code: public static void setDefaultCursor (Cursor defaultCursor) {
  		if (defaultCursor == null) throw new IllegalArgumentException("defaultCursor can't be null");
  		CursorManager.defaultCursor = defaultCursor;
  		CursorManager.systemCursorAsDefault = false;
  	}
docs: Sets cursor that will be used as default when {@link #restoreDefaultCursor()} is called, for example by VisUI widget.
  @param defaultCursor default cursor, can't be null