public int findEngineByRoadNumber(String roadNumber){
  if (sysList != null) {
    if (!roadNumber.equals(_roadNumber)) {
      return getIndex(0,roadNumber);
    }
    int index=getIndex(_index,roadNumber);
    if (index > 0) {
      return index;
    }
    return getIndex(0,roadNumber);
  }
  return -1;
}

public int findEngineByRoadNumber ( String roadNumber ) { if ( sysList != null ) { if ( ! roadNumber . equals ( _roadNumber ) ) { return getIndex ( 0 , roadNumber ) ; } int index = getIndex ( _index , roadNumber ) ; if ( index > 0 ) { return index ; } return getIndex ( 0 , roadNumber ) ; } return - 1 ; }
search for engine by road number
