Java Currency Denomination Issue
<p>I'm trying to teach myself Java and running into a little hiccup just two chapters into the book I got :P This is one from one of the exercises: </p>

<p>"Write a class that calculates and displays the conversion of an entered number of dollars into currency denominations---20s, 10s, 5s, and 1s."</p>

<p>I'm going on four hours of reading from 0 knowledge of coding thus far so hopefully this doesn't sound too simple a question to answer. I'm sure there's a much more efficient way of writing this entire thing, but my question pertains to how I can terminate the entire thing if the user answers "yes" or continue on with the revised version if they answer "no"? </p>

<p>Also any advice or guidance you guys can give me on learning Java would be much appreciated!
Thanks for taking the time to read this</p>

<pre><code>import javax.swing.JOptionPane;
public class Dollars
{
    public static void main(String[] args)
    {
        String totalDollarsString;
        int totalDollars;
        totalDollarsString = JOptionPane.showInputDialog(null, "Enter amount to be     converted", "Denomination Conversion", JOptionPane.INFORMATION_MESSAGE);
    totalDollars = Integer.parseInt(totalDollarsString);
    int twenties = totalDollars / 20;
    int remainderTwenty = (totalDollars % 20);
    int tens = remainderTwenty / 10;
    int remainderTen = (totalDollars % 10);
    int fives = remainderTen / 5;
    int remainderFive = (totalDollars % 5);
    int ones = remainderFive / 1;
    JOptionPane.showMessageDialog(null, "Total Entered is $" + totalDollarsString + "\n" + "\nTwenty Dollar Bills: " + twenties + "\nTen Dollar Bills: " + tens + "\nFive Dollar Bills: " + fives + "\nOne Dollar Bills: " + ones);
    int selection;
    boolean isYes, isNo;
    selection = JOptionPane.showConfirmDialog(null,
        "Is this how you wanted the total broken down?", "Select an Option", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE);
    isYes = (selection == JOptionPane.YES_OPTION);
        JOptionPane.showMessageDialog(null, "You responded " + isYes + "\nThanks for your response!");
        isNo = (selection == JOptionPane.NO_OPTION);
        int twenties2 = totalDollars / 20;
        int tens2 = totalDollars / 10;
        int fives2 = totalDollars / 5;
        int ones2 = totalDollars / 1;
        JOptionPane.showMessageDialog(null, "Total Entered is $" + totalDollarsString + "\n" + "\nTwenty Dollar Bills: " + twenties2 + "\nTen Dollar Bills: " + tens2 + "\nFive Dollar Bills: " + fives2 + "\nOne Dollar Bills: " + ones2);
}
}
</code></pre>
