The use of JAVA_OPTS with Groovy is not limited to specifying heap sizes. Indeed, the Native Launcher JAVA_OPTS section states: “The environment variable JAVA_OPTS can be used to set JVM options ...

In the posts JDK 7: New Interfaces, Classes, Enums, and Methods and Groovy Script for Comparing Javadoc Versions, I looked at using Groovy to identify Java constructs new to Java 7 documentation ...