DescriptionUtils { public static String createNumericalDescription(double min, double max) { return min + "," + max; } private  DescriptionUtils(); static String createNumericalDescription(double min, double max); static String createNominalDescription(Collection<String> values); static double[] extractNumericalRange(String description); static void extractNominalValues(String description,
                                          Collection<String> target);  }
@Test public void testCreateNumericalDescription() { String description = DescriptionUtils.createNumericalDescription(-5.1, 12.32); assertEquals("-5.1,12.32", description); }