*** 37,46 **** --- 37,49 ---- * @see PrintFilesHandler#printFiles(PrintFilesEvent) * @since 9 */ public final class PrintFilesEvent extends FilesEvent { + /** + * Use serialVersionUID from JDK 9 for interoperability. + */ private static final long serialVersionUID = -5752560876153618618L; /** * Constructs a {@code PrintFilesEvent}. *