title: Eclipse RCP multithreading
body: <p>I have an eclipse rcp application. And I have a command when this command is executing. I need to start a thread. After execution of this thread GUI must be updated. But I suppose that this thread or other non-SWT thread cannot update GUI. But it seems reasonable. When I was trying to do that I got <code>Exception in thread "Thread-5" org.eclipse.swt.SWTException: Invalid thread access</code>. How I can make this goal?</p>