How to send Text Messages in Blackberry?

<small>public final class HelloBlackBerryScreen extends MainScreen
{
	private BasicEditField basicEditField1, basicEditField2;
	private String addr = "9888919119";
	private String message = "This is a test message.";
    public HelloBlackBerryScreen()
    {      
    	super(MainScreen.VERTICAL_SCROLL | MainScreen.VERTICAL_SCROLLBAR);
        setTitle("Send SMS :");
        basicEditField1 = new BasicEditField("To : ", addr, 11, BasicEditField.EDITABLE);
        basicEditField2 = new BasicEditField("Message : ", message, 500, BasicEditField.EDITABLE);
        ButtonField buttonField_1 = new ButtonField("Send", ButtonField.CONSUME_CLICK | ButtonField.FIELD_HCENTER);
        buttonField_1.setChangeListener(new FieldChangeListener()
        {
            public void fieldChanged(Field arg0, int arg1) 
            {
                try 
                {
                    addr = basicEditField1.getText();
                    message = basicEditField2.getText();
                    sendSMS(addr, message);
                } 
                catch (Exception e) 
                {
                    e.printStackTrace();
                    System.out.println("Error send msg : " + e.toString());
                }
            }
        });
        this.add(basicEditField1);
        this.add(basicEditField2);
        this.add(buttonField_1);
    }
    private void sendSMS(final String no, final String msg) 
    {
        try 
        {
            new Thread() 
            {
                public void run() 
                {
                    if (RadioInfo.getNetworkType() == RadioInfo.NETWORK_CDMA) 
                    {
                        DatagramConnection dc = null;
                        try 
                        {
                            dc = (DatagramConnection) Connector.open("sms://" + no);
                            byte[] data = msg.getBytes();
                            Datagram dg = dc.newDatagram(dc.getMaximumLength());
                            dg.setData(data, 0, data.length);
                            dc.send(dg);
                            UiApplication.getUiApplication().invokeLater(new Runnable() 
                            {
                                public void run() 
                                {
                                    try 
                                    {
                                        System.out.println("Message Sent Successfully : Datagram");
                                        Dialog.alert("Message Sent Successfully : Datagram");
                                    }
                                    catch (Exception e) 
                                    {
                                        System.out.println("Exception **1 : " + e.toString());
                                        e.printStackTrace();
                                    }
                                }
                            });
                        }
                        catch (Exception e) 
                        {
                            System.out.println("Exception 1 : " + e.toString());
                            e.printStackTrace();
                        } 
                        finally 
                        {
                            try 
                            {
                                dc.close();
                                dc = null;
                            } 
                            catch (IOException e) 
                            {
                                System.out.println("Exception 2 : " + e.toString());
                                e.printStackTrace();
                            }
                        }
                    } 
                    else 
                    {
                        MessageConnection conn = null;
                        try 
                        {
                            conn = (MessageConnection) Connector.open("sms://" + no);
                            //generate a new text message
                            TextMessage tmsg = (TextMessage) conn.newMessage(MessageConnection.TEXT_MESSAGE);
                            //set the message text and the address
                            tmsg.setAddress("sms://" + no);
                            tmsg.setPayloadText(msg);
                            //finally send our message
                            conn.send(tmsg);
                            UiApplication.getUiApplication().invokeLater(new Runnable() 
                            {
                                public void run() 
                                {
                                    try 
                                    {
                                        System.out.println("Message Sent Successfully : TextMessage");
                                        Dialog.alert("Message Sent Successfully : TextMessage");
                                    } 
                                    catch (Exception e) 
                                    {
                                        System.out.println("Exception **1 : " + e.toString());
                                        e.printStackTrace();
                                    }
                                }
                            });
                        } 
                        catch (Exception e) 
                        {
                            System.out.println("Exception 3 : " + e.toString());
                            e.printStackTrace();
                        }
                        finally 
                        {
                            try 
                            {
                                conn.close();
                                conn = null;
                            } 
                            catch (IOException e) 
                            {
                                System.out.println("Exception 4 : " + e.toString());
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }.start();
        } 
        catch (Exception e) 
        {
            System.out.println("Exception 5 : " + e.toString());
            e.printStackTrace();
        }
    }
    protected boolean keyDown(int keycode, int status) 
    {
        if (Keypad.key(keycode) == Keypad.KEY_ESCAPE) 
        {
            close();
            return true;
        }
        return super.keyDown(keycode, status);
    }
}</small>