Simple currency converter in JAVA

Here goes a simple JAVA code to convert rupees by using the online yahoo exchange rates.

Code:

package com.oksbwn.currencyRate;
import java.io.IOException;

import javax.swing.JOptionPane;

import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.*;

import com.oksbwn.popUp.popMe;

public class YahooCurrencyConverter
{ 
@SuppressWarnings({ "deprecation", "resource" })
public float convert(String currencyFrom, String currencyTo) throws IOException
 {  
    HttpClient httpclient = new DefaultHttpClient();  
 HttpGet httpGet = new HttpGet("http://quote.yahoo.com/d/quotes.csv?s=" + currencyFrom + currencyTo + "=X&f=l1&e=.csv"); 
 ResponseHandler responseHandler = new BasicResponseHandler();   
 String responseBody = httpclient.execute(httpGet, responseHandler);    
 httpclient.getConnectionManager().shutdown();    
 return Float.parseFloat(responseBody);   
 }    
public void convertToRs()
{String to = null;
 String amnt=JOptionPane.showInputDialog(null, "Any to rupee..","$");
 //if ("$".charAt(0).(();
 if(amnt.substring(0,1).compareTo("$")==0)
        to="USD";
 
 if(amnt.substring(0,1).compareTo("E")==0)
        to="EUR";
 double ghh=1;
 try{
       ghh=Double.parseDouble(amnt.substring(1));
 }catch (Exception e){}  
 YahooCurrencyConverter df= new YahooCurrencyConverter();
 try {
  float x=df.convert(to,"INR");
  new popMe( "Exchange rate is"+x,"From  "+to+" to INR", "exp", 6, 125);
  
  JOptionPane.showMessageDialog(null,x*ghh);
 } catch (IOException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 }
}