src/java.base/share/classes/java/lang/Number.java

@@ -50,10 +50,11 @@
   * @author      Arthur van Hoff
   * @jls 5.1.2 Widening Primitive Conversion
   * @jls 5.1.3 Narrowing Primitive Conversion
   * @since   1.0
   */
+ @jdk.internal.MigratedValueClass
  public abstract class Number implements java.io.Serializable {
      /**
       * Constructor for subclasses to call.
       */
      public Number() {super();}