--- old/src/share/classes/java/util/function/IntFunction.java	2012-12-05 09:51:12.618804694 -0800
+++ new/src/share/classes/java/util/function/IntFunction.java	2012-12-05 09:51:12.410804683 -0800
@@ -28,11 +28,26 @@
  * Apply a function to the input object yielding an appropriate {@code int}
  * value; this is the {@code int}-bearing specialization for {@link Function}.
  *
+ * <p>When used as a {@code Function} the default {@code apply} implementation
+ * provided by this interface neither accepts null parameters nor does it return
+ * null results.
+ *
  * @param <T> the type of input objects to the function
  *
  * @since 1.8
  */
-public interface IntFunction<T> {
+public interface IntFunction<T> extends Function<T,Integer> {
+
+    /**
+     * {@inheritDoc}
+     *
+     * @param t {@inheritDoc}, must be non-null
+     * @return {@inheritDoc}, always non-null
+     */
+    @Override
+    public default Integer apply(T t) {
+        return applyAsInt(t);
+    }
 
     /**
      * Apply a function to the input object yielding an appropriate {@code int}