taken from field

Specifies whether this Stage should be a full-screen, undecorated window.

The implementation of full-screen mode is platform and profile-dependent.

When set to true, the Stage will attempt to enter full-screen mode when visible. Set to false to return Stage to windowed mode. An IllegalStateException is thrown if this property is set on a thread other than the JavaFX Application Thread.

The full-screen mode will be exited (and the fullScreen attribute will be set to false) if the full-screen Stage loses focus or if another Stage enters full-screen mode on the same Screen. Note that a Stage in full-screen mode can become invisible without losing its full-screen status and will again enter full-screen mode when the Stage becomes visible.

If the platform supports multiple screens an application can control which Screen the Stage will enter full-screen mode on by setting its position to be within the bounds of that Screen prior to entering full-screen mode.

However once in full-screen mode, Stage's x, y, width, and height variables will continue to represent the non-full-screen position and size of the window; the same for iconified, resizable, style, and opacity. If changes are made to any of these attributes while in full-screen mode, upon exiting full-screen mode the Stage will assume those attributes.

In case that more Stage modes are set simultaneously their order of importance is iconified, fullScreen, maximized (from strongest to weakest).

The property is read only because it can be changed externally by the underlying platform and therefore must not be bindable.

The user can unconditionally exit full-screen mode at any time by pressing ESC.

If a security manager is present, the application must have the javafx.util.FXPermission "unrestrictedFullScreen" in order to enter full-screen mode with no restrictions. Applications without permission will have the following restrictions:

Applications can only enter full-screen mode in response to user input. More specifically, entering is allowed from mouse ( Node.mousePressed/mouseReleased/mouseClicked) or keyboard ( Node.keyPressed/keyReleased/keyTyped) event handlers. It is not allowed to enter full-screen mode in response to ESC key. Attempting to enter full-screen mode from any other context will be ignored.
If Stage was constructed as full-screen but not visible it will enter full-screen mode upon becoming visible, with the same limitations to when this is allowed to happen as when setting fullScreen to true.
If the application was allowed to enter full-screen mode it will have limited keyboard input. It will only receive KEY_PRESSED and KEY_RELEASED events from the following keys: UP, DOWN, LEFT, RIGHT, SPACE, TAB, PAGE_UP, PAGE_DOWN, HOME, END, ENTER

@defaultValue false