Question

TULUI about stored within the JAR file, including the file that con AH excel the files that are stored within the JA the main() method for the application. it and debug the Invoice arts directory. Then, test rash with a runtime error and Exercise 6-1 Test and debug the in application This exercise guides you through the process of usi cans to test and debug an application. Test the Invoice application with invalid data 1. Open the ch06_ex1_Invoice project that's in the Invoice application with an invalid subtot, sign too). In too). This should cause the application to crash with a runtim to display an error message in the Output window. and note the line number of the statement in the Study the error message, and note the line number InvoiceApp class that caused the crash. 2 Click on the link to that line of code. This should open the Invoice Ann file in the code editor and highlight the line of code that caused the error From this information, determine the cause of the problem and fix it. Set a breakpoint and step through the application 4. Set a breakpoint on this line of code: double discount Percent = 0.0; Then, click on the Debug Project button in the toolbar. This runs the project with the debugger on. 5. Click the Output tab to display the Output window and enter a value of 100 for the subtotal when prompted by the application. When you do, the application runs to the breakpoint and stops. 6. Click the Variables tab to display the Variables window and note that the choice, customerType, and subtotal variables have been assigned values. 7. Click the Step Into button in the toolbar repeatedly to step through the application one statement at a time. After each step, review the values in the Variables window to see how they have changed. Note how the application steps through the switch statement based on the customerType value and the if/else statements based on the subtotal value. 8. Click the Continue button in the toolbar to continue the execution of the application 9. Display the Output window again. Then, enter “y” to continue and enter a value of 50 for the subtotal. 10. Display the Variables window again and inspect the values of the variables. 11. Click the Step Over button in the toolbar repeatedly to step through the application one statement at a time. After each step, review the values in the Variables window to see how they have changed. he

6-1 Test and debug the Invoice Application

i need help with this please.. all help is appreciated

Source code Java:

import java.util.Scanner;
import java.text.NumberFormat;

public class InvoiceApp {

public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String choice = "y";

while (!choice.equalsIgnoreCase("n")) {
// get the input from the user
System.out.print("Enter customer type (r/c): ");
String customerType = sc.next();
System.out.print("Enter subtotal: ");
double subtotal = sc.nextDouble();

// get the discount percent
double discountPercent = 0.0;
switch(customerType) {
case "r":
case "R":
if (subtotal < 100) {
discountPercent = 0.0;
} else if (subtotal >= 100 && subtotal < 250) {
discountPercent = .1;
} else if (subtotal >= 250) {
discountPercent = .2;
}
break;
case "c":
case "C":
if (subtotal < 250) {
discountPercent = .2;
} else if (subtotal >= 250) {
discountPercent = .3;
}
break;
default:
discountPercent = .1;
break;
}

// calculate the discount amount and round to 2 decimals
double discountAmount = subtotal * discountPercent;
discountAmount = Math.ceil(discountAmount * 100) / 100;

// calculate the total
double total = subtotal - discountAmount;

// format and display the results
NumberFormat currency = NumberFormat.getCurrencyInstance();
NumberFormat percent = NumberFormat.getPercentInstance();
System.out.println(
"Discount percent: " + percent.format(discountPercent) + "\n"
+ "Discount amount: " + currency.format(discountAmount) + "\n"
+ "Total: " + currency.format(total) + "\n");

// see if the user wants to continue
System.out.print("Continue? (y/n): ");
choice = sc.next();
System.out.println();
}
}
}

Answer 1

I've added the debugged code below and boldened the modifications.

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//----------------------------OUTPUT---------------------------------------------

Enter customer type (1/c): I Enter subtotal: $1000 Exception in thread "main" java.util.Input MismatchException at java.base/java.util.Scanner.throwlor (Scanner.java:939) at java.base/java.util.Scanner.next(Scanner.java:1594) at java.base/java.util.Scanner.nextDouble (Scanner.java:2564) at Main-main (Main.java:22) exit status 1

---- OUTPUT with debugged code ------

Enter customer type (1/c): I Enter subtotal: 1000$ Error! Invalid number.Try again. Enter customer type (1/c): C Enter subtotal: 1000 Discount percent: 30% Discount arcount: $300.00 Total: $700.00 Continue? (y/n): n

//-------------------------------------------------------------------------

import java.util.InputMismatchException;

import java.util.Scanner;

import java.text.NumberFormat;

public class InvoiceApp {

    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        String choice = "y";

        while (!choice.equalsIgnoreCase("n")) {

            // get the input from the user

            System.out.print("Enter customer type (r/c): ");

            String customerType = sc.next();

            double subtotal = 0.0;

            // try block for exception

            try {

                // prompts the user and takes input

                System.out.print("Enter subtotal: ");

                subtotal = sc.nextDouble();

            } catch (InputMismatchException e) {

                // reads and discards the invaid string

                sc.next();

                System.out.println("Error! Invalid number.Try again.\n");

                // start the loop again

                continue;

            }

            // get the discount percent

            double discountPercent = 0.0;

            switch (customerType) {

            case "r":

            case "R":

                if (subtotal < 100) {

                    discountPercent = 0.0;

                } else if (subtotal >= 100 && subtotal < 250) {

                    discountPercent = .1;

                } else if (subtotal >= 250) {

                    discountPercent = .2;

                }

                break;

            case "c":

            case "C":

                if (subtotal < 250) {

                    discountPercent = .2;

                } else if (subtotal >= 250) {

                    discountPercent = .3;

                }

                break;

            default:

                discountPercent = .1;

                break;

            }

            // calculate the discount amount and round to 2 decimals

            double discountAmount = subtotal * discountPercent;

            discountAmount = Math.ceil(discountAmount * 100) / 100;

            // calculate the total

            double total = subtotal - discountAmount;

            // format and display the results

            NumberFormat currency = NumberFormat.getCurrencyInstance();

            NumberFormat percent = NumberFormat.getPercentInstance();

            System.out.println("Discount percent: " + percent.format(discountPercent) + "\n" + "Discount amount: "

                    + currency.format(discountAmount) + "\n" + "Total: " + currency.format(total) + "\n");

            // see if the user wants to continue

            System.out.print("Continue? (y/n): ");

            choice = sc.next();

            System.out.println();

        }

    }

}

//---------------------------------------------------------------