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Start your free trialcoskun olcucu
5,340 PointsMy code 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;
}
private String normalizeDiscountCode(String discountCode) {
char [] ch=discountCode.toCharArray();
for(int i=0; i<ch.length; i++) {
if(ch[i]!='$'|| !Character.isLetter(ch[i])) {
throw new IllegalArgumentException("Invalid code");
}
}
return discountCode.toUpperCase();
}
public void applyDiscountCode(String discountCode) {
this.discountCode=normalizeDiscountCode(discountCode);
}
}
Can you look up normalizeDiscountCode method that is supposed to throw an error message if the character is either '$' nor number.
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;
}
private String normalizeDiscountCode(String discountCode){
char [] ch=discountCode.toCharArray();
for(int i=0; i<ch.length; i++) {
if(ch[i]!='$' || !(Character.isLetter(ch[i]))) {
throw new IllegalArgumentException("Invalid code");
}
}
return discountCode.toUpperCase();
}
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(); // $ALE
try {
// This will throw an exception because it contains numbers
order.applyDiscountCode("ABC123");
} catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
try {
// This will throw as well, because it contains a symbol.
order.applyDiscountCode("w@w");
}catch (IllegalArgumentException iae) {
System.out.println(iae.getMessage()); // Prints "Invalid discount code"
}
}
}
2 Answers
Timothy Hilley
2,292 Points public void applyDiscountCode(String discountCode) {
discountCode = normalizeDiscountCode(discountCode);
this.discountCode = discountCode;
}
private String normalizeDiscountCode(String code) {
String normalizedCode = code.toUpperCase();
if(!normalizedCode.matches("^[A-Z$]+$")) { ^ = from the beggining +$ to the end of each word allow "[these]" only
throw new IllegalArgumentException("Invalid Discount Code");
}
return normalizedCode;
}
coskun olcucu
5,340 PointsFirst of all, thank you for your response. How about my code inside my code i convert the string an array of character and for loop is checking every character inside the for loop.What is the logical mistake on my code?