I have been using JDeveloper for many years, since the first release ;-). But I've never payed attention to a simple and very useful feature. When you click the Help > About menu you can access all the System properties of the Java VM used by Jdeveloper by clicking on the Properties tab
![]( http://static.flickr.com/109/268402753_19bd74c01b_o.png JDeveloper System Property Viewer )
Thanks to Gerard for the tip....