If you are going to do any amount of serious Groovy coding, you will want to work with Groovy in your favorite IDE.
Of the popular IDE environments, Netbeans was the first to provide built-in Groovy support. From Netbeans 6.5 onwards, Groovy support is available from within any of the Java bundles without any additional plug-ins being required. By default, you have excellent Groovy source editing with syntax highlighting, source folding, and code completion. You can mix and match Groovy with Java in your projects, or build a full Groovy on Grails-based project from scratch.
Eclipse was the first Java IDE to have Groovy support integrated through the GroovyEclipse plug-in. You can download an archive of the GroovyEclipse plug-in from http://dist.codehaus.org/groovy/distributions/update/GroovyEclipse.zip. Or better still, use the update site at http://dist.codehaus.org/groovy/distributions/updateDev/. The GroovyEclipse plug-in has full...