centsRemaining = totalCents - priceOfCandy;

/**
* @(#)VendingMachineProject.java
*
*
* @Michael Anderson
* @version 1.00 2013/2/13
*/


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class VendingMachineProject extends JFrame
   implements ActionListener {

   private JButton button;

   public static void main(String[] args) {
       VendingMachineProject frame = new VendingMachineProject();
       frame.setSize(400, 300);
       frame.createGUI();
       frame.setVisible(true);
   }

   private void createGUI() {
       setDefaultCloseOperation(EXIT_ON_CLOSE);
       Container window = getContentPane();
       window.setLayout(new FlowLayout() );

       button = new JButton("Insert currency here.");
       window.add(button);
       button.addActionListener(this);
   }

public void actionPerformed(ActionEvent event) {
       int totalCents, priceOfCandy;
       //Total amount put in, price of candy overall.
       int dollars, quarters, dimes, nickles, pennies;
       //Amounts in dollars (100), quarters (25), dimes (10), nickles (5), pennies (1).
       int centsRemaining;
       String totalCentsString ,candyString;

       totalCentsString = JOptionPane.showInputDialog(
           "Enter your amount in change. I.E. $1.35 is 135.");
       totalCents = Integer.parseInt(totalCentsString);
       
       candyString = JOptionPane.showInputDialog(
           "Enter the price of candy. I.E. Candy is = 0.50 cents or 50.");
        priceOfCandy = Integer.parseInt(candyString);
       
       centsRemaining = totalCents - priceOfCandy;
       System.out.println( " priceOfCandy \n " + priceOfCandy);
             
       dollars = centsRemaining / 100;
        centsRemaining = totalCents % 100;
       //Used to find amount in dollars.
   
       quarters = centsRemaining / 25;
        centsRemaining = totalCents % 25;
       //Used to find amount in quarters.
       
       dimes = centsRemaining / 10;
        centsRemaining = totalCents % 10;
        //Used to find amount in dimes.
       
        nickles = centsRemaining / 5;
        centsRemaining = totalCents % 5;
        //Used to find amount in nickles.
       
       
        pennies = centsRemaining / 1;
        centsRemaining = totalCents % 1;
        //Used to find amount in pennies.
     
       
       JOptionPane.showMessageDialog(null,
           totalCentsString + " cents breaks down into:\n" +
           dollars + " dollars\n" +
           quarters + " quarters\n" +
           dimes + " dimes\n" +
           nickles + " nickles\n" +
           pennies + " pennies\n" +
           centsRemaining + " cents.");
           
           
   }
}

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/**
* @(#)VendingMachineProject.java
*
*
* @Michael Anderson
* @version 1.00 2013/2/13
*/


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class VendingMachineProject extends JFrame
   implements ActionListener {

   private JButton button;

   public static void main(String[] args) {
       VendingMachineProject frame = new VendingMachineProject();
       frame.setSize(400, 300);
       frame.createGUI();
       frame.setVisible(true);
   }

   private void createGUI() {
       setDefaultCloseOperation(EXIT_ON_CLOSE);
       Container window = getContentPane();
       window.setLayout(new FlowLayout() );

       button = new JButton("Insert currency here.");
       //Currency button.
       window.add(button);
       button.addActionListener(this);
   }

public void actionPerformed(ActionEvent event) {
       int totalCents, priceOfCandy;
       //Total amount put in, price of candy overall.
       int dollars, quarters, dimes, nickles, pennies;
       //Amounts in dollars (100), quarters (25), dimes (10), nickles (5), pennies (1).
       int centsRemaining;
       String totalCentsString ,candyString;

       totalCentsString = JOptionPane.showInputDialog(
           "Enter your amount in change. I.E. $1.35 is 135.");
           //Price in whole numbers. Example = 1 dollar = 100 pennies.
       totalCents = Integer.parseInt(totalCentsString);
       
       candyString = JOptionPane.showInputDialog(
           "Enter the price of candy. I.E. Candy is = 0.50 cents or 50.");
           //Price of candy in whole numbers. 50 cents = 50 pennies.
        priceOfCandy = Integer.parseInt(candyString);
       
       centsRemaining = totalCents - priceOfCandy;
       System.out.println( " priceOfCandy \n " + priceOfCandy);
             
       dollars = centsRemaining / 100;
        centsRemaining = centsRemaining % 100;
       //Used to find amount in dollars.
   
       quarters = centsRemaining / 25;
        centsRemaining = centsRemaining % 25;
       //Used to find amount in quarters.
       
       dimes = centsRemaining / 10;
        centsRemaining = centsRemaining % 10;
        //Used to find amount in dimes.
       
        nickles = centsRemaining / 5;
        centsRemaining = centsRemaining % 5;
        //Used to find amount in nickles.

        pennies = centsRemaining / 1;
        centsRemaining = centsRemaining % 1;
        //Used to find amount in pennies.
     
       
       JOptionPane.showMessageDialog(null,
           totalCentsString + " cents breaks down into:\n" +
           dollars + " dollars\n" +
           quarters + " quarters\n" +
           dimes + " dimes\n" +
           nickles + " nickles\n" +
           pennies + " pennies\n");
          //Total remaining change in appropriate amounts.      
   }
}

centsRemaining = totalCents % 100;

centsRemaining = centsRemaining % 100;