Enumeration enum = m_Train.enumerateInstances();
  public void buildClassifier(Instances instances) throws Exception {    String debug = "(KStar.buildClassifier) ";    if (instances.classIndex() < 0)      throw new Exception ("No class attribute assigned to instances");    if (instances.checkForStringAttributes())      throw new Exception("Can't handle string attributes!");    m_Train = new Instances(instances, 0, instances.numInstances());    Enumeration enum = m_Train.enumerateInstances();    // Throw away training instances with missing class    m_Train.deleteWithMissingClass();    // initializes class attributes ** java-speaking! :-) **    init_m_Attributes();  }