src/java.base/share/classes/java/util/Vector.java

@@ -100,10 +100,11 @@
      *
      * <p>Any array elements following the last element in the Vector are null.
      *
      * @serial
      */
+    @SuppressWarnings("serial") // Conditionally serializable
     protected Object[] elementData;
 
     /**
      * The number of valid components in this {@code Vector} object.
      * Components {@code elementData[0]} through