java:S1695 false positive for Comparable::compareTo

Clean Code Report False-positive / False-negative...
1
  • What language is this for? java
  • Which rule? “NullPointerException” should not be explicitly thrown [S1695]
  • Why do you believe it’s a false-positive/false-negative? The contract for Comparable requires a NullPointerException should be thrown if the input is null.
  • Are you using
    • SonarQube - v10.6 (92116)
  • How can we reproduce the problem?

class ComparableClass implements Comparable<ComparableClass> {
  @Override
  public int compareTo(@Nullable ComparableClass o) {
    if (o == null) {
      throw new NullPointerException("Cannot compare to null");
    }
    return 0;
  }
}

interface ComparableInterface extends Comparable<ComparableInterface> {
  @Override
  default int compareTo(@Nullable ComparableInterface o) {
    if (o == null) {
      throw new NullPointerException("Cannot compare to null");
    }
    return 0;
  }
}