Alignment can be either SWT.LEFT or SWT.RIGHT.
The button dismissal alignment is used when positioning the default dismissal button for a dialog.
For example, if alignement is LEFT, the button order should be OK, CANCEL.
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
public class MainClass {
static Display display = new Display();
public static void main(String[] args) {
System.out.println(display.getDismissalAlignment() == SWT.LEFT);
System.out.println(display.getDismissalAlignment() == SWT.RIGHT);
}
}