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Start your free trialDaniel Hopson
22,898 Pointsthrow new IllegalArgumentException();
I don't understand why this doesn't work.
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;
}
public int getPriceInCents() {
return priceInCents;
}
public String getDiscountCode() {
return discountCode;
}
public void applyDiscountCode(String discountCode) {
this.discountCode = normalizeDiscountCode(discountCode);
}
private String normalizeDiscountCode(String discountCode) {
String str = discountCode.toUpperCase();
char[] charArray = str.toCharArray();
for (int i = 0; i < charArray.length; i++) {
char ch = charArray[i];
if (ch >= 'a' && ch <= 'z' || ch == '$') {
str = str;
} else {
throw new IllegalArgumentException("Invalid discount code");
}
}
return str;
}
}
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
231,172 PointsThe string is converted to upper case; but then each character is checked to see if it is between 'a' and 'z' (lower case), which it cannot be at this point.
The test should check for between 'A' and 'Z' instead.