<html><head></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">import
java.text.DecimalFormat;
import java.util.Scanner;
public class BookBillSystem {
public static void main(String[] args) {
//create the Scanner instance for taking input from console
Scanner scanner = new Scanner(System.in);
//take input customer name
System.out.print("Customer Name: ");
String customerName = scanner.nextLine();
//take input noOfBooks purchased
System.out.print("No of books purchased: ");
int noOfBooks = scanner.nextInt();
//take input membership type
System.out.print("Membership type (1 for Regular, 2 for Premium): ");
int memberShipType = scanner.nextInt();
//now do the processing
//declarng constants
final double REGULAR_BOOK_PRICE = 12.95;
final double PREMIUM_BOOK_PRICE = 11.49;
int effectiveNo;
int freeBooks;
double grossPrice;
double totalPrice;
double salesTax;
memberShipType = JOptionPane.showConfirmDialog(null, "upgrade to 4.95?");
if (nResponse == JOptionPane.YES_OPTION) {
System.out.println("User wants to upgrade");}
else if (nResponse == JOptionPane.NO_OPTION) {
System.out.println("User does not want to upgrade.”"); } else {
System.out.println("User cancelled.”"); } //end if to check user input
if (memberShipType==1){ //regular customer
if (noOfBooks<8)
freeBooks = 0;
else if(noOfBooks>=8 && noOfBooks<=12)
else
freeBooks = 1;
freeBooks = 2;
effectiveNo = noOfBooks - freeBooks;
grossPrice = effectiveNo * REGULAR_BOOK_PRICE;
//calculating salestax @6.5%
salesTax = grossPrice * .65;
//calculating netPrice after adding tax
totalPrice = grossPrice + salesTax;
}
else { //premium customer
if (noOfBooks<6)
freeBooks = 0;
else if(noOfBooks>=6 && noOfBooks<=9)
freeBooks = 1;
else
effectiveNo = noOfBooks - freeBooks;
freeBooks = 2;
 //calculating totalPrice for premium member
grossPrice = effectiveNo * PREMIUM_BOOK_PRICE;
//calculating salestax @6.5%
salesTax = grossPrice * .65;
//calculating netPrice after adding tax
totalPrice = grossPrice + salesTax;
}
//print receipt
System.out.println("-----------------gBooks Receipt------------------");
System.out.println("--------A subsidiary of Grapefruit Company-------");
System.out.println("-------------------------------------------------");
System.out.println("Customer Name: " + customerName);
if (memberShipType==1)
System.out.println("Membership type: \"Regular\"");
else
System.out.println("Membership type: \"Premium\"");
System.out.println("Total no of books received: " + noOfBooks);
System.out.println("Price of books before sales tax: $"+ new
DecimalFormat("0.00").format(grossPrice));
System.out.println("Sales tax @6.5%: $"+ new
DecimalFormat("0.00").format(salesTax));
System.out.println("Total amount due: $"+ new
DecimalFormat("0.00").format(totalPrice));
System.out.println("-------------------------------------------------");
}
}
</pre></body></html>
i need help with line 28 - 33 how would i write the dialouge box in this for :
Use a Confirmation Dialog box to allow the user to upgrade their membership from Regular to Premium if he/she is currently a Regular member:
Title: Upgrade Membership
Message: Would you like to become a member for $4.95?
The Confirmation Dialog box should appear after you ask the user to enter their membership type. Based on what the user selects, the following message should be printed to the screen:
Yes: “Thank you. Your membership fee will be added to your receipt.”
No: “Thank you for your consideration.”
Cancel: “You may purchase a membership in the future.”
In addition, if the user chooses to upgrade their membership, they should be treated as a Premium customer and should also be charged a $4.95 membership fee.
