Please also view images ( I really need help comparable interface, compareTo, part b, and part c)The main idea behind this activity is to extend Project 1. Create a system that allows a bookstore owner to keep track of their inventory and members utilizing inheritance. In this checkpoint, you will be expanding the previous assignment in two significant ways. This assumes you have a working version of the Bookstore project from the previous assignment. RecapThe same rules apply from Project 1:The owner of a bookstore has asked for your help designing a system that allows them to keep track of the store’s inventory and members. The owner provides you with the following details about what their store currently offers:The store sells three types of products: books, CDs, and DVDs.The store offers two types of memberships to customers: regular memberships and premium memberships. The regular membership is free, while the premium members pay a fee every month.The store keeps track of whether the monthly fee is due or has been paid for their premium members The store keeps track of the members and their transactions (number of items purchased, total purchases, ...) regardless if they are regular or premium members.The store also keeps track of the inventory of each product. Update your design to utilize inheritance when representing the different items the store sells.At a minimum your design should incorporate a Product class that is sub-classed into the threedifferent items available for purchasing - books, CDs, and DVDs.The Product class must be an abstract class that implements the Comparable interface. Sincewe never really need to instantiate objects of the type Product it makes it a good candidate forabstraction. When comparing products we want that to be either based on the price of theproduct or the amount in stock. Choose one of those attributes and implement the compareTomethod to work based on that field.Part B - More Interfaces (10 points)In this part you want to update your Bookstore program to implement the following interface:BookStoreSpecificationpublic interface BookstoreSpecification {}/*** given a product id and a product quantity, update* stock by adding amount to existing product quantity** @param productId* @param amount* @return*/public int restockProduct (int productId, int amount);/*** calculate and return dollar amount for current inventory of products* that is in stock** @return total in stock value*/public double inventoryValue(); }public double inventoryValue();Notice that this interface has only two methods: restockProduct (int, int) and inventoryValue().If you have a Bookstore class this might be a good option to implement this interface. Whereyou implement this is highly dependent on your project design. You might have a separateinventory management class that might be a better place to implement this interface. Keep inmind that with computational problem solving and design there are many ways of achieving asolution. Explore and have fun with it!Part C- Changing the Test Harness (6 points)Update your Test Harness class to include menu options to test the functionality added in PartsA (Comparing products) and B (restock a product and display inventory total). Keep in mindhere that you can add helper methods to your class to make the code cleaner and easier todebug.Part D-Coding Style and Documentation (4 points)This grade is awarded for proper coding styles. This includes:• Appropriate prompts and informative output●• Appropriate method, variable and object names• Proper indentationProper java documentation• Good commenting (explains what code is doing)Well-organized, elegant solution●Submission Requirements:1. Submit your project export (lastNameFirstNameProject2.zip) that includes your program tofulfill the requirements.

Please also view images ( I really need help comparable interface, compareTo, part b, and part c) The main idea behind this activity is to extend Project 1. Create a system that allows a bookstore owner to keep track of their inventory and members utilizing inheritance. In this checkpoint, you will be expanding the previous assignment in two significant ways. This assumes you have a working version of the Bookstore project from the previous assignment. Recap The same rules apply from Project 1: The owner of a bookstore has asked for your help designing a system that allows them to keep track of the store’s inventory and members. The owner provides you with the following details about what their store currently offers: The store sells three types of products: books, CDs, and DVDs. The store offers two types of memberships to customers: regular memberships and premium memberships. The regular membership is free, while the premium members pay a fee every month. The store keeps track of whether the monthly fee is due or has been paid for their premium members The store keeps track of the members and their transactions (number of items purchased, total purchases, ...) regardless if they are regular or premium members. The store also keeps track of the inventory of each product.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

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Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Recap

The same rules apply from Project 1:

The owner of a bookstore has asked for your help designing a system that allows them to keep track of the store’s inventory and members. The owner provides you with the following details about what their store currently offers:

The store sells three types of products: books, CDs, and DVDs.
The store offers two types of memberships to customers: regular memberships and premium memberships. The regular membership is free, while the premium members pay a fee every month.
The store keeps track of whether the monthly fee is due or has been paid for their premium members
The store keeps track of the members and their transactions (number of items purchased, total purchases, ...) regardless if they are regular or premium members.
The store also keeps track of the inventory of each product.

Update your design to utilize inheritance when representing the different items the store sells.
At a minimum your design should incorporate a Product class that is sub-classed into the three
different items available for purchasing - books, CDs, and DVDs.
The Product class must be an abstract class that implements the Comparable interface. Since
we never really need to instantiate objects of the type Product it makes it a good candidate for
abstraction. When comparing products we want that to be either based on the price of the
product or the amount in stock. Choose one of those attributes and implement the compareTo
method to work based on that field.
Part B - More Interfaces (10 points)
In this part you want to update your Bookstore program to implement the following interface:
BookStoreSpecification
public interface BookstoreSpecification {
}
/**
* given a product id and a product quantity, update
* stock by adding amount to existing product quantity
*
* @param productId
* @param amount
* @return
*/
public int restockProduct (int productId, int amount);
/**
* calculate and return dollar amount for current inventory of products
* that is in stock
*
* @return total in stock value
*/
public double inventoryValue();

}
public double inventoryValue();
Notice that this interface has only two methods: restockProduct (int, int) and inventoryValue().
If you have a Bookstore class this might be a good option to implement this interface. Where
you implement this is highly dependent on your project design. You might have a separate
inventory management class that might be a better place to implement this interface. Keep in
mind that with computational problem solving and design there are many ways of achieving a
solution. Explore and have fun with it!
Part C- Changing the Test Harness (6 points)
Update your Test Harness class to include menu options to test the functionality added in Parts
A (Comparing products) and B (restock a product and display inventory total). Keep in mind
here that you can add helper methods to your class to make the code cleaner and easier to
debug.
Part D-Coding Style and Documentation (4 points)
This grade is awarded for proper coding styles. This includes:
• Appropriate prompts and informative output
●
• Appropriate method, variable and object names
• Proper indentation
Proper java documentation
• Good commenting (explains what code is doing)
Well-organized, elegant solution
●
Submission Requirements:
1. Submit your project export (lastNameFirstNameProject2.zip) that includes your program to
fulfill the requirements.

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