host=host.trim();
    private ArrayList createInitialHosts(String l) throws UnknownHostException {        StringTokenizer tok=new StringTokenizer(l, ",");        String          t;        IpAddress       addr;        ArrayList       retval=new ArrayList();        while(tok.hasMoreTokens()) {            try {                t=tok.nextToken();                String host=t.substring(0, t.indexOf('['));                int port=Integer.parseInt(t.substring(t.indexOf('[') + 1, t.indexOf(']')));                for(int i=port; i < port + port_range; i++) {                    addr=new IpAddress(host, i);                    retval.add(addr);                }            }            catch(NumberFormatException e) {                if(log.isErrorEnabled()) log.error("exeption is " + e);            }        }        return retval;    }