public void xRequestFocus() {
   XToolkit.awtLock();
   try {
     if (focusLog.isLoggable(Level.FINER))
       focusLog.finer("XSetInputFocus on " + Long.toHexString(getWindow()));
     XlibWrapper.XSetInputFocus(XToolkit.getDisplay(), getWindow());
   } finally {
     XToolkit.awtUnlock();
   }
 }