private static String[] cvsField(String line){    List<String> fields = new LinkedList<>();    char[] alpah = line.toCharArray();    boolean isFieldStart = true;    int pos = 0; int len = 0; boolean yinhao = false;    for(char c : alpah){      if(isFieldStart){        len = 0;        isFieldStart = false;      }      if(c == '/"'){        yinhao = !yinhao;      }      if(c == ',' && !yinhao){        fields.add(new String(alpah, pos - len, len));        isFieldStart = true;      }      pos++; len++;    }    return fields.toArray(new String[0]);  }