This assignment is for SharpCoder

Inheritance and Interfaces

Overview In this homework, you will implement a system that

• reads in an inventory file,

• prints the inventory to the console, and

• ships items.

It requires you to use Java classes and interfaces rather than static functions as we did in previous

homework.

Basic Application In this homework, you will create the basic application that reads input from a datafile and writes

the results to the console. In the next homework, you will enhance the application by adding

database functionality.

Program Flow The following pseudocode shows the required flow of the program.

Begin

For each line in inventory file do

determine inventory type

based on type, create object to hold data

(FoodItem or Household Item)

populate item with appropriate data (weight, etc)

Store in inventory list

End

For each item in inventory list do

print item

End

For each household item in inventory do

determine shipping cost

print shipping cost

End

End

Program Output

For the supplied input file, the output should be as shown below (dates will be different!)

Item banana

-- Shelf Life: 5

-- Remove from Shelf: Thu Mar 12 22:07:56 CDT 2015

-- Calories: 200.00

Item bread

-- Shelf Life: 10

-- Remove from Shelf: Tue Mar 17 22:07:56 CDT 2015

-- Calories: 120.00

Item toaster

-- Weight: 5

Item washer

-- Weight: 200

Item toaster shipped. Shipping cost is $100.00

Item washer shipped. Shipping cost is $4,000.00

Business Rules There are two types of items tracked in the system: food items and household (durable) items.

• Food Items Food items are edible (we hope!) and perishable. An edible item has calories, while a perishable

item has a limited shelf life. The item must be removed from the shelf when it expires. The expi-

ration date is simply

expiration date = date placed in inventory + shelf life in days

• Household Items Household items have unlimited shelf life, so they do not have an expiration date. They do have

(sometimes substantial) weight. Their weight is taken into account when determining the ship-

ping cost. The shipping cost is also higher when the item is shipped on the weekend.

UML Diagram The classes and interfaces required for the application have been defined for you, and are shown

in the diagram below. Dotted lines indicate interfaces while solid lines indicate inheritance. Your

application must implement all classes and interfaces as shown.

Javadoc The Javadoc for the application has been generated for you and is available as a

zip file. Unzip the file into a directory and then open the file index.html to view the

documentation.