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

*** 28,50 ****
  import java.awt.Desktop;
  import java.awt.GraphicsEnvironment;
  import java.awt.HeadlessException;
  
  /**
!  * Event sent when the user session has been changed.
!  *
!  * Some systems may provide a reason of a user session change.
   *
   * @see UserSessionListener#userSessionActivated(UserSessionEvent)
   * @see UserSessionListener#userSessionDeactivated(UserSessionEvent)
-  *
   * @since 9
   */
  public final class UserSessionEvent extends AppEvent {
  
      private static final long serialVersionUID = 6747138462796569055L;
  
      private final Reason reason;
  
      /**
       * Kinds of available reasons of user session change.
       */
--- 28,54 ----
  import java.awt.Desktop;
  import java.awt.GraphicsEnvironment;
  import java.awt.HeadlessException;
  
  /**
!  * Event sent when the user session has been changed. Some systems may provide a
!  * reason of a user session change.
   *
   * @see UserSessionListener#userSessionActivated(UserSessionEvent)
   * @see UserSessionListener#userSessionDeactivated(UserSessionEvent)
   * @since 9
   */
  public final class UserSessionEvent extends AppEvent {
  
+     /**
+      * Use serialVersionUID from JDK 9 for interoperability.
+      */
      private static final long serialVersionUID = 6747138462796569055L;
  
+     /**
+      * The reason of the user session change.
+      */
      private final Reason reason;
  
      /**
       * Kinds of available reasons of user session change.
       */