--- old/src/share/classes/java/lang/Thread.java	2013-02-05 13:59:15.000000000 -0800
+++ new/src/share/classes/java/lang/Thread.java	2013-02-05 13:59:15.000000000 -0800
@@ -1851,6 +1851,7 @@
      * @see ThreadGroup#uncaughtException
      * @since 1.5
      */
+    @FunctionalInterface
     public interface UncaughtExceptionHandler {
         /**
          * Method invoked when the given thread terminates due to the