***WARNING: Display must be created on main thread due to Cocoa restrictions.
Exception in thread "main" org.eclipse.swt.SWTException: Invalid thread access
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.SWT.error(Unknown Source)
	at org.eclipse.swt.widgets.Display.error(Unknown Source)
	at org.eclipse.swt.widgets.Display.createDisplay(Unknown Source)
	at org.eclipse.swt.widgets.Display.create(Unknown Source)
	at org.eclipse.swt.graphics.Device.<init>(Unknown Source)
	at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
	at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
	at study.myswt.menus_toolbars.SimpleToolBarEx.main(SimpleToolBarEx.java:591)