import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class sendSMS {
  public String sendSms() {
    try {
      // Construct data
      String apiKey     = "apikey=" + URLEncoder.encode("yourapiKey", "UTF-8");
      String message    = "&message=" + URLEncoder.encode("This is your message", "UTF-8");
      String sender     = "&sender=" + URLEncoder.encode("SmartSMS", "UTF-8");
      String phone      = "&phone=" + URLEncoder.encode("923331234567,923001234567,923451234567", "UTF-8");

      // Send data
      String data = "https://www.hajanaone.com/api/sendsms.php?" + apiKey + phone + message + sender;
      URL url = new URL(data);
      URLConnection conn = url.openConnection();
      conn.setDoOutput(true);

      // Get the response
      BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      String line;
      String sResult = "";
      while ((line = rd.readLine()) != null) {
        // Process line...
        sResult = sResult + line + " ";
      }
      rd.close();

      return sResult;
    } catch (Exception e) {
      System.out.println("Error SMS " + e);
      return "Error " + e;
    }
  }
}                       
                                            
                                        
                                    

                                        
                                        

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class sendSMS {
  public String sendSms() {
    try {
      // Construct data
      String apiKey  = "apikey=" + "yourapiKey";
      String message = "&message=" + "This is your message";
      String sender  = "&sender=" + "SmartSMS";
      String phone   = "&phone=" + "923336451234,923001234567,923451234567";

      // Send data
      HttpURLConnection conn = (HttpURLConnection) new URL("https://www.hajanaone.com/api/sendsms.php?").openConnection();
      String data = apiKey + phone + message + sender;
      conn.setDoOutput(true);
      conn.setRequestMethod("POST");
      conn.setRequestProperty("Content-Length", Integer.toString(data.length()));
      conn.getOutputStream().write(data.getBytes("UTF-8"));
      final BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
      final StringBuffer stringBuffer = new StringBuffer();
      String line;
      while ((line = rd.readLine()) != null) {
        stringBuffer.append(line);
      }
      rd.close();

      return stringBuffer.toString();
    } catch (Exception e) {
      System.out.println("Error SMS " + e);
      return "Error " + e;
    }
  }
}