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Start your free trialMatthew Dorber
752 PointsStill struggling :(
I don't understand what's wrong with this?
If it's not a letter AND it's not a dollar sign - throw an exception.
So how is it not throwing an exception for 'h1!' ?
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;
}
private String normalizeDiscountCode(String discountCode)
{
for (char code : discountCode.toCharArray())
{
if ((!Character.isLetter(code)) && (discountCode.indexOf('$') == -1))
throw new IllegalArgumentException("Invalid discount code.");
}
return discountCode.toUpperCase();
}
public int getPriceInCents() {
return priceInCents;
}
public String getDiscountCode() {
return discountCode;
}
public void applyDiscountCode(String discountCode)
{
try
{
this.discountCode = normalizeDiscountCode(discountCode);
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
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(); // $ALE
try {
// This will throw an exception because it contains numbers
order.applyDiscountCode("ABC123");
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
try {
// This will throw as well, because it contains a symbol.
order.applyDiscountCode("w@w");
}catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
2 Answers
andren
28,558 PointsYour code is quite close, but there are two issues:
You should not be using the
indexOf
method to check for '$' but should just compare thecode
to it directly like this:code != '$'
. Otherwise your code will fail when it encounters a discount code featuring the '$' character.Your code does in fact raise an exception for
'h1!'
, the issue is that your code also catches that exception, which means that the challenge checker which runs your code does not get any indication that an exception occurred.
If you change how you deal with the $ character and remove the code that catches the exception, like 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;
}
private String normalizeDiscountCode(String discountCode)
{
for (char code : discountCode.toCharArray())
{
if ((!Character.isLetter(code)) && (code != '$'))
throw new IllegalArgumentException("Invalid discount code.");
}
return discountCode.toUpperCase();
}
public int getPriceInCents() {
return priceInCents;
}
public String getDiscountCode() {
return discountCode;
}
public void applyDiscountCode(String discountCode) {
this.discountCode = normalizeDiscountCode(discountCode);
}
}
Then your code will work.
Matthew Dorber
752 PointsThanks Andren! I can finally move forward with this.