--- old/src/java.base/share/classes/java/util/OptionalLong.java	2018-04-16 10:24:17.098964745 -0700
+++ new/src/java.base/share/classes/java/util/OptionalLong.java	2018-04-16 10:24:16.790936386 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -140,6 +140,16 @@
     }
 
     /**
+     * If a value is not present, returns {@code true}, otherwise
+     * {@code false}.
+     *
+     * @return {@code true} if a value is not present, otherwise {@code false}
+     */
+    public boolean isEmpty() {
+        return !isPresent;
+    }
+
+    /**
      * If a value is present, performs the given action with the value,
      * otherwise does nothing.
      *