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

*** 37,46 ****
--- 37,47 ----
   * @author  unascribed
   * @since   1.0
   */
  public
  class ClassCastException extends RuntimeException {
+     @java.io.Serial
      private static final long serialVersionUID = -9223365651070458532L;
  
      /**
       * Constructs a <code>ClassCastException</code> with no detail message.
       */