy

If you don't already know Java, these pages are for you.

The Groovy Math facilities in depth:

         Groovy Integer Math - choose from many types of integers

         Groovy BigDecimal Math - for high-precision decimal math

         Groovy Floating Point Math - for high-speed decimal math

Collections: 

         Lists and Sets - convenient notation to group items into a collection

         Object Arrays - fixed-size arrays for faster collections

         Maps and Sorted Maps - convenient notation to assign values to keys NEW ON 29 MARCH 2007

Characters in Groovy NEW ON 4 APRIL 2007

Groovy Data Structures:

         Blocks, Closures, and Functions

         Expandos, Classes, and Categories
 

Using Interceptors with the ProxyMetaClass - intercept calls to methods

Java Reflection in Groovy - how to examine and manipulate objects and their fields and methods when their names aren't known at compile time.