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Java Java Objects (Retired) Delivering the MVP Defaulting Parameters

hi guys can someone post his answer for this challenge

please if someone do it try to post it

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, 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;
  }
}

2 Answers

Alexander Nikiforov
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Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

Make sure you check all Community answers before, there a ton of answers there, waiting for you to understand how to solve the challenge:

In order to see them click on "Defaulting Parameters" right above your question title in line of

Java -> Java -> Objects -> Delivering the MVP -> Defaulting Parameters

Here is direct link just in case

https://teamtreehouse.com/community/code-challenge:6032

Here are the nice answers from there

https://teamtreehouse.com/community/i-dont-get-what-i-am-supposed-to-do-here

Chris Jones
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Chris Jones
Java Web Development Techdegree Graduate 23,933 Points

I feel like I cheated, but I overloaded the addItem method by adding the method below to ShoppingCart.java.

 public void addItem(Product item) {
    System.out.printf("Adding %d of %s to the cart.%n", 1, item.getName());
    /* Other code omitted for clarity. Please imagine
       lots and lots of code here. Don't repeat it. 
    */
  }

You can read about overloading methods here.

Alexander Nikiforov
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.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

The point of this challenge was to re-use addItem method

  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. 
    */
  }

Do you see that " Other code omitted for clarity." You cannot just copy paste comment, you have to actually re-use method:

  public void addItem(Product item) {
    // this way no matter how many lines of code were inside "addItem"
    // for any quantity, we re-used them
    addItem(item, 1);
  }

Do you see the difference ?