Added Currency Convertor Java Project

Author: Avadhut-Shedage

currency Convertor/currency.java

@@ -0,0 +1,127 @@
+/*
+* 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>
+}