import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
public class MainClass {
public static void main(String[] a) {
Shell s = new Shell();
MessageBox messageBox = new MessageBox(s, SWT.ICON_QUESTION | SWT.YES | SWT.NO);
messageBox.setMessage("Do you really want to exit?");
messageBox.setText("Exiting Application");
int response = messageBox.open();
if (response == SWT.YES)
System.out.println(SWT.YES);
else if(response == SWT.NO)
System.out.println(SWT.NO);
}
}