src/share/classes/javax/swing/JLayer.java

*** 146,155 ****
--- 146,156 ----
   * @see #getUI()
   * @since 1.7
   *
   * @author Alexander Potochkin
   */
+ @SuppressWarnings("serial") // Superclass is not serializable across versions
  public final class JLayer<V extends Component>
          extends JComponent
          implements Scrollable, PropertyChangeListener, Accessible {
      private V view;
      // this field is necessary because JComponent.ui is transient
*** 685,694 ****
--- 686,696 ----
      /**
       * Gets the AccessibleContext associated with this {@code JLayer}.
       *
       * @return the AccessibleContext associated with this {@code JLayer}.
       */
+     @SuppressWarnings("serial") // anonymous class
      public AccessibleContext getAccessibleContext() {
          if (accessibleContext == null) {
              accessibleContext = new AccessibleJComponent() {
                  public AccessibleRole getAccessibleRole() {
                      return AccessibleRole.PANEL;
*** 823,832 ****
--- 825,835 ----
  
      /**
       * The default glassPane for the {@link javax.swing.JLayer}.
       * It is a subclass of {@code JPanel} which is non opaque by default.
       */
+     @SuppressWarnings("serial") // Superclass is not serializable across versions
      private static class DefaultLayerGlassPane extends JPanel {
          /**
           * Creates a new {@link DefaultLayerGlassPane}
           */
          public DefaultLayerGlassPane() {