for (IRCUser user = users; users != null; user = user.next)
for (IRCUser user = users; user != null; user = user.next)
  boolean userInChannel(String nick) {	  for (IRCUser user = users; users != null; user = user.next)		  if (user.name.equalsIgnoreCase(nick))			  return true;	  return false;  }