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

*** 151,160 ****
--- 151,161 ----
           *
           * @return the resolved {@code Attribute} object
           * @throws InvalidObjectException if the object to resolve is not
           *                                an instance of {@code Attribute}
           */
+         @java.io.Serial
          protected Object readResolve() throws InvalidObjectException {
              if (this.getClass() != Attribute.class) {
                  throw new InvalidObjectException("subclass didn't correctly implement readResolve");
              }
  
*** 192,201 ****
--- 193,203 ----
           * @see Annotation
           */
          public static final Attribute INPUT_METHOD_SEGMENT = new Attribute("input_method_segment");
  
          // make sure the serial version doesn't change between compiler versions
+         @java.io.Serial
          private static final long serialVersionUID = -9142742483513960612L;
  
      };
  
      /**