I need my Java program to reset and start a new order when the New Order button is pressed. I know I have to reset the variables but am I missing anything else in my code?

This is my Summation Class

public class Summation {

public static double subTotal(String arrayFromFile, int howMany) {

double subTotal;

double price = Double.parseDouble(arrayFromFile);

subTotal = price * howMany;

//System.out.println(price);

//System.out.println(howMany);

//cost = howMany * arrayFromFile;

return subTotal;

}

}

This is the ReadFile class

import java.io.*;

import java.util.*;

public class ReadFile {

public static int myMethod()

{

int numberOfLines = 0;

try

{

// Open the file that is the first

// command line parameter

FileInputStream fstream = new FileInputStream("inventory.txt");

// Get the object of DataInputStream

DataInputStream in = new DataInputStream(fstream);

BufferedReader br = new BufferedReader(new InputStreamReader(in));

String strLine;

//Read File Line By Line

while ((strLine = br.readLine()) != null)

{

// Print the content on the console

//System.out.println (strLine);

++numberOfLines;

}

//Close the input stream

in.close();

br.close();

}

catch (Exception e)

{

//Catch exception if any

System.err.println("Error: " + e.getMessage());

}

//System.out.println(numberOfLines);

return numberOfLines;

}

public static String[][] convertTo2DArray() {

String [][] array2D = null;

try

{

FileInputStream fstream = new FileInputStream("inventory.txt");

DataInputStream in = new DataInputStream(fstream);

BufferedReader br = new BufferedReader(new InputStreamReader(in));

String thisLine;

List lines = new ArrayList();

//Read File Line By Line

while ((thisLine = br.readLine()) != null)

{

lines.add(thisLine.split(","));

}

array2D = new String[lines.size()][0];

lines.toArray(array2D);

//Close the input stream

in.close();

br.close();

}

catch (Exception e)

{

//Catch exception if any

System.err.println("Error: " + e.getMessage());

}

//System.out.println(numberOfLines);

return array2D;

}

}

The following code is the class with most of my code called Project1GUI

/*Name: Kenneth Gonzalez

* Course: CNT 4714 - Spring 2018

* Assignment Title: Program 1 - Event Driven Programming

* Date: Sunday January 28, 2018

*/

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JButton;

import java.awt.event.ActionListener;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.util.ArrayList;

import java.awt.event.ActionEvent;

import java.awt.Font;

import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

import java.lang.String;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.awt.Color;

public class Project1GUI {

private JFrame frame;

private JTextField txtFieldNumOfItems;

private JTextField BookID;

private JTextField Quantity;

private JTextField BookInformation;

private JTextField Subtotal;

private JButton btnProcessItem;

private JButton btnConfirmItem;

private JButton btnViewOrder;

private JButton btnFinishOrder;

private int numOfItems;

int quantityOfBook;

private int count = 1;

private int subTotalCount = 0;

private double subTotalforItems = 0;

private static String array2DFromFile[][];

private static String arrayFromFile[];

String [][]array2 = null;

static int numRows;

static int numCols;

int count1 = 0;

int bookIDProc = 0;

double subTotal = 0;

String everything = null;

String ViewOrderOutput="";

String FinishOrderOutput="";

String text;

String numberList;

String s = null;

String result;

String discount = null;

ArrayList numbers = new ArrayList();

ArrayList cart = new ArrayList();

static ArrayList list = new ArrayList();

ArrayList itemsForTransactionFile = new ArrayList();

/**

* Launch the application.

*/

public static void main(String[] args)

{

EventQueue.invokeLater(new Runnable()

{

public void run()

{

try

{

Project1GUI window = new Project1GUI();

window.frame.setVisible(true);

//Calling the start function that begins by reading in the file.

start();

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

public static void start()

{

//Parses the file and returns the elements in a 2D array.

array2DFromFile = ReadFile.convertTo2DArray();

numCols = array2DFromFile[0].length;

numRows = array2DFromFile.length;

//Add the elements of the 2D array to a 1D array so we can check if a BOOKID exist or doesn't exist.

for(int x = 0; x < numRows; x++)

{

for(int y = 0; y < numCols; y++)

{

list.add(array2DFromFile[x][y]);

}

}

arrayFromFile = new String[list.size()];

for(int i = 0; i < arrayFromFile.length; i++)

{

arrayFromFile[i] = list.get(i);

}

}

/**

* Create the application.

*/

public Project1GUI() {

initialize();

}

/**

* Initialize the contents of the frame.

