Thread: problem with my class

I have a question about my code I'm trying for the exercise.

It says "Error, cannot load ValidatedInvoiceApp." What's wrong?

package java;
import java.text.NumberFormat;
import java.util.Scanner;
 
public class ValidatedInvoiceApp
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String choice = "y";
 
 
        while (!choice.equalsIgnoreCase("n"))
        {
 
            boolean isValid = false;
            while(isValid == false){
 
            // get the input from the user
            System.out.print("Enter customer type (r/c): ");
             String customerType = "r, c";
             if (sc.hasNext("r,c"))
            {
 
                isValid = true;
            }else
                {
                    System.out.println("error! Invalid number.Try again.");
                }
                sc.nextLine();//discard anything on the line
 
 
            System.out.print("Enter subtotal:   ");
            double subtotal = sc.nextDouble();
 
 
 
 
 
            // get the discount percent
            double discountPercent = 0;
            if (customerType.equalsIgnoreCase("R"))
            {
                if (subtotal < 100) {
                    discountPercent = 0;
                }
                else if (subtotal >= 100 && subtotal < 250) {
                    discountPercent = .1;
                }
                else if (subtotal >= 250) {
                    discountPercent = .2;
                }
            }
            else if (customerType.equalsIgnoreCase("C"))
            {
                if (subtotal < 250) {
                    discountPercent = .2;
                }
                else {
                    discountPercent = .3;
                }
            }
            else {
                discountPercent = .1;
            }
 
            // calculate the discount amount and total
            double discountAmount = subtotal * discountPercent;
            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();
 
                }
            }
 
 
       }
 
}

Now it's giving me errors I don't understand.

java.lang.SecurityException: Prohibited package name: java
at java.lang.ClassLoader.preDefineClass(ClassLoader.j ava:649)
at java.lang.ClassLoader.defineClass(ClassLoader.java :785)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:449)
at java.net.URLClassLoader.access$100(URLClassLoader. java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 361)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:4 23)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 56)
at sun.launcher.LauncherHelper.checkAndLoadMain(Launc herHelper.java:480)
Exception in thread "main" Java Result: 1

package java;
import java.text.NumberFormat;
import java.util.Scanner;
 
public class ValidatedInvoiceApp
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String choice = "y";
 
 
        while (!choice.equalsIgnoreCase("n"))
        {
            String customerType = "r, c";
            System.out.print("Enter customer type (r/c): ");
 
 
             if (sc.hasNext(customerType)) 
             {
                 customerType = sc.next();
             }else
             {
                 sc.nextLine();//discard anything on the line
                 System.out.println("error! Invalid number.Try again.");
                 continue;
             }
 
 
              System.out.print("Enter subtotal:   ");
                double subtotal = sc.nextDouble();
 
 
 
 
 
 
            // get the discount percent
            double discountPercent = 0;
            if (customerType.equalsIgnoreCase("R"))
            {
                if (subtotal < 100) {
                    discountPercent = 0;
                }
                else if (subtotal >= 100 && subtotal < 250) {
                    discountPercent = .1;
                }
                else if (subtotal >= 250) {
                    discountPercent = .2;
                }
            }
            else if (customerType.equalsIgnoreCase("C"))
            {
                if (subtotal < 250) {
                    discountPercent = .2;
                }
                else {
                    discountPercent = .3;
                }
            }
            else {
                discountPercent = .1;
            }
 
            // calculate the discount amount and total
            double discountAmount = subtotal * discountPercent;
            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();
 
             } 
 
            }
 
 
            }

nvm guys, I apologize. i messed with it enough and figured it out. i couldn't use a package with java as the name.

package newstuff;
import java.text.NumberFormat;
import java.util.Scanner;
 
public class tryValidatedInvoiceApp
{
    public static void main(String[] args)
    {
        Scanner sc = new Scanner(System.in);
        String choice = "y";
 
 
        while (!choice.equalsIgnoreCase("n"))
        {
 
            System.out.print("Enter customer type (r/c): ");
            String customerType = sc.next();
 
             if (customerType.equals("r"))
 
             {
 
 
 
              System.out.print("Enter subtotal:   ");
                double subtotal = sc.nextDouble();
 
 
 
 
 
 
            // get the discount percent
            double discountPercent = 0;
             if (customerType.equalsIgnoreCase("C"))
            {
                if (subtotal < 250) {
                    discountPercent = .2;
                }
                else {
                    discountPercent = .3;
                }
            }
            else {
                discountPercent = .1;
            }
 
            // calculate the discount amount and total
            double discountAmount = subtotal * discountPercent;
            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();
 
             }else if(customerType.equals("c"))
 
             {
 
 
 
              System.out.print("Enter subtotal:   ");
                double subtotal = sc.nextDouble();
 
 
 
 
 
 
            // get the discount percent
            double discountPercent = 0;
            if (customerType.equalsIgnoreCase("R"))
            {
                if (subtotal < 100) {
                    discountPercent = 0;
                }
                else if (subtotal >= 100 && subtotal < 250) {
                    discountPercent = .1;
                }
                else if (subtotal >= 250) {
                    discountPercent = .2;
                }
            }
 
 
            // calculate the discount amount and total
            double discountAmount = subtotal * discountPercent;
            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();
 
 
 
 
 
 
             } else
		             {
		                 sc.nextLine();//discard anything on the line
		                 System.out.println("error! Invalid number.Try again.");
                 continue;}
 
            }
 
 
            }
 
}