public static void main(String[] args) {
        // TODO code application logic here

        ConnectionConfiguration connectionConfig = new ConnectionConfiguration("192.168.11.159", 5222);
        XMPPConnection connection = new XMPPConnection(connectionConfig);

        for (int i=0;i<10000;i++) {
            try {
                Thread.sleep(1000);
                connection.connect();
                connection.login(args[0], args[1]);
                System.out.println("connected...("+i+")");
                Thread.sleep(9000);
                Presence presence = new Presence(Presence.Type.unavailable);
                connection.sendPacket(presence);
                connection.disconnect();
                System.out.println("disconnected...");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }