commons lang: Comparisons with null support

[Sualeh Fatehi]

I have not done an extensive search of the mailing list archives, but I was
wondering if something like the following comparison functions with support
for null values may be useful in commons lang StringUtils (and also
DateUtils and NumberUtils):

public static int compare(String left, String right) {
  if (left == right) {
    return 0;
  }
  if (left == null) {
    return -1;
  }
  if (right == null) {
    return 1;
  }
  return left.compareTo(right);
}

Sualeh.

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