PAYZA sendMoney API in JAVA

/**
 *
 * SendMoneyClient
 *
 * A class which facilitates the interaction with Payza's
 * SendMoney API. SendMoneyClient class allows user to create
 * the data to be sent to the API in the correct format and
 * retrieve the response.
 *
 *
 * THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE.
 *
 * @author Javanian
 * @copyright 2013
 */
package payza;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

class SendMoneyClient
{
        //The API's response varialbles
    private String response;

    public String getResponse()
    {
        return response;
    }
    public void setResponse(String value)
    {
        response = value;
    }
        //The server address of the SendMoney API
    private String server;

    public String getServer()
    {
        return server;
    }
    public void setServer(String value)
    {
        server = value;
    }
        //The exact URL of the SendMoney API
    private String url;

    public String getUrl()
    {
        return url;
    }
    public void setUrl(String value)
    {
        url = value;
    }
        //Your payza name which is your username
    private String myUserName;

    public String getMyUserName()
    {
        return myUserName;
    }
    public void setMyUserName(String value)
    {
        myUserName = value;
    }
        //Your API password that is generated from your payza account
    private String apiPassword;

    public String getApiPassword()
    {
        return myUserName;
    }
    public void setApiPassword(String value)
    {
        apiPassword = value;
    }
        //The data that will be sent to the sendMoney API
        private String dataToSend;
        public String getDataToSend()
    {
        return dataToSend;
    }
    public void setDataToSend(String value)
    {
                dataToSend = value;
    }
        //constructor
        public SendMoneyClient(String strUsername, String strPassword)
        {
             myUserName = strUsername;
            apiPassword = strPassword;
            dataToSend =    null;
        }

        /*
         * SendMoneyClient::buildPostVariables()
         *
         * Builds an URL encoded post string which contains the variables to be
         * sent to the API in the correct format.
         *
         * @param string $strAmountPaid Payment amount.
         * @param string $strCurrency 3 letter ISO-4217 currency code.
         * @param string $strReceiverEmail  Recipient's email address.
         * @param string $strSenderEmail Your secondary email (optional).
         * @param string $strPurchaseType A valid purchase type code.
         * @param string $strNote Note that you would like to send to the recipient.
         * @param string $strTestMode Test mode status.
         *
         * @return string The URL encoded post string
         */
         public String BuildPostVariables(String strAmountPaid, String strCurrency, String strReceiverEmail, String strSenderEmail,
            String strPurchaseType, String strNote, String strTestMode)
         {
             StringBuilder sbDataToSend = new StringBuilder();

            sbDataToSend.append("USER=").append(java.net.URLEncoder.encode(myUserName));
            sbDataToSend.append("&PASSWORD=").append(java.net.URLEncoder.encode(apiPassword));
            sbDataToSend.append("&AMOUNT=").append(java.net.URLEncoder.encode((String)strAmountPaid));
            sbDataToSend.append("&CURRENCY=").append(java.net.URLEncoder.encode((String)strCurrency));
            sbDataToSend.append("&RECEIVEREMAIL=").append(java.net.URLEncoder.encode((String)strReceiverEmail));
            sbDataToSend.append("&SENDEREMAIL=").append(java.net.URLEncoder.encode((String)strSenderEmail));
            sbDataToSend.append("&PURCHASETYPE=").append(java.net.URLEncoder.encode((String)strPurchaseType));
            sbDataToSend.append("&NOTE=").append(java.net.URLEncoder.encode((String)strNote));
            sbDataToSend.append("&TESTMODE=").append(java.net.URLEncoder.encode((String)strTestMode));
            dataToSend = sbDataToSend.toString();
            setDataToSend(sbDataToSend.toString());
            return dataToSend;
         }
         public String PostData()
         {
                String response = null;
                URL url;
                HttpURLConnection urlConn;
                DataOutputStream wr = null;
                try
                {
                    // send the post
                    url = new URL(getServer().concat(getUrl()));
                    urlConn=(HttpURLConnection)url.openConnection();
                    urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
                    urlConn.setDoInput(true);
                    urlConn.setDoOutput(true);
                    urlConn.setUseCaches(false);
                    urlConn.setRequestMethod("POST");
                    urlConn.setRequestProperty("Content-Length", Integer.toString(dataToSend.length()));
                    urlConn.connect();

                    wr = new DataOutputStream(urlConn.getOutputStream());
                    wr.writeBytes(dataToSend);
                    wr.close();


                    // read the response
                    BufferedReader sr = new BufferedReader( new InputStreamReader(urlConn.getInputStream()));

                    String result = "";
                    String strTemp = "";
                    boolean flag = true;
                    while (flag)
                    {
                        strTemp = sr.readLine();
                        if (strTemp != null)
                        {
                            result += strTemp;
                        }
                        else
                        {
                            flag = false;
                        }
                    }

                    response = result;
                    // decode the response string
                    response = java.net.URLDecoder.decode(response);
                    sr.close();
            }
            catch(MalformedURLException ex)
            {
                System.err.println("Error: " + ex.getMessage());
            }
            catch (Exception ex)
            {
                System.err.println("Error: " + ex.getMessage());
            }
            finally
            {
                if (wr != null)
                {   try
                    {
                        wr.close();
                    }
                    catch (Exception ex)
                    {
                        System.err.println("Error: " + ex.getMessage());
                    }
                }

            return response;
        }

    }
}
    class SendMoneyClientTest
    {
        public static void main(String[] args)
        {
            /*
             * test SendMoney API
             */
            SendMoneyClient objSendMoneyClient = new SendMoneyClient("[email protected]", "XXXXXXXX");
            objSendMoneyClient.setServer("https://api.payza.com");
            objSendMoneyClient.setUrl("/svc/api.svc/sendmoney");
            String strPostString = objSendMoneyClient.BuildPostVariables("1.11", "USD", "[email protected]", "", "1", "this is a test", "1");
            objSendMoneyClient.setResponse(objSendMoneyClient.PostData());
            System.out.println("Result: " + objSendMoneyClient.getResponse());
        }
    }