public String toString() {
      String sb = username;
      sb += "[overall:";
      sb += lvls[0];
      sb += ",";
      sb += ranks[0];
      sb += ",";
      sb += exps[0];
      sb += " ";
      for (int i = 0; i < lvls.length - 1; i++) {
        sb += Skills.SKILL_NAMES[i];
        sb += ":";
        sb += lvls[i + 1];
        sb += ",";
        sb += ranks[i + 1];
        sb += ",";
        sb +=exps[i + 1];
        sb += " ";
      }
      return sb.replaceFirst("\\s+$", "]");
    }