--- old/src/java.base/share/classes/jdk/internal/org/xml/sax/SAXException.java	2019-08-27 17:29:25.326324386 -0700
+++ new/src/java.base/share/classes/jdk/internal/org/xml/sax/SAXException.java	2019-08-27 17:29:25.146324386 -0700
@@ -178,6 +178,7 @@
     // Internal state.
     //////////////////////////////////////////////////////////////////////
 
+    @java.io.Serial
     private static final ObjectStreamField[] serialPersistentFields = {
         new ObjectStreamField( "exception", Exception.class )
     };
@@ -188,6 +189,7 @@
      * @param out stream used for serialization.
      * @throws IOException thrown by <code>ObjectOutputStream</code>
      */
+    @java.io.Serial
     private void writeObject(ObjectOutputStream out)
             throws IOException {
         ObjectOutputStream.PutField fields = out.putFields();
@@ -204,6 +206,7 @@
      * @throws IOException            thrown by <code>ObjectInputStream</code>
      * @throws ClassNotFoundException thrown by <code>ObjectInputStream</code>
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream in)
             throws IOException, ClassNotFoundException {
         ObjectInputStream.GetField fields = in.readFields();
@@ -233,6 +236,7 @@
     }
 
     // Added serialVersionUID to preserve binary compatibility
+    @java.io.Serial
     static final long serialVersionUID = 583241635256073760L;
 }