src/java.desktop/share/classes/java/awt/desktop/AppEvent.java

*** 36,45 ****
--- 36,48 ----
   *
   * @since 9
   */
  public class AppEvent extends EventObject {
  
+     /**
+      * Use serialVersionUID from JDK 9 for interoperability.
+      */
      private static final long serialVersionUID = -5958503993556009432L;
  
      /**
       * Constructs an {@code AppEvent}.
       *