*/

@SuppressWarnings("deprecation")

private void initialize() {

frame = new JFrame();

frame.getContentPane().setBackground(Color.GREEN);

frame.setBounds(100, 100, 920, 432);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.getContentPane().setLayout(null);

txtFieldNumOfItems = new JTextField();

txtFieldNumOfItems.setBounds(370, 50, 376, 22);

frame.getContentPane().add(txtFieldNumOfItems);

txtFieldNumOfItems.setColumns(10);

BookID = new JTextField();

BookID.setBounds(370, 97, 376, 22);

frame.getContentPane().add(BookID);

BookID.setColumns(10);

Quantity = new JTextField();

Quantity.setBounds(370, 147, 376, 22);

frame.getContentPane().add(Quantity);

Quantity.setColumns(10);

BookInformation = new JTextField();

BookInformation.setBounds(370, 197, 376, 22);

frame.getContentPane().add(BookInformation);

BookInformation.setColumns(10);

BookInformation.setEditable(false);

Subtotal = new JTextField();

Subtotal.setBounds(370, 251, 376, 22);

frame.getContentPane().add(Subtotal);

Subtotal.setColumns(10);

Subtotal.setEditable(false);

JLabel lblItemsInOrder = new JLabel("Enter the number of items in this order: ");

lblItemsInOrder.setFont(new Font("Times New Roman", Font.PLAIN, 16));

lblItemsInOrder.setBounds(43, 53, 274, 19);

frame.getContentPane().add(lblItemsInOrder);

JLabel lblBookID = new JLabel("Enter BookID for item #" + count +":");

lblBookID.setFont(new Font("Times New Roman", Font.PLAIN, 16));

lblBookID.setBounds(43, 100, 274, 16);

frame.getContentPane().add(lblBookID);

JLabel lblQuantity = new JLabel("Enter quantity for item #" + count +":");

lblQuantity.setFont(new Font("Times New Roman", Font.PLAIN, 16));

lblQuantity.setBounds(43, 150, 274, 16);

frame.getContentPane().add(lblQuantity);

JLabel lblItemInfo = new JLabel("Item #" + count + " info:");

lblItemInfo.setFont(new Font("Times New Roman", Font.PLAIN, 16));

lblItemInfo.setBounds(43, 200, 274, 16);

frame.getContentPane().add(lblItemInfo);

JLabel lblSubtotal = new JLabel("Order Subtotal for " +subTotalCount+ " item(s):");

lblSubtotal.setFont(new Font("Times New Roman", Font.PLAIN, 16));

lblSubtotal.setBounds(43, 254, 274, 16);

frame.getContentPane().add(lblSubtotal);

btnProcessItem = new JButton("Process Item # " + count);

btnProcessItem.setBounds(43, 337, 131, 25);

frame.getContentPane().add(btnProcessItem);

//If Process Item button is pressed take certain actions

btnProcessItem.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0)

{

//Disable how many items the customer wants after they press the Process Item button.

numOfItems = Integer.parseInt(txtFieldNumOfItems.getText());

txtFieldNumOfItems.setEditable(false);

//Check to see if the ID entered is 5 characters long

if(count1 < numOfItems)

{

if(BookID.getText().length() == 5)

{

s = BookID.getText();

bookIDProc = Integer.parseInt(BookID.getText());

}

else if(BookID.getText().length() > 5)

{

JOptionPane.showMessageDialog(frame, "Please enter a five digit number!");

System.exit(0);

}

else if(BookID.getText().length() < 5)

{

JOptionPane.showMessageDialog(frame, "Please enter a five digit number!");

System.exit(0);

}

//Converts text user entered to int and assigns to quantityOfBook

quantityOfBook = Integer.parseInt(Quantity.getText());

//Checks if the bookID entered by the user matches the bookID from array that was read from a file

for(int x = 0; x < numRows; x++)

{

for(int y = 0; y < 1; y++)

{

//Checks that the string s entered by the user matches an item in the 2D array

if(array2DFromFile[x][0].equals(s))

{

if(quantityOfBook <= 4)

{

discount = ("0");

BookInformation.setText(array2DFromFile[x][0] + array2DFromFile[x][1] + array2DFromFile[x][2] +" " +quantityOfBook+" " + discount +"% "+ array2DFromFile[x][2]);

}

else if(quantityOfBook >= 5 && quantityOfBook <= 9)

{

discount = ("10");

BookInformation.setText(array2DFromFile[x][0] + array2DFromFile[x][1] + array2DFromFile[x][2] +" " +quantityOfBook+" " +discount +"% " +array2DFromFile[x][2]);

