src/java.base/share/classes/java/util/Currency.java

@@ -111,10 +111,11 @@
  * @see java.math.BigDecimal
  * @since 1.4
  */
 public final class Currency implements Serializable {
 
+    @java.io.Serial
     private static final long serialVersionUID = -158308464356906721L;
 
     /**
      * ISO 4217 currency code for this currency.
      *

@@ -659,10 +660,11 @@
     }
 
     /**
      * Resolves instances being deserialized to a single instance per currency.
      */
+    @java.io.Serial
     private Object readResolve() {
         return getInstance(currencyCode);
     }
 
     /**