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Java Java Objects (Retired) Delivering the MVP Defaulting Parameters

Jeff Hill
Jeff Hill
751 Points
Posted by Jeff Hill
Jeff Hill
751 Points

What am I missing?

java quiz

markmneimneh
markmneimneh
14,132 Points

What is the question? please post code and error so someone can help you

Alexander Davison
Alexander Davison
65,469 Points

Please provide your code.

You post code by wrapping ```java and ``` around your Java code.

Example:

```java

public class Hello {

public static void main(String[] args) {

System.out.println("Hello!");

}

}

```

(sorry as you see it it very hard to format code here)

The output will be (when you post your answer/comment):

// Watch out! This isn't the code that will pass the challenge,
// I'm just giving a demonstration on how to post code in the forums.

/*
-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
DON'T USE THIS CODE IN CHALLENGE!
-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/-/
*/

public class Hello {

    public static void main(String[] args) {
        System.out.println("Hello!");
    }

}

Thanks for understanding :)

1 Answer

Philip Gales
Philip Gales
15,193 Points
Philip Gales
Philip Gales
15,193 Points

Step 1. Remove the comment from the add item dispenser in 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); //remove comments <-----------------------------------------
  }

}

Step 2. Add a new method called addItem that only takes a Product object as the parameter. Then you call the original addItem method while passing a quantity of 1. 

public class ShoppingCart {

  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. 
    */
  }

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

This is often done in programs and is called method overloading. You can read about it by Googling "Java method overloading".