src/java.base/share/classes/java/lang/Class.java

*** 3419,3428 ****
--- 3419,3429 ----
                          .map(c -> c == null ? "null" : c.getName())
                          .collect(Collectors.joining(",", "(", ")")));
      }
  
      /** use serialVersionUID from JDK 1.1 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = 3206093459760846163L;
  
  
      /**
       * Class Class is special cased within the Serialization Stream Protocol.
*** 3438,3447 ****
--- 3439,3449 ----
       * is written into the stream. Future references to the class descriptor
       * are written as references to the initial class descriptor instance.
       *
       * @see java.io.ObjectStreamClass
       */
+     @java.io.Serial
      private static final ObjectStreamField[] serialPersistentFields =
          new ObjectStreamField[0];
  
  
      /**