Answer Happy

Hi since I can't ask questions from previous answers I need to
know why my code won't compile and run here it is:
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.List;
import java.io.File;
import java.io.FileNotFoundException;
import java.text.DecimalFormat;
import java.util.Scanner;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class ShoppingCart extends JFrame
{
private static JPanel listPanel;
private static JPanel shoppingcartPanel;
private static JPanel buttonsPanel;
private static JList<String> listItems;
private static JButton addButton;
private static JButton removeButton;
private static JButton clearButton;
private static JButton checkOutButton;
private static String[] listArray;
private static List cartItems = new List();
final double salesTax = 0.06;
public ShoppingCart() throws FileNotFoundException
{
setTitle("Shopping Cart System");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new GridLayout(1, 3));
setLocationRelativeTo(null);
buildListPanel();
buildButtonPanel();
buildCartPanel();
add(listPanel);
add(buttonsPanel);
add(shoppingcartPanel);
pack();
setVisible(true);
}
private void buildButtonPanel()
{
buttonsPanel = new JPanel();
buttonsPanel.setLayout(new GridLayout(4, 1));
addButton = new JButton("Add To Cart");
addButton.addActionListener(new AddButtonListener());
removeButton = new JButton("Remove From Cart");
removeButton.addActionListener(new RemoveButtonListener());
clearButton = new JButton("Clear Cart");
clearButton.addActionListener(new clearButtonListener());
checkOutButton = new JButton("Check Out");
checkOutButton.addActionListener(new
CheckoutButtonListener());
buttonsPanel.add(addButton);
buttonsPanel.add(removeButton);
buttonsPanel.add(clearButton);
buttonsPanel.add(checkOutButton);
}
public class AddButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent arg0)
{
String value = (String) listItems.getSelectedValue();
cartItems.add(value);
}
}
public class RemoveButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String str = cartItems.getSelectedItem();
cartItems.remove(str);
}
}
public class clearButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
cartItems.removeAll();
}
}
private void buildCartPanel()
{
shoppingcartPanel = new JPanel();
shoppingcartPanel.setLayout(new BorderLayout());
shoppingcartPanel.setBorder(BorderFactory.createEtchedBorder());

JLabel cartLbl = new JLabel("Cart");
cartLbl.setFont(new Font("Times New Roman", Font.BOLD, 18));
shoppingcartPanel.add(cartLbl, BorderLayout.NORTH);
shoppingcartPanel.add(cartItems, BorderLayout.CENTER);
}
public class CheckoutButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
String line;
double totalCost = 0;
double costofItem = 0;
File file = new File("BookPrices.txt");
Scanner fileReader = null;
try
{
fileReader = new Scanner(file);
}
catch (FileNotFoundException e1)
{
e1.printStackTrace();
}
while (fileReader.hasNext())
{
line = fileReader.nextLine();
String[] cost = line.split(",");
String title = cost[0];
costofItem = Double.parseDouble(cost[1]);
for (int i = 0; i < cartItems.getItemCount(); i++)
{
if (title.equals(cartItems.getItem(i)))
totalCost += costofItem;
}
}
double tax = salesTax * totalCost;
DecimalFormat myFormatter = new DecimalFormat("###.##");
JOptionPane.showMessageDialog(null, "Total Cost is:" +
myFormatter.format(tax + totalCost));
}
}
private void buildListPanel() throws FileNotFoundException
{
listPanel = new JPanel();
listPanel.setLayout(new BorderLayout());
listPanel.setBorder(BorderFactory.createEtchedBorder());
JLabel label = new JLabel("Select A Book Title");
label.setFont(new Font("Times New Roman", Font.BOLD, 18));
String line;
String[] tempArray=new String[100];
int index = 0;
File file = new File("BookPrices.txt");
Scanner fileReader = new Scanner(file);
while (fileReader.hasNext())
{
line = fileReader.nextLine();
String[] titles = line.split(",");
tempArray[index] = titles[0];
index++;
}
listArray=new String[index];
for(int i=0;i<index;i++)
{
listArray=tempArray;
}
listItems = new JList<String>(listArray);
listPanel.add(label, BorderLayout.NORTH);
listPanel.add(listItems, BorderLayout.CENTER);
}
public static void main(String[] args) throws
FileNotFoundException
{
new ShoppingCart();
}
}
if you get it to run please tell me which IDE you use and also
the steps you took. Thank you