Disable vertical sync in fullscreen

Hello,
I have a game that runs in both windowed and fullscreen modes. I am able to switch dynamically between them while the game is running. When in windowed mode, the game runs very quickly. When in fullscreen, it runs significantly slower. When it's switched back to windowed, it runs quickly again.
It's been suggested that the cause may be that the page flipping in fullscreen exclusive mode is based on the sync rate of the display. Is there a way to disable vertical sync?
Thank you.

Maxideon wrote:
Painting in fullscreen mode should be handled slightly different then painting in windowed mode.
http://java.sun.com/docs/books/tutorial/extra/fullscreen/rendering.html
Are you sure that it's not the mechanism in which you are painting that is causing the slow down in fullscreen mode?
As for actually disabling vertical sync, I don't know if java can do that. I'm not even sure if it's enabled, or if there's any way to query if java is doing vertical sync or not. I am curious, though, as to what this method does
java.awt.Toolkit.getDefaultToolkit().sync();
Thank you for your reply. I'm already using active rendering for both windowed and fullscreen modes. Since I'm drawing the entire contents of the window, I figured it would be easier to use active rendering with a Canvas. The drawing code is the same for the fullscreen and windowed modes.

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*\^^/*
(OO)
<---->
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Disable vertical sync in fullscreen

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