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Start your free trialReagan Govender
845 PointsIf statement failing to pass while using string matches
Im sure my if statement is wrong but I have been looking at it for hours now and I just can figure it out.
public class Order {
private String itemName;
private int priceInCents;
private String discountCode;
private String normalizeDiscountCode(String discountCode) {
if (! discountCode.matches("[^A-Za-z]+$")) {
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);
}
}
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(); // $ALE
try {
// This will throw an exception because it contains numbers
order.applyDiscountCode("ABC123");
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
try {
// This will throw as well, because it contains a symbol.
order.applyDiscountCode("w@w");
}catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
1 Answer
Umesh Ravji
42,386 PointsHi Reagan, just two small issues, you are calling the match
method on a variable that doesn't exist, and your regular expression needs fixing too :)
^[A-Za-z$]+$
looks for anything that is either a alphabetic character or a dollar sign. The ^
must be at the front of the pattern, and not inside the square brackets (where it has a completely different meaning).
private String normalizeDiscountCode(String code) {
if (!code.matches("^[A-Za-z$]+$")) { // make sure you are calling the match method on the code variable
throw new IllegalArgumentException("Invalid discount code");
}
return code.toUpperCase();
}