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Start your free trialSebastian García
959 PointsI don't understand what's wrog with my code ?
I've seen that other people are solving the problem with a For Statement and I don't understand why and I don't understand a lot of what it says in their code like this one: for(i=0; i<discountCode.length(); i++){ char ch = discountCode.charAt(i); if (! (Character.isLetter(ch)) || ch == '$')){ // double ' ) ' throw new IllegalArgumentException("Invalid discount code") I mean I could just copy this and that's it, but I want to understand why am I understanding a different instruction or what am I not understanding. Could somebody help me with 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;
}
public int getPriceInCents() {
return priceInCents;
}
public String getDiscountCode() {
return discountCode;
}
public void applyDiscountCode(String discountCode) {
this.discountCode = normalizeDiscountCode (discountCode);
}
private String normalizeDiscountCode (String discountCode) {
if (! Character.isLetter (letter | $)) {
throw new IllegalArgumentException("Invalid discount code");
}
return discountCode.toUpperCase();
}
}
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
Marie Franklin
13,355 PointsnormalizeDiscountCode method is not implemented in a right way
private String normalizeDiscountCode(String discountCode){
for(char letter: discountCode.toCharArray()){
if(!Character.isLetter(letter) && letter != 36){
throw new IllegalArgumentException("Invalid discount code.");
}
}
return discountCode.toUpperCase();
}
if you need more help, please post here in the Community :)