src/share/classes/sun/awt/CausedFocusEvent.java

*** 33,42 ****
--- 33,43 ----
   * be mouse press, traversal, activation, and so on - all causes are described as Cause enum. The
   * event with the cause can be constructed in two ways - explicitly through constructor of
   * CausedFocusEvent class or implicitly, by calling appropriate requestFocusXXX method with "cause"
   * parameter. The default cause is UNKNOWN.
   */
+ @SuppressWarnings("serial")
  public class CausedFocusEvent extends FocusEvent {
      public enum Cause {
          UNKNOWN,
          MOUSE_EVENT,
          TRAVERSAL,