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

*** 117,123 ****
--- 117,124 ----
      public short shortValue() {
          return (short)intValue();
      }
  
      /** use serialVersionUID from JDK 1.0.2 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = -8742448824652078965L;
  }