--- a/jdk/src/share/classes/java/awt/Container.java	Fri May 04 13:15:49 2012 +0400
+++ b/jdk/src/share/classes/java/awt/Container.java	Fri May 04 18:42:08 2012 +0400
@@ -3093,6 +3093,9 @@
      * Set from its parent. If all ancestors of this Container have null
      * specified for the Set, then the current KeyboardFocusManager's default
      * Set is used.
+     * <p>
+     * This method may throw a {@code ClassCastException} if any {@code Object}
+     * in {@code keystrokes} is not an {@code AWTKeyStroke}.
      *
      * @param id one of KeyboardFocusManager.FORWARD_TRAVERSAL_KEYS,
      *        KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
@@ -3109,8 +3112,7 @@
      *         KeyboardFocusManager.BACKWARD_TRAVERSAL_KEYS,
      *         KeyboardFocusManager.UP_CYCLE_TRAVERSAL_KEYS, or
      *         KeyboardFocusManager.DOWN_CYCLE_TRAVERSAL_KEYS, or if keystrokes
-     *         contains null, or if any Object in keystrokes is not an
-     *         AWTKeyStroke, or if any keystroke represents a KEY_TYPED event,
+     *         contains null, or if any keystroke represents a KEY_TYPED event,
      *         or if any keystroke already maps to another focus traversal
      *         operation for this Container
      * @since 1.4