--- old/src/share/classes/java/util/function/IntBinaryOperator.java	2012-12-05 09:51:11.274804628 -0800
+++ new/src/share/classes/java/util/function/IntBinaryOperator.java	2012-12-05 09:51:11.066804618 -0800
@@ -27,9 +27,27 @@
 /**
  * An operation on two {@code int} operands yielding an {@code int} result.
  *
+ * <p>This is the primitive type specialization of {@link BinaryOperator} for
+ * {@code int} and also may be used as a {@code BinaryOperator<Integer>}. When
+ * used as a {@code BinaryOperator} the default {@code operate} implementation
+ * provided by this interface neither accepts null parameters nor does it return
+ * null results.
+ *
  * @since 1.8
  */
-public interface IntBinaryOperator {
+public interface IntBinaryOperator extends BinaryOperator<Integer> {
+
+    /**
+     * {@inheritDoc}
+     *
+     * @param left {@inheritDoc}, must be non-null
+     * @param right {@inheritDoc}, must be non-null
+     * @return {@inheritDoc}, always non-null
+     */
+    @Override
+    public default Integer operate(Integer left, Integer right) {
+        return operateAsInt((int)left, (int)right);
+    }
 
     /**
      * Returns the {@code int} result of the operation upon the {@code int}