Send Sms java without thirdparty gateway

Question

I am trying to send an sms from my mobile number to another number using a java program, I am not allowed to use any third party gateways . My code as follows:

import java.net.*; 
import java.io.*; 
import javax.swing.*; 
import javax.net.ssl.HttpsURLConnection; 


class SendSMS 
{ 

public static void main(String args[]) 
{ 
boolean debug=true; 

String phone    ="10 digit number"; 
String message  ="hi"; 
String ppgHost  ="http://localhost:8800/"; 
String username ="";
String password ="";

try
{ 
phone=URLEncoder.encode("8366xxx", "UTF-8"); 

if(debug) 
System.out.println("phone------>"+phone); 
message=URLEncoder.encode("SendMsg via Now.SMS", "UTF-8"); 

if(debug) 
System.out.println("message---->"+message); 
} 
catch (UnsupportedEncodingException e) 
{ 
System.out.println("Encoding not supported"); 
} 

String url_str=ppgHost+"?PhoneNumber="+phone+"&Text="+message; 
//String url_str=ppgHost+"?user="+username+"&password="+password+"&PhoneNumber="+phone+"&Text="+message; 

if(debug) 
System.out.println("url string->"+url_str); 


try
{   
URL url2=new URL(url_str); 

HttpURLConnection connection = (HttpURLConnection) url2.openConnection(); 
connection.setDoOutput(false); 
connection.setDoInput(true); 

if(debug) 
System.out.println("Opened Con->"+connection); 

String res=connection.getResponseMessage(); 

if(debug) 
System.out.println("Get Resp ->"+res); 

int code = connection.getResponseCode () ; 

if ( code == HttpURLConnection.HTTP_OK ) 
{ 
connection.disconnect() ; 
}
}
catch(IOException e)
{
System.out.println("unable to create new url"+e.getMessage());
}

}
}

Please guide me guys. I connected my mobile using data cable into my system and tried to send but I am getting the error as follows:

C:\SMS>java SendSMS
phone------>8366xxx
message---->SendMsg+via+Now.SMS
url string->http://localhost:8800/?PhoneNumber=8366xxx&Text=SendMsg+via+Now.SMS
Opened Con->sun.net.www.protocol.http.HttpURLConnection:http://localhost:8800/?P
honeNumber=8366xxx&Text=SendMsg+via+Now.SMS
unable to create new urlConnection refused: connect

Please help guys

• I do not want to use any third party gateway
• The amount of sms will be used from my mobile balance

What I doing wrong here? I am new to this. Almost all the examples are given are using third party libraries and gateways. Help guys!