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Java Java Objects Delivering the MVP Applying a Discount Code

Omar Amin
PLUS
Omar Amin
Courses Plus Student 1,194 Points

Oops! It looks like Task 1 is no longer passing.

Hi there, I am almost finishing the Java Objects course but this 'task 1 no longer passing' problem is stopping me from doing so. I am doing the 'Apply Discount Code' exercise and whenever I finish Task 2 this message pops up. Here is my code:

public class Order {
  private String itemName;
  private int priceInCents;
  private String discountCode;

  private String normalizeDiscountCode(String discountCode) {
    for(char item: discountCode.toCharArray()) {
      if(item != '$' ||  !Character.isLetter(item)) {
        throw new IllegalArgumentException("Invalid discount code");
    }
   }

  return   discountCode.toUpperCase();
  }

  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);

  }
}
Order.java
public class Order {
  private String itemName;
  private int priceInCents;
  private String discountCode;

  private String normalizeDiscountCode(String discountCode) {
    for(char item: discountCode.toCharArray()) {
      if(item != '$' ||  !Character.isLetter(item)) {
        throw new IllegalArgumentException("Invalid discount code");
    }
   }
  discountCode = discountCode.toUpperCase();
  return 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);

  }
}
Example.java
public class Example {

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

    Order order = new Order(
            "Yoda PEZ Dispenser",
            600);

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

    order.applyDiscountCode("$ale");
    order.getDiscountCode(); // $ALE


    try {
      // This will throw an exception because it contains numbers
      order.applyDiscountCode("ABC123");
    } catch (IllegalArgumentException iae) {
      System.out.println(iae.getMessage());  // Prints "Invalid discount code"
    }
    try {
      // This will throw as well, because it contains a symbol.
      order.applyDiscountCode("w@w");
    }catch (IllegalArgumentException iae) {
      System.out.println(iae.getMessage());  // Prints "Invalid discount code"
    }

  }
}
samiff
samiff
31,206 Points

Hello Omar,

You almost have it correct, the following logic in your code is a bit off though:

if(item != '$' ||  !Character.isLetter(item)) {

The || operator will evaluate to true if either side is correct. So as your code is now, any non $ character passed in will throw the exception.

Omar Amin
Omar Amin
Courses Plus Student 1,194 Points

It worked with the and operator, thanks samiff.