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Start your free trialSamuel Zink
5,498 Pointsmmm...I ran order.applyDiscountCode("h1!") and I expected it to throw an IllegalArgumentException, but it didn't
Anything helps
public class Order {
private String itemName;
private int priceInCents;
private String discountCode;
private String normalizeDiscountCode(String discountCode) {
for (char values : discountCode.toCharArray()){
if (Character.isLetter(values) && discountCode.indexOf("$") != -1) {
throw new IllegalArgumentException("Invalid discount code");
}
}
this.discountCode = discountCode;
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);
}
}
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(); // $ALE
try {
// This will throw an exception because it contains numbers
order.applyDiscountCode("ABC123");
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
try {
// This will throw as well, because it contains a symbol.
order.applyDiscountCode("w@w");
}catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
1 Answer
Trent Christofferson
18,846 PointsIn the normalizeDiscountCode method, an exception will only be thrown if the character is a letter and the string contains a '$' character. Since "h1!" doesn't contain a '$' character it will always be false.
To fix this you should first move: discountCode.indexOf("$") != -1
outside of the loop because it is checking it for every character. If the discount code is only supposed to have characters you need to replace Character.isLetter(values)
with !Character.isLetter(values)