You can, for a really terrible method without cross-platform, use VBScript .ShellExecute and Runtime.exec to force the program to run as an administrator.
For brevity, I created a simple program available at https://dl.dropbox.com/u/26746878/Misc/JavaElevated.zip
It can be launched using java Launcher .
From NetBeans, I would suggest that you somehow ask him to launch Launcher as the main class instead of the main Program .
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