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POHow do I switch the end function?
 

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  1. POHow do I switch the end function?
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    <p>As in, the value as the end where it says "X dollars converts to Y russian ruble" (after the two Digits new Decimal Format) - the problem is that it can be russian ruble, british pound, or euro. How can I differentiate? (text inserted at line in question)</p> <pre><code>import java.awt.*; import java.applet.*; import java.awt.event.*; import java.text.DecimalFormat; public class CurrencyConversion extends Applet implements ItemListener { //declare variables and color double dollars, answer; int empCode; Image dollarSign; Color darkRed = new Color(160, 50, 0); //Create components for applet Label promptLabel = new Label("Enter the dollar amount (do not use commas or dollar signs):"); TextField currencyField = new TextField(20); Label codeLabel = new Label ("Select the desired currency:"); CheckboxGroup codeGroup = new CheckboxGroup () ; Checkbox britishpoundBox = new Checkbox("British Pound",false,codeGroup); Checkbox euroBox = new Checkbox("Euro",false,codeGroup); Checkbox russianrubleBox = new Checkbox("Russian Ruble",false,codeGroup); Checkbox hiddenBox = new Checkbox("",true,codeGroup); Label outputLabel = new Label("Click an option to convert the desired currency."); public void init() { setBackground(darkRed); setForeground(Color.white); add(promptLabel); add(currencyField); currencyField.requestFocus(); currencyField.setForeground(Color.black); add(codeLabel); add(britishpoundBox); britishpoundBox.addItemListener(this); add(euroBox); euroBox.addItemListener(this); add(russianrubleBox); russianrubleBox.addItemListener(this); add(outputLabel); } //This method is triggered by click public void itemStateChanged(ItemEvent choice) { try { dollars = getCurrency(); empCode = getCode(); answer = getComm(dollars,empCode); output(answer, dollars); } catch (NumberFormatException e) { outputLabel.setText("You must enter a dollar amount greater than zero."); hiddenBox.setState(true); currencyField.setText(""); currencyField.requestFocus(); } } public double getCurrency() { double currency = Double.parseDouble(currencyField.getText()); if (currency &lt;= 0) throw new NumberFormatException(); return currency; } public int getCode() { int code = 0; if (britishpoundBox.getState()) code = 1; else if (euroBox.getState()) code = 2; else if (russianrubleBox.getState()) code = 3; return code; } public double getComm(double currency, int code) { double amount = 0.0; switch(code) { case 1: amount = .79610 * currency; break; case 2: amount = .70880 * currency; break; case 3: amount = 35.88240 * currency; break; } return amount; } public void output(double amount, double currency) { DecimalFormat twoDigits = new DecimalFormat("##.00"); outputLabel.setText("Your amount of " + twoDigits.format(currency) + " dollars converts to " + twoDigits.format(amount) RIGHT HERE - what do I do? ); } public void paint(Graphics g) { dollarSign = getImage(getDocumentBase(), "dollarsign.gif"); g.drawImage(dollarSign,12,28,this); } } </code></pre>
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    1. COIf you hardcode the exchange rates in the program, you need to update it very frequently. At the very least put them in a properties files that can be updated externally.
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      1. POHow do I switch the end function?
      1. USThilo
 

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