I have a project that I am doing, but I cannot get my final answer to go into the text field that I want, it keeps coming out in a new terminal window. What did I do wrong??

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import javax.swing.*;
import java.awt.*;
// A cash register totals up sales and computes change due.
public class CashRegister
{
public static final double DOLLAR_VALUE = 1.00;
public static final double QUARTER_VALUE = 0.25;
public static final double DIME_VALUE = 0.1;
public static final double NICKEL_VALUE = 0.05;
public static final double PENNY_VALUE = 0.01;

public double Dollars;
public double Quarters;
public double Dimes;
public double Nickels;
public double Pennies;

private double purchase;
private double payment;
private static final int FRAME_WIDTH = 500;
private static final int FRAME_HEIGHT = 400;


public static void main(String[] args)
{
JFrame frame = new JFrame();
JPanel panel = new JPanel();

final int FIELD_WIDTH = 5;

final JLabel label = new JLabel(" Enter total payment amount, EX: 11.76");
final JTextField totalCostField = new JTextField(FIELD_WIDTH);

final JLabel labelDollars = new JLabel(" Enter dollars used if none enter 0, EX: 11");
final JTextField totalPayDollars = new JTextField(FIELD_WIDTH);

final JLabel labelQuarters = new JLabel(" Enter quarters used if none enter 0, EX: 2");
final JTextField totalPayQuarters = new JTextField(FIELD_WIDTH);

final JLabel labelDimes = new JLabel(" Enter dimes used if none enter 0, EX: 2");
final JTextField totalPayDimes = new JTextField(FIELD_WIDTH);

final JLabel labelNickels = new JLabel(" Enter nickels used if none enter 0, EX: 1");
final JTextField totalPayNickels = new JTextField(FIELD_WIDTH);

final JLabel labelPennies = new JLabel(" Enter pennies used if none enter 0, EX: 1");
final JTextField totalPayPennies = new JTextField(FIELD_WIDTH);

final JLabel labelChange = new JLabel(" This is your change ------>");
final JTextField totalChange = new JTextField(FIELD_WIDTH);


JButton buttonSmaller = new JButton("Click for change.");
JButton buttonLarger = new JButton("Non-Functional at this time. ");

frame.add(panel);
panel.setLayout(new GridLayout(8,1));

panel.add(label);
panel.add(totalCostField);

panel.add(labelDollars);
panel.add(totalPayDollars);

panel.add(labelQuarters);
panel.add(totalPayQuarters);

panel.add(labelDimes);
panel.add(totalPayDimes);

panel.add(labelNickels);
panel.add(totalPayNickels);

panel.add(labelPennies);
panel.add(totalPayPennies);


panel.add(buttonSmaller);
panel.add(buttonLarger);

panel.add(labelChange);
panel.add(totalChange);

class totalCostListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Cost = Double.parseDouble(totalCostField.getText());
}
}

class totalPayDollars implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Dollars = Double.parseDouble(totalPayDollars.getText());
}
}

class totalPayQuarters implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Quarters = Double.parseDouble(totalPayQuarters.getText());
}
}

class totalPayDimes implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Dimes = Double.parseDouble(totalPayDimes.getText());
}
}

class totalPayNickels implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Nickels = Double.parseDouble(totalPayNickels.getText());
}
}

class totalPayPennies implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double Pennies = Double.parseDouble(totalPayPennies.getText());
}
}

class SmallerButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
double payment = (Double.parseDouble(totalPayDollars.getText()))
+(Double.parseDouble(totalPayQuarters.getText())* QUARTER_VALUE)
+ (Double.parseDouble( totalPayDimes.getText())* DIME_VALUE)
+ (Double.parseDouble( totalPayNickels.getText())* NICKEL_VALUE)
+ (Double.parseDouble(totalPayPennies.getText())* PENNY_VALUE);
double Cost = Double.parseDouble(totalCostField.getText());
double totalChange = Cost - payment;
System.out.println("The Change is: " + totalChange);

label.repaint();
}
}

class LargerButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
label.repaint();
}
}

ActionListener listenertotalCost = new totalCostListener();
totalCostField.addActionListener(listenertotalCost);

ActionListener listenertotalPayDollars = new totalPayDollars();
totalPayDollars.addActionListener(listenertotalPayDollars);

ActionListener listenertotalPayQuarters = new totalPayQuarters();
totalPayQuarters.addActionListener(listenertotalPayQuarters);

ActionListener listenertotalPayDimes = new totalPayDimes();
totalPayDimes.addActionListener(listenertotalPayDimes);

ActionListener listenertotalPayNickels = new totalPayNickels();
totalPayNickels.addActionListener(listenertotalPayNickels);

ActionListener listenertotalPayPennies = new totalPayPennies();
totalPayPennies.addActionListener(listenertotalPayPennies);

ActionListener listenerSmaller = new SmallerButtonListener();
buttonSmaller.addActionListener(listenerSmaller);

ActionListener listenerLarger = new LargerButtonListener();
buttonLarger.addActionListener(listenerLarger);

// Show the frame
frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("ColorChangerViewer");
frame.setLocation(100,100);
frame.setVisible(true);
}
}

For future please use hash "#" sign in the toolbar to insert code


That is your problem, previously declared variable re-declared in defferent part of code

with quick variable update

Thanks Peter. I appreciate it.