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

*** 135,141 ****
--- 135,142 ----
          }
          return -1;
      }
  
      /** use serialVersionUID from JDK 1.0.2 for interoperability */
+     @java.io.Serial
      private static final long serialVersionUID = 1224463164541339165L;
  }