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

@@ -4337,10 +4337,11 @@
     private static class ArrayList<E> extends AbstractList<E>
         implements RandomAccess, java.io.Serializable
     {
         @java.io.Serial
         private static final long serialVersionUID = -2764017481108945198L;
+        @SuppressWarnings("serial") // Not statically typed as Serializable
         private final E[] a;
 
         ArrayList(E[] array) {
             a = Objects.requireNonNull(array);
         }