--- a/src/java.base/share/classes/java/util/HashSet.java Thu Aug 29 18:52:30 2019 -0400
+++ b/src/java.base/share/classes/java/util/HashSet.java Thu Aug 29 16:31:34 2019 -0700
@@ -91,6 +91,7 @@
extends AbstractSet<E>
implements Set<E>, Cloneable, java.io.Serializable
{
+ @java.io.Serial
static final long serialVersionUID = -5024744406713321676L;
private transient HashMap<E,Object> map;
@@ -271,6 +272,7 @@
* (int), followed by all of its elements (each an Object) in
* no particular order.
*/
+ @java.io.Serial
private void writeObject(java.io.ObjectOutputStream s)
throws java.io.IOException {
// Write out any hidden serialization magic
@@ -292,6 +294,7 @@
* Reconstitute the {@code HashSet} instance from a stream (that is,
* deserialize it).
*/
+ @java.io.Serial
private void readObject(java.io.ObjectInputStream s)
throws java.io.IOException, ClassNotFoundException {
// Read in any hidden serialization magic