--- old/src/share/classes/sun/awt/CausedFocusEvent.java	2011-12-02 17:45:35.300876100 +0400
+++ new/src/share/classes/sun/awt/CausedFocusEvent.java	2011-12-02 17:45:34.594835700 +0400
@@ -35,6 +35,7 @@
  * 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,