Things are getting even worse. Mark has now asked us to add a new filter that filters melons by type and weight, and he needs this quickly. However, the quickest implementation is the ugliest. Check it out:

public static List<Melon> filterByTypeAndWeight(
    List<Melon> melons, String type, int weight) {
  List<Melon> result = new ArrayList<>();

  for (Melon melon: melons) {
    if (melon != null && type.equalsIgnoreCase(melon.getType()) 
        && melon.getWeight() == weight) {
      result.add(melon);
    }
  }

  return result;
}

In our context, this is unacceptable. If we add a new filter criterion here, the code will become hard to maintain as well as prone to errors.