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Hai Phan
2,442 PointsNeed help in challenge task 2
I think the logic is acceptable here. What is wrong with my code?
Note: there is no compiling error.
public class Order {
private String itemName;
private int priceInCents;
private String discountCode;
private String normalizeDiscountCode(String discountCode) {
for (char letter : discountCode.toCharArray()) {
if (! Character.isLetter(letter)) {
if (letter != '$'){
throw new IllegalArgumentException("Invalid discount code");
}
}
}
return this.discountCode = 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) {
try {
discountCode = normalizeDiscountCode(discountCode);
} catch(IllegalArgumentException ex) {
System.out.println(ex.getMessage());
}
this.discountCode = 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

Steven Parker
215,984 PointsYou got a bit too fancy in task 1 — the instructions did not ask you to use a "try/catch" in "applyDiscountCode".
But since you did, it handles the exception generated by the task 2 code. And that prevents the challenge from being able to confirm that the task 2 code is working.