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Java Java Objects (Retired) Delivering the MVP Defaulting Parameters

defaulting parameters - What im doing wrong in this challenge?

I put the helper method addItem before the method addItem and uncommented the line in Example.java, the challenge still asking me to uncomment and put first the Sistem.out Yoda Pez dispenser, i tryied and im stuck in this challenge.

Example.java
public class Example {

  public static void main(String[] args) {
    ShoppingCart cart = new ShoppingCart();
    Product pez = new Product("Cherry PEZ refill (12 pieces)");
    cart.addItem(pez, 5);
    /* Since a quantity of 1 is such a common argument when adding a product to the cart,
     * your fellow developers have asked you to make the following code work, as well as keeping
     * the ability to add a product and a quantity.
     */
    Product dispenser = new Product("Yoda PEZ dispenser");
    /* Uncomment the line following this comment,
       after adding a new method using method signatures,
       to solve their request in ShoppingCart.java
    */
    cart.addItem(dispenser);
  }

}
ShoppingCart.java
public class ShoppingCart {

  public void addItem(Product item){

  }

  public void addItem(Product item, int quantity) {
    System.out.printf("Adding %d of %s to the cart.%n", quantity, item.getName());
    /* Other code omitted for clarity. Please imagine
       lots and lots of code here. Don't repeat it. 
    */
  }
} 
Product.java
public class Product {
  /* Other code omitted for clarity, but you could imagine
     it would store price, options like size and color
  */
  private String mName;

  public Product(String name) {
      mName = name;
  }

  public String getName() {
      return mName;
  }
}

3 Answers

Hi,

the body of the addItem()method which takes one argument is empty. You need to put some code there. Otherwise the cart.addItem(dispenser); expression will not work.

It's almost the same body like in the addItem() method with two arguments. Because you add just one item with this method, you don't need the quantity there.

I added in ShoppingCart.class the system.out line like this and the challenge continue to say that i need to uncomment and the line in't printing.

  public void addItem(Product item) {
    System.out.printf("%s", item.getName());
  }

I put the output and still not working, this is the last challenge of this course for me to pass.

Liron Tal
Liron Tal
4,825 Points

They want you to still use "quantity" in the Printf.

Liron.

Ildar Gabitov
Ildar Gabitov
15,520 Points

Add to your ShoppingCart.java

public void addItem(Product item) { addItem(item, 1); }