src/java.base/share/classes/java/io/FilePermission.java

*** 193,202 ****
--- 193,203 ----
  //        }
  //        sb.append("***\n");
  //        return sb.toString();
  //    }
  
+     @java.io.Serial
      private static final long serialVersionUID = 7930732926638008763L;
  
      /**
       * Use the platform's default file system to avoid recursive initialization
       * issues when the VM is configured to use a custom file system provider.
*** 1038,1047 ****
--- 1039,1049 ----
      /**
       * WriteObject is called to save the state of the FilePermission
       * to a stream. The actions are serialized, and the superclass
       * takes care of the name.
       */
+     @java.io.Serial
      private void writeObject(ObjectOutputStream s)
          throws IOException
      {
          // Write out the actions. The superclass takes care of the name
          // call getActions to make sure actions field is initialized
*** 1052,1061 ****
--- 1054,1064 ----
  
      /**
       * readObject is called to restore the state of the FilePermission from
       * a stream.
       */
+     @java.io.Serial
      private void readObject(ObjectInputStream s)
           throws IOException, ClassNotFoundException
      {
          // Read in the actions, then restore everything else by calling init.
          s.defaultReadObject();
*** 1208,1227 ****
--- 1211,1232 ----
      @Override
      public Enumeration<Permission> elements() {
          return perms.elements();
      }
  
+     @java.io.Serial
      private static final long serialVersionUID = 2202956749081564585L;
  
      // Need to maintain serialization interoperability with earlier releases,
      // which had the serializable field:
      //    private Vector permissions;
  
      /**
       * @serialField permissions java.util.Vector
       *     A list of FilePermission objects.
       */
+     @java.io.Serial
      private static final ObjectStreamField[] serialPersistentFields = {
          new ObjectStreamField("permissions", Vector.class),
      };
  
      /**
*** 1229,1238 ****
--- 1234,1244 ----
       */
      /*
       * Writes the contents of the perms field out as a Vector for
       * serialization compatibility with earlier releases.
       */
+     @java.io.Serial
      private void writeObject(ObjectOutputStream out) throws IOException {
          // Don't call out.defaultWriteObject()
  
          // Write out Vector
          Vector<Permission> permissions = new Vector<>(perms.values());
*** 1243,1252 ****
--- 1249,1259 ----
      }
  
      /*
       * Reads in a Vector of FilePermissions and saves them in the perms field.
       */
+     @java.io.Serial
      private void readObject(ObjectInputStream in)
          throws IOException, ClassNotFoundException
      {
          // Don't call defaultReadObject()