Reports Serializable classes whose closest non-serializable ancestor doesn't have a no-argument constructor. Such classes cannot be deserialized and will fail with an InvalidClassException.

Example:


  class Ancestor {
    private String name;
    Ancestor(String name) {
      this.name = name;
    }
  }

  // warning on this class because the superclass is not
  // serializable, and its constructor takes arguments
  class Descendant extends Ancestor implements Serializable {
    Descendant() {
      super("Bob");
    }
  }