Java Java Objects Delivering the MVP Applying a Discount Code

help me with this problem

there is a compiler error, help me with this.
public class Order {
  private String itemName;
  private int priceInCents;
  private String discountCode;

  public Order(String itemName, int priceInCents) {
    this.itemName = itemName;
    this.priceInCents = priceInCents;

  public String getItemName() {
    return itemName;

  public int getPriceInCents() {
    return priceInCents;

  public String getDiscountCode() {
    return discountCode;

  public void applyDiscountCode(String discountCode) {
    this.discountCode = normalizeDiscountCode(discountCode);
  private String normalizeDiscountCode(String discountCode) {
     if (! Character.isLetter(discountCode)) {
      throw new IllegalArgumentException(" A letter is required");
     discountCode =  discountCode.toUpperCase();
    return  discountCode;
public class Example {

  public static void main(String[] args) {
    // This is here just for example use cases.

    Order order = new Order(
            "Yoda PEZ Dispenser",

    // These are valid.  They are letters and the $ character only
    order.getDiscountCode(); // ABC

    order.getDiscountCode(); // $ALE

    try {
      // This will throw an exception because it contains numbers
    } catch (IllegalArgumentException iae) {
      System.out.println(iae.getMessage());  // Prints "Invalid discount code"
    try {
      // This will throw as well, because it contains a symbol.
    }catch (IllegalArgumentException iae) {
      System.out.println(iae.getMessage());  // Prints "Invalid discount code"


1 Answer

Steven Parker
Steven Parker
200,775 Points

The instructions say the new method "should take the discount code that is passed into the method and return the uppercase version."

So you don't need to test anything, or throw an exception. Just remove that extra code and you'll pass task 1.