smslib for Java : Error for sending message example

Question

I installed library smslib in my windows machine. I followed all the instructions at the website smslib.org for library setup. But when I'm trying to run the SendMessage example got an error.

    package examples.modem;

    import org.smslib.AGateway;
    import org.smslib.IOutboundMessageNotification;
    import org.smslib.Library;
    import org.smslib.OutboundMessage;
    import org.smslib.Service;
    import org.smslib.modem.SerialModemGateway;

    public class SendMessage
    {
        public void doIt() throws Exception
        {

            OutboundNotification outboundNotification = new OutboundNotification();
            System.out.println("Example: Send message from a serial gsm modem.");
            System.out.println(Library.getLibraryDescription());
            System.out.println("Version: " + Library.getLibraryVersion());
            SerialModemGateway gateway = new SerialModemGateway("modem.com1", "COM12", 115200, "Huawei", "E303");
            gateway.setInbound(true);
            gateway.setOutbound(true);
            gateway.setSimPin("0000");
            // Explicit SMSC address set is required for some modems.
            // Below is for VODAFONE GREECE - be sure to set your own!
            gateway.setSmscNumber("+xxxxxxxxxxx");
            Service.getInstance().setOutboundMessageNotification(outboundNotification);
            Service.getInstance().addGateway(gateway);
            Service.getInstance().startService();
            System.out.println();
            System.out.println("Modem Information:");
            System.out.println("  Manufacturer: " + gateway.getManufacturer());
            System.out.println("  Model: " + gateway.getModel());
            System.out.println("  Serial No: " + gateway.getSerialNo());
            System.out.println("  SIM IMSI: " + gateway.getImsi());
            System.out.println("  Signal Level: " + gateway.getSignalLevel() + " dBm");
            System.out.println("  Battery Level: " + gateway.getBatteryLevel() + "%");
            System.out.println();
            // Send a message synchronously.
            OutboundMessage msg = new OutboundMessage("xxxxxxxxx", "Hello from SMSLib!");
            Service.getInstance().sendMessage(msg);
            System.out.println(msg);
            // Or, send out a WAP SI message.
            //OutboundWapSIMessage wapMsg = new OutboundWapSIMessage("xxxxxxxx",  new URL("http://www.smslib.org/"), "Visit SMSLib now!");
            //Service.getInstance().sendMessage(wapMsg);
            //System.out.println(wapMsg);
            // You can also queue some asynchronous messages to see how the callbacks
            // are called...
            //msg = new OutboundMessage("xxxxxxxxxxx", "Wrong number!");
            //srv.queueMessage(msg, gateway.getGatewayId());
            //msg = new OutboundMessage("308888888888", "Wrong number!");
            //srv.queueMessage(msg, gateway.getGatewayId());
            System.out.println("Now Sleeping - Hit <enter> to terminate.");
            System.in.read();
            Service.getInstance().stopService();
        }

          public class OutboundNotification implements IOutboundMessageNotification
    {
        public void process(AGateway gateway, OutboundMessage msg)
        {
            System.out.println("Outbound handler called from Gateway: " + gateway.getGatewayId());
            System.out.println(msg);
        }
    }

    public static void main(String args[])
    {
        SendMessage app = new SendMessage();
        try
        {
            app.doIt();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}

error:

Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
The method getInstance() is undefined for the type Service
The method getInstance() is undefined for the type Service
The method getInstance() is undefined for the type Service
The method getInstance() is undefined for the type Service
The method getInstance() is undefined for the type Service

at examples.modem.SendMessage.doIt(SendMessage.java:34)
at examples.modem.SendMessage.main(SendMessage.java:79)

Can any one please help me with this?

Answer 1

checklist :-

• add javax.comm.properties,
• Win32.dll file (these you need to talk to your modem)
• smslib jar
• Make sure you have a compatible modem. The android smartphones dont work. you either need some specific old school models with inbuilt modem or a usb-GSM modem.
• Are there other classes in your package?