src/java.base/share/classes/java/text/ChoiceFormat.java

*** 166,175 ****
--- 166,176 ----
   * @since 1.1
   */
  public class ChoiceFormat extends NumberFormat {
  
      // Proclaim serial compatibility with 1.1 FCS
+     @java.io.Serial
      private static final long serialVersionUID = 1795184449645032964L;
  
      /**
       * Sets the pattern.
       * @param newPattern See the class description.
*** 526,535 ****
--- 527,537 ----
      /**
       * After reading an object from the input stream, do a simple verification
       * to maintain class invariants.
       * @throws InvalidObjectException if the objects read from the stream is invalid.
       */
+     @java.io.Serial
      private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
          in.defaultReadObject();
          if (choiceLimits.length != choiceFormats.length) {
              throw new InvalidObjectException(
                      "limits and format arrays of different length.");