src/java.base/share/classes/java/net/MalformedURLException.java

*** 34,43 ****
--- 34,44 ----
   *
   * @author  Arthur van Hoff
   * @since   1.0
   */
  public class MalformedURLException extends IOException {
+     @java.io.Serial
      private static final long serialVersionUID = -182787522200415866L;
  
      /**
       * Constructs a {@code MalformedURLException} with no detail message.
       */