javax.obex.ClientSession.get()

following code for reading server file using bluetooth

package phone; /*original imports */ import java.io.*; import java.util.*; import javax.microedition.io.*; /* switch of J2se netbeans dev kit */ import javax.bluetooth.*; // import javax.obex.*;

/* add the de.aventna obex */ import de.avetana.bluetooth.obex.OBEXConnection; import de.avetana.bluetooth.obex.HeaderSetImpl; import de.avetana.bluetooth.obex.CommandHandler; import de.avetana.bluetooth.obex.MD5; import de.avetana.bluetooth.obex.OperationImpl; import de.avetana.bluetooth.obex.SessionNotifierImpl; import de.avetana.javax.obex.Authenticator; import de.avetana.javax.obex.ClientSession; import de.avetana.javax.obex.HeaderSet; import de.avetana.javax.obex.Operation; import de.avetana.javax.obex.PasswordAuthentication; import de.avetana.javax.obex.ResponseCodes; import de.avetana.javax.obex.ServerRequestHandler; import de.avetana.javax.obex.ServiceRegistrationException; import de.avetana.javax.obex.SessionNotifier;

class FTClient implements DiscoveryListener { LocalDevice local = null; DiscoveryAgent agent = null; int[] attrSet = null; RemoteDevice btDev = null; String serviceURL = null; ClientSession con = null; HeaderSet hdr = null;

public FTClient() throws BluetoothStateException{

   // initialize the stack, if needed
  local = LocalDevice.getLocalDevice();
      agent = local.getDiscoveryAgent();
      agent.startInquiry(DiscoveryAgent.GIAC, this);
}

public void deviceDiscovered(RemoteDevice btDevice,DeviceClass cod){
      btDev = btDevice;
      System.out.println("Device discovered " + 
     btDevice.getBluetoothAddress());
}

public void servicesDiscovered(int transID, ServiceRecord[] servRecord){
      System.out.println("Discovered a service ....");
      for(int i =0; i < servRecord.length; i++){
         serviceURL = 
     servRecord[i].getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT,
        true);  
         System.out.println("The service URL is " + serviceURL);    
      }
}

public void serviceSearchCompleted(int transID, int respCode)
{
      System.out.println("Service search completed ........... ");
      System.out.println("Opening a connection with the server ....");

      try
      {
        con = (ClientSession)Connector.open(serviceURL);
        hdr = con.connect(hdr);
        System.out.println("Response code of the server after connect..." +
         hdr.getResponseCode());
        //Sending a request to server for file Hello.txt
        hdr = con.createHeaderSet(); 
        hdr.setHeader(HeaderSet.TYPE,"text/vCard");
        hdr.setHeader(HeaderSet.NAME,"Hello.txt");
        Operation op = con.get(hdr);

        //The server is now sending the file 
        InputStream in = op.openInputStream();

        // Writing the file from server to local file system. 
    StreamConnection filestream = 
       (StreamConnection)Connector.open("file://name=HelloFile.txt;mode=w");
    OutputStream out = filestream.openOutputStream();

       //read and write the data
               int data = in.read();
               while(data != -1)
               {
                  out.write((byte)data);
                  data = in.read();
               }


      op.close();
       in.close();
       out.close();
     }
     catch(IOException e){
        System.out.println(e.getMessage());
     }
}


public void inquiryCompleted(int discType)
{
      System.out.println("Inquiry completed ... ");
      UUID[] uuids = new UUID[1];
   uuids[0] = new UUID("1106",true);
   try{
      if(btDev == null){
       System.out.println("No device has been discovered, " +
         "hence not worth proceeding exiting .... ");
       System.exit(1);
       }
       System.out.println("Now searching for services ........ ");  
       agent.searchServices(attrSet, uuids, btDev, this);
    }
    catch(BluetoothStateException e) {System.out.println(e.getMessage());}
}


public static void main(String args[]) throws IOException {
      FTClient client = new FTClient();
}

}

/*Operation op = con.get(hdr); */

here Operation op = con.get(hdr); get() method throwing IOEexception

how to handle that exception