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Start your free trialHitesh Burla
2,552 PointsThrowing Illegal Argument not marking the task as done.
I was asked to throw an illegal argument when a string containing non characters or $ symbol is given as discount. I've done the required but it's not working.
public class Order {
private String itemName;
private int priceInCents;
private String discountCode;
public Order(String itemName, int priceInCents) {
this.itemName = itemName;
this.priceInCents = priceInCents;
}
private String normalizeDiscountCode(String discountCode) {
for(char letter: discountCode.toCharArray() ) {
if(!Character.isLetter(letter) || letter !='$') {
throw new IllegalArgumentException("Invalid discount code");
}
}
return discountCode.toUpperCase();
}
public String getItemName() {
return itemName;
}
public int getPriceInCents() {
return priceInCents;
}
public String getDiscountCode() {
return discountCode;
}
public void applyDiscountCode(String discountCode) {
String normalizedDiscountCode;
normalizedDiscountCode = normalizeDiscountCode(discountCode);
this.discountCode = normalizedDiscountCode;
}
}
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(); // $ALE
try {
// This will throw an exception because it contains numbers
order.applyDiscountCode("ABC123");
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
try {
// This will throw as well, because it contains a symbol.
order.applyDiscountCode("w@w");
}catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
Hitesh Burla
2,552 PointsLooks like the problem is with by if condition... when I changed it to if(!Character.isLetter(letter) && letter !='$'). It solved the issue.
1 Answer
Christian Damsgaard
4,239 PointsWhat you need to do is to change is the || in your if statement, to &&. By doing this you changes the statement from saying, "if one of the following statements is true, then throw the illegal argument", to "if both of these statements is true, then throw the illegal argument".
So change from:
private String normalizeDiscountCode(String discountCode) {
for(char letter: discountCode.toCharArray() ) {
if(!Character.isLetter(letter) || letter !='$') {
throw new IllegalArgumentException("Invalid discount code");
}
}
return discountCode.toUpperCase();
}
To:
private String normalizeDiscountCode(String discountCode) {
for(char letter: discountCode.toCharArray() ) {
if(!Character.isLetter(letter) && letter !='$') {
throw new IllegalArgumentException("Invalid discount code");
}
}
return discountCode.toUpperCase();
}
That should do the trick.
Hitesh Burla
2,552 PointsHitesh Burla
2,552 Pointstry { for(char letter: discountCode.toCharArray() ) { if(!Character.isLetter(letter) || letter !='$') { throw new IllegalArgumentException("Invalid discount code"); } } } catch(IllegalArgumentException iae) { System.out.printf("%s", iae.getMessage()); }
Even when I've updated this...it doesn't work!