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Thread: ConvertCurrency

  1. #1
    Albert050 is offline Member
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    Nov 2010
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    Default ConvertCurrency

    Can anybody help me with Convert Currency by using GUI, I have the code that I work on but I have trouble working with GUI to show the result. The cod basically read from file and take number an convert it to other currency. Can you give idea how to do it?

    This is what I reached so far :


    package cinverter;

    import java.util.*;
    public class ConvertMoney extends javax.swing.JFrame {

    /** Creates new form ConvertMoney */
    public ConvertMoney() {

    private void ConvertmoneyActionPerformed(java.awt.event.ActionE vent evt) {

    class CurrencyConverter{
    String Amount= CurrentAmount.getText();
    double i = Integer.parseInt(Amount);

    private HashMap<String, Double> Rates;
    private ArrayList<String> Currencies;

    public CurrencyConverter() {
    Rates = new HashMap<String, Double>(); //instantiate HashMap with key-value types defined
    Currencies = new ArrayList<String>(); // instantiate ArrayList with element type defined
    populateRates(); //populate HashMap with key-value pairs
    loadCurrencies(); // populate ArrayList with elements

    private void populateRates() {
    Scanner SC=null;
    SC = new Scanner(new FileReader(new File("Rates.txt")));
    }catch(IOException e){
    System.err.println("File Error");
    while (SC.hasNextLine()){
    String[] S = SC.nextLine().split(" ",2); //parse input
    Rates.put(S[0], Double.parseDouble(S[1]));

    private void loadCurrencies(){
    HashSet<String> HSI = new HashSet<String>(Rates.keySet());//instantiate HashSet and load with Key element

    Iterator<String> it1 = HSI.iterator();
    String s =;
    Currencies.add(s); // populste ArrayList with HSI elements

    public double convert(String FC, String TC, double amt){
    double result = amt/Rates.get(FC)*Rates.get(TC);
    return result;

    public void showAll(){
    System.out.println("Rates Data: " + Rates);
    System.out.println("Currencies: " + Currencies);


    private void CurrentAmountActionPerformed(java.awt.event.Action Event evt) {
    // TODO add your handling code here:

    private void Exit1ActionPerformed(java.awt.event.ActionEvent evt) {
    // TODO add your handling code here:


    * @param args the command line arguments

    public static void main(String args[]) {
    /* Set the Nimbus look and feel */

    CurrencyConverter CC = new CurrencyConverter();
    double amt = 50.55;
    System.out.println(amt + " USD = " + CC.convert("USD", "INR", amt) + " INR");


  2. #2
    Fubarable's Avatar
    Fubarable is offline Moderator
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    Jun 2008
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  3. #3
    Albert050 is offline Member
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    Nov 2010
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    Default Re: ConvertCurrency

    Okay but no body want to help me, I saw many of them visit this topic but no one I think interested.

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