In the Method Detail section of the JFrame and Frame api for the setIconImage(Image image) method it says that if the image parameter is null then the default icon image will be used, depending on the platform. You can try a blank image.
[ December 28, 2004: Message edited by: Craig Wood ]
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com