Hello.

Any input regarding screensaver programming using JAVA, please? 

Thanks in advance.

First, think of what you want to accomplish. This program draws random shapes to a frame...

http://www.cs.indiana.edu/classes/a202-dger/spr2006/notes/labs7-25/tut20/ScreenSaver.java

Then you need to make your app full screen...

http://exampledepot.com/egs/java.awt/screen_FullWin.html

Once your app  is done. The last thing you have to do is (not sure about this) to call your java app from another program written in another language like VB. Perhaps the microsoft guys here have an idea because I dunno if you can register your java app natively as a screensaver in windows.

Or... Take a look and study this project called... serverbeans https://screensavers.dev.java.net/

Actually, I want to trigger to manipulate (start, stop, etc) a computer's existing screensaver using java.