src/java.base/share/classes/java/net/InetSocketAddress.java

*** 134,143 ****
--- 134,144 ----
          }
      }
  
      private final transient InetSocketAddressHolder holder;
  
+     @java.io.Serial
      private static final long serialVersionUID = 5076001401234631237L;
  
      private static int checkPort(int port) {
          if (port < 0 || port > 0xFFFF)
              throw new IllegalArgumentException("port out of range:" + port);
*** 257,271 ****
--- 258,274 ----
      /**
       * @serialField hostname String
       * @serialField addr InetAddress
       * @serialField port int
       */
+     @java.io.Serial
      private static final ObjectStreamField[] serialPersistentFields = {
           new ObjectStreamField("hostname", String.class),
           new ObjectStreamField("addr", InetAddress.class),
           new ObjectStreamField("port", int.class)};
  
+     @java.io.Serial
      private void writeObject(ObjectOutputStream out)
          throws IOException
      {
          // Don't call defaultWriteObject()
           ObjectOutputStream.PutField pfields = out.putFields();
*** 273,282 ****
--- 276,286 ----
           pfields.put("addr", holder.addr);
           pfields.put("port", holder.port);
           out.writeFields();
       }
  
+     @java.io.Serial
      private void readObject(ObjectInputStream in)
          throws IOException, ClassNotFoundException
      {
          // Don't call defaultReadObject()
          ObjectInputStream.GetField oisFields = in.readFields();
*** 294,303 ****
--- 298,308 ----
                                                                  oisAddr,
                                                                  oisPort);
          UNSAFE.putReference(this, FIELDS_OFFSET, h);
      }
  
+     @java.io.Serial
      private void readObjectNoData()
          throws ObjectStreamException
      {
          throw new InvalidObjectException("Stream data required");
      }