diff -r 05c1e4d50f9a -r 2f3c0bd6b987 src/java.base/share/classes/java/security/PKCS12Attribute.java
--- a/src/java.base/share/classes/java/security/PKCS12Attribute.java	Sat Apr 07 17:07:13 2018 -0700
+++ b/src/java.base/share/classes/java/security/PKCS12Attribute.java	Sun Apr 08 11:32:46 2018 +0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 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
@@ -44,7 +44,7 @@
         Pattern.compile("^[0-9a-fA-F]{2}(:[0-9a-fA-F]{2})+$");
     private String name;
     private String value;
-    private byte[] encoded;
+    private final byte[] encoded;
     private int hashValue = -1;
 
     /**
@@ -199,7 +199,7 @@
         if (!(obj instanceof PKCS12Attribute)) {
             return false;
         }
-        return Arrays.equals(encoded, ((PKCS12Attribute) obj).getEncoded());
+        return Arrays.equals(encoded, ((PKCS12Attribute) obj).encoded);
     }
 
     /**
@@ -210,10 +210,11 @@
      */
     @Override
     public int hashCode() {
-        if (hashValue == -1) {
-            Arrays.hashCode(encoded);
+        int h = hashValue;
+        if (h == -1) {
+            hashValue = h = Arrays.hashCode(encoded);
         }
-        return hashValue;
+        return h;
     }
 
     /**