src/java.base/share/classes/java/util/FormatterClosedException.java

*** 34,43 ****
--- 34,44 ----
   *
   * @since 1.5
   */
  public class FormatterClosedException extends IllegalStateException {
  
+     @java.io.Serial
      private static final long serialVersionUID = 18111216L;
  
      /**
       * Constructs an instance of this class.
       */