private void checkInterpolation() throws MathIllegalArgumentException {
  if (abscissae.isEmpty()) {
    throw new MathIllegalArgumentException(LocalizedCoreFormats.EMPTY_INTERPOLATION_SAMPLE);
  }
}

private void checkInterpolation ( ) throws MathIllegalArgumentException { if ( abscissae . isEmpty ( ) ) { throw new MathIllegalArgumentException ( LocalizedCoreFormats . EMPTY_INTERPOLATION_SAMPLE ) ; } }
check interpolation can be performed .
