groovy> sdf = new java.text.SimpleDateFormat("HH:mm:ss.SSS");
groovy> go

===> java.text.SimpleDateFormat@85c13e85

groovy> dt = sdf.parseDate("12:15:06.0089");
groovy> go
Caught: groovy.lang.MissingMethodException: No signature of method: java.text.SimpleDateFormat.parseDate() is applicable for argument types: (java.lang.String) values: {"12:15:06.0089"}
        at CommandLine.run(CommandLine.groovy:1)

groovy> dt = sdf.parse("12:15:06.0089");
groovy> go

===> Thu Jan 01 12:15:06 EST 1970

groovy> print sdf.format(dt);
groovy> go
12:15:06.089