Application do get crashed because it accept only integer/double value from user. So it throws InputMismatchException.
import java.util.Scanner;
public class InvoiceApp
{
public static void main(String[] args)
{
// welcome the user to the program
System.out.println(“Welcome to the Invoice Total Calculator”);
System.out.println(); // print a blank line
// create a Scanner object named sc
Scanner sc = new Scanner(System.in);
// perform invoice calculations until choice isn’t equal to “y” or “Y”
String choice = “y”;
while (choice.equalsIgnoreCase(“y”))
{
// get the invoice subtotal from the user
System.out.print(“Enter subtotal: “);
double subtotal = sc.nextDouble();
// calculate the discount amount and total
double discountPercent = 0.0;
if (subtotal >= 200)
discountPercent = .2;
else if (subtotal >= 100)
discountPercent = .1;
else
discountPercent = 0.0;
double discountAmount = subtotal * discountPercent;
double total = subtotal – discountAmount;
// display the discount amount and total
String message = “Discount percent: ” + discountPercent + “n”
+ “Discount amount: ” + discountAmount + “n”
+ “Invoice total: ” + total + “n”;
System.out.println(message);
// see if the user wants to continue
System.out.print(“Continue? (y/n): “);
choice = sc.next();
System.out.println();
}
}
}
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