public String toString() {
    StringBuffer buff = new StringBuffer();
    for (int i = 0; i < c && i < view.length; i ++) {
      buff.append(((view[i] != null) ? view[i].toString() :  "null"));
      if (i < c - 1 && i < view.length - 1) {
        buff.append(",");
      }
    }
    return buff.toString();
  }