SerialAnnotationUsedOnWrongMember - Intellij Community

Reports methods and fields in the Serializable and Externalizable classes that are not suitable to be annotated with the java.io.Serial annotation.

Examples:

class Test implements Serializable {
  @Serial // The annotated field is not a part of serialization mechanism because it's not final
  private static long serialVersionUID = 7874493593505141603L;

  @Serial // The annotated method is not a part of the serialization mechanism because it's not private
  void writeObject(ObjectOutputStream out) throws IOException {
  }
}

class Test implements Externalizable {
  @Serial // The annotated method is not a part of the serialization mechanism as it's inside Externalizable class
  private void writeObject(ObjectOutputStream out) throws IOException {
  }
}

For information about all valid cases, refer to the Javadoc of the java.io.Serial class.

New in 2020.3