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

*** 4335,4344 ****
--- 4335,4345 ----
       * @serial include
       */
      private static class ArrayList<E> extends AbstractList<E>
          implements RandomAccess, java.io.Serializable
      {
+         @java.io.Serial
          private static final long serialVersionUID = -2764017481108945198L;
          private final E[] a;
  
          ArrayList(E[] array) {
              a = Objects.requireNonNull(array);