public static void setDisplayedMnemonicIndex(JComponent component, int index) {
    try {
      Method method = component.getClass().getMethod("setDisplayedMnemonicIndex", int.class);
      method.setAccessible(true);
      method.invoke(component, Integer.valueOf(index));
    }
    catch (Exception e) {
      // JDK earlier than 1.4 - do nothing
    }
  }
public static void setDisplayedMnemonicIndex(JComponent component, int index)