}

else if(quantityOfBook >= 10 && quantityOfBook <= 14)

{

discount = ("15");

BookInformation.setText(array2DFromFile[x][0] + array2DFromFile[x][1] + array2DFromFile[x][2] +" " +quantityOfBook+" " +discount+"% " +array2DFromFile[x][2]);

}

else if(quantityOfBook >= 15)

{

discount = ("20");

BookInformation.setText(array2DFromFile[x][0] + array2DFromFile[x][1] + array2DFromFile[x][2] +" " +quantityOfBook+" "+ discount+"% " +array2DFromFile[x][2]);

}

if(arg0.getSource() == btnProcessItem)

{

btnProcessItem.setEnabled(false);

if(btnProcessItem.isEnabled()==false)

{

btnConfirmItem.setEnabled(true);

count1++;

if(count1 == numOfItems)

{

BookID.setEditable(false);

Quantity.setEditable(false);

lblQuantity.setVisible(false);

lblBookID.setVisible(false);

btnProcessItem.setText("Process Item");

btnProcessItem.setEnabled(false);

}

}

}

}

}

}

if (!list.contains(s))

{

JOptionPane.showMessageDialog(frame, "BookID "+ s + " does not exist.");

BookID.setText("");

Quantity.setText("");

if(arg0.getSource() == btnProcessItem)

{

btnProcessItem.setEnabled(true);

}

}

}

}

});

btnConfirmItem = new JButton("Confirm item #" + count);

btnConfirmItem.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent arg0)

{

btnViewOrder.setEnabled(true);

btnFinishOrder.setEnabled(true);

btnConfirmItem.setEnabled(false);

btnProcessItem.setEnabled(true);

s = BookID.getText();

for(int x = 0; x < numRows; x++)

{

for(int y = 0; y < 1; y++)

{

if(array2DFromFile[x][0].equals(s))

{

JOptionPane.showMessageDialog(frame, "Item # " +count+ " accepted");

BookID.setText("");

Quantity.setText("");

subTotal = Summation.subTotal(array2DFromFile[x][2], quantityOfBook);

subTotalforItems += subTotal;

String number = Double.toString(subTotalforItems);

subTotalCount++;

lblSubtotal.setText("Order Subtotal for " +subTotalCount+ " item(s):");

Subtotal.setText("$" +number);

StringBuilder builder = new StringBuilder();

BookInformation.setText(array2DFromFile[x][0] + array2DFromFile[x][1] + array2DFromFile[x][2] + " " +quantityOfBook + " "+ discount + " "+subTotal);

builder.append(array2DFromFile[x][0]).append(", ").append(array2DFromFile[x][1]).append(", ").append("$").append(array2DFromFile[x][2]).append(", ").append(quantityOfBook).append(", ").append(discount).append(", ").append("$").append(subTotal);

result = builder.toString();

itemsForTransactionFile.add(result);

}

}

}

text = BookInformation.getText();

cart.add(text);

numberList = Integer.toString(count);

numbers.add(numberList);

count = Integer.parseInt(numberList);

count++;

lblBookID.setText("Enter BookID for item #" + count +":");

lblQuantity.setText("Enter quantity for item #" + count + ":");

btnProcessItem.setText("Process Item # " + count);

btnConfirmItem.setText("Confirm item #" + count);

if(count1 == numOfItems)

{

btnProcessItem.setText("Process Item");

btnProcessItem.setEnabled(false);

btnConfirmItem.setText("Confirm Item");

}

}

});

btnConfirmItem.setBounds(186, 337, 131, 25);

frame.getContentPane().add(btnConfirmItem);

btnConfirmItem.setEnabled(false);

btnViewOrder = new JButton("View Order");

btnViewOrder.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent arg0)

{

for(int i =0; i

{

everything = cart.get(i).toString();

String everything2 = numbers.get(i).toString();

ViewOrderOutput += everything2 +". " + " " +everything+ " ";

}

JOptionPane.showMessageDialog(frame, ViewOrderOutput);

}

});

btnViewOrder.setBounds(329, 337, 131, 25);

frame.getContentPane().add(btnViewOrder);

btnViewOrder.setEnabled(false);

btnFinishOrder = new JButton("Finish Order");

btnFinishOrder.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

double TaxAmount = subTotalforItems * .06;

double orderTotal = TaxAmount + subTotalforItems;

Date today = new Date();

SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("yyMMddHHmmSS");

String date = DATE_FORMAT.format(today);

DateTimeFormatter dtf = DateTimeFormatter.ofPattern("MM/dd/yyyy HH:mm:ss");

