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

@@ -149,10 +149,11 @@
  *
  * @since 1.8
  */
 public final class URLPermission extends Permission {
 
+    @java.io.Serial
     private static final long serialVersionUID = -2702463814894478682L;
 
     private transient String scheme;
     private transient String ssp;                 // scheme specific part
     private transient String path;

@@ -503,10 +504,11 @@
     }
 
     /**
      * restore the state of this object from stream
      */
+    @java.io.Serial
     private void readObject(ObjectInputStream s)
         throws IOException, ClassNotFoundException {
         ObjectInputStream.GetField fields = s.readFields();
         String actions = (String)fields.get("actions", null);