public void addUser(String name, String address, String peerID, int i) {
   UserInfo info = new UserInfo();
   info.setAddress(address.trim());
   info.setPeerID(peerID);
   info.setName(name);
   info.setStatus(i);
   if (chUsers.containsKey(address.trim())) chUsers.remove(address);
   chUsers.put(address.trim(), info);
 }
 private UserInfo mkUserInfo(Element user) {
   UserInfo info = new UserInfo();
   String name = user.getChildText("name");
   String address = user.getChildText("email");
   String peerid = user.getChildText("peerid");
   String status = user.getChildText("status");
   if (status == null) status = "0";
   info.setAddress(address);
   info.setPeerID(peerid);
   info.setName(name);
   info.setStatus(Integer.parseInt(status));
   return info;
 }