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

*** 122,131 ****
--- 122,132 ----
       * @serial
       */
      protected int capacityIncrement;
  
      /** use serialVersionUID from JDK 1.0.2 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = -2767605614048989439L;
  
      /**
       * Constructs an empty vector with the specified initial capacity and
       * capacity increment.
*** 1147,1156 ****
--- 1148,1158 ----
       * @param in the stream
       * @throws java.io.IOException if an I/O error occurs
       * @throws ClassNotFoundException if the stream contains data
       *         of a non-existing class
       */
+     @java.io.Serial
      private void readObject(ObjectInputStream in)
              throws IOException, ClassNotFoundException {
          ObjectInputStream.GetField gfields = in.readFields();
          int count = gfields.get("elementCount", 0);
          Object[] data = (Object[])gfields.get("elementData", null);
*** 1168,1177 ****
--- 1170,1180 ----
       * of the serialized data.
       *
       * @param s the stream
       * @throws java.io.IOException if an I/O error occurs
       */
+     @java.io.Serial
      private void writeObject(java.io.ObjectOutputStream s)
              throws java.io.IOException {
          final java.io.ObjectOutputStream.PutField fields = s.putFields();
          final Object[] data;
          synchronized (this) {