src/share/classes/com/sun/java/swing/plaf/windows/WindowsTextFieldUI.java

@@ -98,10 +98,11 @@
 
     /**
      * WindowsFieldCaret has different scrolling behavior than
      * DefaultCaret.
      */
+    @SuppressWarnings("serial") // Superclass is not serializable across versions
     static class WindowsFieldCaret extends DefaultCaret implements UIResource {
 
         public WindowsFieldCaret() {
             super();
         }