src/java.base/share/classes/java/lang/Character.java

*** 8291,8300 ****
--- 8291,8301 ----
       * @serial
       */
      private final char value;
  
      /** use serialVersionUID from JDK 1.0.2 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = 3786198910865385080L;
  
      /**
       * Constructs a newly allocated {@code Character} object that
       * represents the specified {@code char} value.