diff -r 56135e8cbc46 -r 36121d698418 jdk/src/share/classes/java/util/Optional.java
--- a/jdk/src/share/classes/java/util/Optional.java	Fri Sep 27 17:09:25 2013 -0700
+++ b/jdk/src/share/classes/java/util/Optional.java	Fri Sep 27 17:27:15 2013 -0700
@@ -85,6 +85,7 @@
      * Constructs an instance with the value present.
      *
      * @param value the non-null value to be present
+     * @throws NullPointerException if value is null
      */
     private Optional(T value) {
         this.value = Objects.requireNonNull(value);
@@ -96,6 +97,7 @@
      * @param <T> the class of the value
      * @param value the value to be present, which must be non-null
      * @return an {@code Optional} with the value present
+     * @throws NullPointerException if value is null
      */
     public static <T> Optional<T> of(T value) {
         return new Optional<>(value);