--- jsr166/src/main/java/util/ArrayList.java	2019/08/10 16:48:05	1.68
+++ jsr166/src/main/java/util/ArrayList.java	2019/08/30 18:05:39	1.69
@@ -109,6 +109,7 @@ import jdk.internal.util.ArraysSupport;
 public class ArrayList<E> extends AbstractList<E>
         implements List<E>, RandomAccess, Cloneable, java.io.Serializable
 {
+    // OPENJDK @java.io.Serial
     private static final long serialVersionUID = 8683452581122892189L;
 
     /**
@@ -855,6 +856,7 @@ public class ArrayList<E> extends Abstra
      *             instance is emitted (int), followed by all of its elements
      *             (each an {@code Object}) in the proper order.
      */
+    // OPENJDK @java.io.Serial
     private void writeObject(java.io.ObjectOutputStream s)
         throws java.io.IOException {
         // Write out element count, and any hidden stuff
@@ -882,6 +884,7 @@ public class ArrayList<E> extends Abstra
      *         could not be found
      * @throws java.io.IOException if an I/O error occurs
      */
+    // OPENJDK @java.io.Serial
     private void readObject(java.io.ObjectInputStream s)
         throws java.io.IOException, ClassNotFoundException {