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Java Java Objects (Retired) Delivering the MVP Defaulting Parameters

Jeff Hill
Jeff Hill
751 Points

What am I missing?

java quiz

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

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

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".