diff -r 18863bf3501f -r e0b8b019d2f5 src/java.base/share/classes/sun/util/BuddhistCalendar.java
--- a/src/java.base/share/classes/sun/util/BuddhistCalendar.java	Thu Aug 29 18:52:30 2019 -0400
+++ b/src/java.base/share/classes/sun/util/BuddhistCalendar.java	Thu Aug 29 16:31:34 2019 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2019, 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
@@ -39,6 +39,7 @@
 // Class Variables
 //////////////////
 
+    @java.io.Serial
     private static final long serialVersionUID = -8527488697350388578L;
 
     private static final int BUDDHIST_YEAR_OFFSET = 543;
@@ -254,6 +255,7 @@
 
     private transient int yearOffset = BUDDHIST_YEAR_OFFSET;
 
+    @java.io.Serial
     private void readObject(ObjectInputStream stream)
         throws IOException, ClassNotFoundException {
         stream.defaultReadObject();