what the type of normalizeDiscountCode method & why

Question

how take the discount code in the method.
```Order.java
public class Order {
  private String itemName;
  private int priceInCents;
  private String discountCode;
  private normalizeDiscountCode(){
  }
  public Order(String itemName, int priceInCents) {
    this.itemName = itemName;
    this.priceInCents = priceInCents;
  }
  public void applyDiscountCode(String discountCode) {
    this.discountCode = discountCode.isUpperCase();
  }
}
```

Steve Hunter · Accepted Answer

Hi there, 
The first part of this challenge has two steps. 
First, create the new private method called normalizeDiscountCode(). This returns a String and takes one parameter, which is also a String. 
You've got:
java
  private normalizeDiscountCode(){
  }

OK - so we need to add a return data type (String) so we get:
java
  private String normalizeDiscountCode(){
  }

And then we need a parameter - I'll call it discountCode since that's what it is:
java
  private String normalizeDiscountCode(String discountCode){
  }

So that's the method skeleton set out right. We now just need to have it actually return a string. The challenge tells us that we should return the discountCode in upper case. For that, we use a method called toUpperCase(), as we've seen in the videos. We have the discountCode (we passed it into the method, right?) so we just need to chain that method on to that, using dot notation, and return it.
java
  private String normalizeDiscountCode(String discountCode){
    return discountCode.toUpperCase();
  }

Sorted; that's step 1 done. 
Now, we need to use this new method in the applyDiscountCode() method. At the moment, that looks like this:
java
  public void applyDiscountCode(String discountCode) {
    this.discountCode = discountCode;
  }

So it is receiving a discount code and assigning that to the member variable of the class. We want to assign the returned string from normalizeDiscountCode into that. So, we call the method we just wrote and pass in the discountCode.  What comes back will be the upper case version (for now - there's more later) which we want to assign into this.discountCode in the same way as now. 
That look like:
java
  public void applyDiscountCode(String discountCode) {
    this.discountCode = normalizeDiscountCode(discountCode);
  }

That should get you through task one. 
Let me know how you get on. 
Steve.

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Abhilasha jangid

Abhilasha jangid

what the type of normalizeDiscountCode method & why

1 Answer

Steve Hunter

Steve Hunter