LocalDateTime now = LocalDateTime.now();

JOptionPane.showMessageDialog(frame, dtf.format(now) + " Number of line items: " + count1 + " Item# / ID / Title / Price / Qty / Disc % / Subtotal: " +

" "+ ViewOrderOutput +" Order Subtotal: $" + subTotalforItems + " Tax Rate: 6% "+ "Tax Amount:\t $" + TaxAmount +

" Order total:\t $" +orderTotal +" Thanks for shopping at the Ye Olde Book Shoppe!");

ArrayList newlist = new ArrayList();

for(int x = 0; x < itemsForTransactionFile.size(); x++)

{

StringBuilder builder = new StringBuilder();

String result = null;

builder.append(date).append(", ").append(itemsForTransactionFile.get(x)).append(", ").append(now);

result = builder.toString();

newlist.add(result);

}

String []results = newlist.toArray(new String[newlist.size()]);

//Writes to transaction file

/*BufferedWriter outputWriter = null;

try {

outputWriter = new BufferedWriter(new FileWriter("transaction.txt"));

for(int x = 0; x < results.length; x++)

{

outputWriter.write(results[x]);

outputWriter.newLine();

}

outputWriter.flush();

outputWriter.close();

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}*/

try {

File file = new File("transaction.txt");

if(!file.exists()) {

file.createNewFile();

}

FileWriter fw = new FileWriter(file, true);

BufferedWriter bw = new BufferedWriter(fw);

for(int x = 0; x < results.length; x++)

{

bw.write(results[x]);

bw.newLine();

}

bw.close();

}

catch(IOException ioe) {

ioe.printStackTrace();

}

}

});

btnFinishOrder.setBounds(472, 337, 131, 25);

frame.getContentPane().add(btnFinishOrder);

btnFinishOrder.setEnabled(false);

JButton btnNewOrder = new JButton("New Order");

btnNewOrder.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent arg0) {

numOfItems = 0;

quantityOfBook = 0;

count = 1;

subTotalCount = 0;

subTotalforItems = 0;

array2DFromFile = null;

arrayFromFile = null;

array2 = null;

numRows = 0;

numCols = 0;

count1 = 0;

bookIDProc = 0;

subTotal = 0;

everything = null;

ViewOrderOutput="";

FinishOrderOutput="";

text = null;

numberList = null;

s = null;

result = null;

discount = null;

}

});

btnNewOrder.setBounds(615, 337, 131, 25);

frame.getContentPane().add(btnNewOrder);

/*This JButton will exit the system when the user clicks it*/

JButton btnExit = new JButton("Exit");

btnExit.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(e.getSource() == btnExit) System.exit(0);

}

});

btnExit.setBounds(758, 337, 131, 25);

frame.getContentPane().add(btnExit);

}

}

Here is the inventory.txt file which is read from

11111, "Top Secret Twenty One - Janet Evanovich", 8.99 22222, "W Is For Wasted - Sue Grafton", 9.95 33333, "Gray Mountain - John Grisham", 14.95 39872, "The Whistler - John Grisham", 12.50 44444, "Revival - Stephen King", 12.95 55555, "Everyday Italian - Giada de Laurentiis", 18.99 66666, "Refusal - Felix Francis", 7.99 77777, "Dust - Patricia Cornwell", 12.99 89124, "Into the Water - Paula Hawkins", 14.99 19342, "The Surgeon - Tess Gerritsen", 10.99 69843, "CyberStorm - Matthew Mather", 10.50 69999, "Cross the Line - James Patterson", 9.50 88888, "Terminal City - Linda Fairstein", 10.95 99999, "Rogue Lawyer - John Grisham", 15.95 11112, "The Guilty - David Baldacci", 14.95 11234, "Tricky Twenty-Two - Janet Evanovich", 12.95 23456, "14th Deadly Sin - James Patterson", 14.95 43786, "The Girl on the Train - Paula Hawkins", 9.99 23411, "Chaos - Patricia Cornwell", 10.75 12123, "X - Sue Grafton", 9.99 44556, "The Fix - David Baldacci", 12.99 33214, "Against All Odds - Danielle Steele", 18.99 98342, "The Circle - Dave Eggers", 14.99 67534, "The Black Book - James Patterson", 15.99 89891, "Turbo Twenty-three - Janet Evanovich", 8.99 45376, "The Apprentice - Tess Gerritsen", 9.99 12277, "Y Is For Yesterday - Sue Grafton", 10.99

The following code works. I have the latest java developer packages and such. I am using eclispe to code. All and any help would be appreciated.