I really hope we're missing something obvious.So, in SimpleDateFormat Java provides us with two definitions of time zone, the General (z) and the RFC 822 (Z). General is long format, short format ...

First code to study, Object Oriented in Java with JFrame Form, Encapsulation (Java Bean), Organized Packages, Util.Date with SimpleDateFormat, etc.

Note that Groovy context can have automatic imports, in this case just adding import java.text.SimpleDateFormat to the default imports for the Groovy script runner. Calling functions with JSON ...