src/java.base/share/classes/java/net/Inet4Address.java

*** 87,96 ****
--- 87,97 ----
      static final int INADDRSZ = 4;
  
      /** use serialVersionUID from InetAddress, but Inet4Address instance
       *  is always replaced by an InetAddress instance before being
       *  serialized */
+     @java.io.Serial
      private static final long serialVersionUID = 3286316764910316507L;
  
      /*
       * Perform initializations.
       */
*** 132,141 ****
--- 133,143 ----
       * @return the alternate object to be serialized.
       *
       * @throws ObjectStreamException if a new object replacing this
       * object could not be created
       */
+     @java.io.Serial
      private Object writeReplace() throws ObjectStreamException {
          // will replace the to be serialized 'this' object
          InetAddress inet = new InetAddress();
          inet.holder().hostName = holder().getHostName();
          inet.holder().address = holder().getAddress();