src/java.base/share/classes/sun/util/BuddhistCalendar.java

@@ -37,10 +37,11 @@
 
 //////////////////
 // Class Variables
 //////////////////
 
+    @java.io.Serial
     private static final long serialVersionUID = -8527488697350388578L;
 
     private static final int BUDDHIST_YEAR_OFFSET = 543;
 
 ///////////////

@@ -252,10 +253,11 @@
         return sb.toString();
     }
 
     private transient int yearOffset = BUDDHIST_YEAR_OFFSET;
 
+    @java.io.Serial
     private void readObject(ObjectInputStream stream)
         throws IOException, ClassNotFoundException {
         stream.defaultReadObject();
         yearOffset = BUDDHIST_YEAR_OFFSET;
     }