src/java.base/share/classes/java/io/UnsupportedEncodingException.java

*** 31,40 ****
--- 31,41 ----
   * @since   1.1
   */
  public class UnsupportedEncodingException
      extends IOException
  {
+     @java.io.Serial
      private static final long serialVersionUID = -4274276298326136670L;
  
      /**
       * Constructs an UnsupportedEncodingException without a detail message.
       */