Why can’t I programmatically close the dialog on JavaFX?

This code example shows but does not turn off JavaFX on JavaFX scene. control. Dialog:

Dialog<Void> dialog = new Dialog<Void>();
dialog.show();
dialog.close();

or

Dialog<Void> dialog = new Dialog<Void>();
dialog.show();
dialog.hide();

Why?

Solution

From Javadoc:

(emphasize my)

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