--- old/src/java.base/share/classes/java/text/CompactNumberFormat.java	2019-08-27 17:28:20.526324386 -0700
+++ new/src/java.base/share/classes/java/text/CompactNumberFormat.java	2019-08-27 17:28:20.330324386 -0700
@@ -184,6 +184,7 @@
  */
 public final class CompactNumberFormat extends NumberFormat {
 
+    @java.io.Serial
     private static final long serialVersionUID = 7128367218649234678L;
 
     /**
@@ -1784,6 +1785,7 @@
      * @throws ClassNotFoundException if the class of a serialized object
      *         could not be found
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream inStream) throws IOException,
             ClassNotFoundException {