Currency converter (or currency exchange) is a mini project coded in Java programming language. This simple application provides a web-based interface for exchanging/converting money from one currency (say $) to another currency (say €).
The complete source code of currency exchange application can be downloaded from the link below. As this is just a mini project, project report and documentation are not available. You can go through the description below for project abstract.
Download Currency Converter Java Project with Source Code
[sociallocker]
Download Currency Converter Java Project with Source Code
[/sociallocker]
Currency Converter Project Abstract:
Different countries use different currency, and there is daily variation in these currencies relative to one another. Those who transfer money from one country to another (one currency to another) must be updated with the latest currency exchange rates in the market.
Currency converter mini project is built keeping this thing in mind. It is simply a calculator-like app developed using Ajax, Java servlets web features. In this application, there is regular update about currency of every country by which it displays present currency market value and conversion rate.
Such application can be used by any user, but it is mainly useful for business, shares, and finance related areas where money transfer and currency exchange takes place on a daily basis.
In this currency converter app, users are provided with an option to select the type of conversion, i.e. from “this” currency to “that” currency. This simple feature allows users to enter amount to be converted (say currency in Dollars), and display the converted amount (say currency in Euro).
Here’s a sample code of this mini project:
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package com.exchange;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.InputStream;
import java.net.*;
import com.google.gson.*;
/**
*
* @author pakallis
*/
class Recv
{
private String lhs;
private String rhs;
private String error;
private String icc;
public Recv()
{
}
public String getLhs()
{
return lhs;
}
public String getRhs()
{
return rhs;
}
}
public class Convert extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void processRequest(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String query = "";
String amount = "";
String curTo = "";
String curFrom = "";
String submit = "";
String res = "";
HttpSession session;
resp.setContentType("text/html;charset=UTF-8");
PrintWriter out = resp.getWriter();
/*Read request parameters*/
amount = req.getParameter("amount");
curTo = req.getParameter("to");
curFrom = req.getParameter("from");
/*Open a connection to google and read the result*/
try {
query = "http://www.google.com/ig/calculator?hl=en&q=" + amount + curFrom + "=?" + curTo;
URL url = new URL(query);
InputStreamReader stream = new InputStreamReader(url.openStream());
BufferedReader in = new BufferedReader(stream);
String str = "";
String temp = "";
while ((temp = in.readLine()) != null) {
str = str + temp;
}
/*Parse the result which is in json format*/
Gson gson = new Gson();
Recv st = gson.fromJson(str, Recv.class);
String rhs = st.getRhs();
rhs = rhs.replaceAll("�", "");
/*we do the check in order to print the additional word(millions,billions etc)*/
StringTokenizer strto = new StringTokenizer(rhs);
String nextToken;
out.write(strto.nextToken());
nextToken = strto.nextToken();
if( nextToken.equals("million") || nextToken.equals("billion") || nextToken.equals("trillion"))
{
out.println(" "+nextToken);
}
} catch (NumberFormatException e) {
out.println("The given amount is not a valid number");
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
The complete source code files are available in the download link. You can find more Java projects here.
