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

@@ -8291,10 +8291,11 @@
      * @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.