Reference no: EM1365946
CSE-241 Advance Programming Concepts
Point of Sale Terminal
In this assignment you will be tested on the concepts related to the basic syntax, file I/O, collections and other utilities in Java.
Problem Statement
The problem statement is pretty simple. We need a software implementation of a Point of Sale terminal at a typical store. The users of the system are the cashiers sitting at the sales terminals of the store. The users can use the system to manage sales items in the store, customer details and of course the sales. The system should be capable of presenting some reports related to the sales, items and customers. All data should be stored in flat file system. You’ll come to know about the details later in this handout.
User Interface
You are not put in the trouble of creating some fancy GUIs at the moment. What you are supposed to do is to develop a simple console based system. When the system starts the user is presented with the main menu as follows:
Main Menu
1- Manage Items
2- Manage Customers
3- Make New Sale
4- Make Payment
5- Print Reports
6- Exit
Press 1 to 5 to select an option:
The user selects his/her desired option by pressing one of the numbers from 1 to 5. Upon selecting an option from the main menu the system presents user with a corresponding sub menu. The details are as follows:
Items Menu
1- Add new Item
2- Update Item details
3- Find Items
4- Remove Existing Item
5- Back to Main Menu
Press 1 to 5 to select an option:
Customers Menu
1- Add new Customer
2- Update Customer details
3- Find Customer
4- Remove Existing Customer
5- Back to Main Menu
Press 1 to 5 to select an option:
Reports Menu
1- Stock in hand
2- Outstanding orders
3- Customer Balance
4- Sales Receipts
5- Back to Main Menu
Press 1 to 5 to select an option:
Items Menu
When the user selects the “Manage Items” option from the main menu he/she is presented with the “Items Menu”.
The user is allowed to add new Item, update Item information and to search for Items and also remove an existing Item.
Add New Item
When the user selects add new Item option, he is presented with the system generated (new) Item Id and then prompts the user to enter the following information of the Item:
Description, Price, Quantity
Upon getting all info the system confirms from the user to save the info and then if the user confirms the system saves the info to file shows confirmation message (e.g. Item Information successfully saved) and again the Item Menu.
Note that when a new customer is added the creation date will be the current date to be stored in the file.
Modify Item Details
The system asks user to enter Item Id and then if found displays the item data. Then the system asks user to enter the item details which he wants to modify and to leave blank otherwise.
Upon getting all info the system confirms from the user to save the info and then if the user confirms the system saves the info to file shows confirmation message (e.g. Item Information successfully saved) and again the Item Menu.
Find Item
The system asks the user to enter any of the item info and then finds the item from the file according to the given information. The user can leave blank the fields he/she does not want in the search criteria.
e.g. the screen presented should look like this:
Please specify atleast one of the following to find the item. Leave all fields blank to return to Customers Menu:
Item ID:
Description:
Price:
Quantity:
Creation Date:
3CSE-241 Advance Programming Concepts
If the item is found then its details are displayed or an appropriate message is displayed
on the screen. Following output is shown to the user:
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Item ID Description Price Quantity
----------------------------------------------------------------------------------------------------------
1 HP Printer 10,000 150
2 Focus Keyboard 500 200
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Remove Existing Item
User enters the “Item ID“ and if a valid item id exist then a confirmation from the user is
asked. After confirmation the specified “Item ID” is removed from the file.
Note that an item should only be allowed to remove if there is no recorded sale for the
item at the moment and appropriate message should be displayed to the user for those
items.
Customers Menu
When the user selects the “Manage Customers” option from the main menu he/she is
presented with the “Customers Menu”.
The user is allowed to add new customers, update their information and to search for
customers and also remove an existing customer.
Add New Customer
When the user selects add new customer option, he is presented with the system
generated (new) Customer Id and then prompts the user to enter the following
information of the customer:
Name, Address, Phone and Email, Sales Limit
Upon getting all info the system confirms from the user to save the info and then if the
user confirms the system saves the info to file shows confirmation message (e.g.
Customer Information successfully saved) and again the Customers Menu.
Note that when a new customer is added his payable amount will be zero.
Modify Customer Details
The system asks user to enter Customer Id and then if found displays the customer data.
Then the system asks user to enter the customer details which he wants to modify and to
leave blank otherwise.
4CSE-241 Advance Programming Concepts
Upon getting all info the system confirms from the user to save the info and then if the
user confirms the system saves the info to file shows confirmation message (e.g.
Customer Information successfully saved) and again the Customers Menu.
Find Customer
The system asks the user to enter any of the customer info and then finds the customer
from the file according to the given information. The user can leave blank the fields
he/she does not want in the search criteria.
e.g. the screen presented should look like this:
Please specify atleast one of the following to find the customer. Leave all fields blank to
return to Customers Menu:
Customer ID:
Name:
Email:
Phone:
Sales Limit:
If the customer is found then his details are displayed or an appropriate message is
displayed on the screen. Following output is shown to the customer:
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Customer ID Name Email Phone Sales Limit
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1 Ali Aslam ali @ email.com 03001234567 650.00
2 Bilal Basit bilal @l email.com 03337654321 790.00
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Remove Existing Customer
User enters the “Customer ID“ and if a valid customer id exist then a confirmation from
the user is asked. After confirmation the specified “Customer ID” is removed from the
file.
Note that a “Customer ID” which is associated with any sales cannot be removed from
the system and appropriate message should be displayed to the user.
Make New Sale
When the user selects the “Make New Sale” option from the Main Menu, the screen
appears with the sale date/time and serial number of the new sale. The cashier is
prompted to enter the “CustomerID” and system waits for input from the cashier.
5CSE-241 Advance Programming Concepts
Example screen:
Sales Date: 05/06/2006
Enter Customer ID: 2
The cashier is then asked to add items for this sales.He is prompted to enter "ItemID" and
system waits for input from the cashier. As soon as the cashier enters ItemID, system
displays item “Description” and “Price” if a correct ItemID is found and prompts cashier
to enter “Quantity”.
Example screen:
Item Id: 123
Description: Java: The Complete Reference
Price: Rs. 650.00
Quantity: 1
Sub-Total: Rs. 650.00
Press 1 to Enter New Item
Press 2 to End Sale
Press 3 to Remove an existing Item from the current sale
Press 4 to Cancel Sale
Choose from option 1 – 4:
Note: Text in red represents user input and in green represent system generated output.
Enter New Item
When the user types “1”, the system responds by prompting user once again for new Item
Id as before and upon entry of each new item the system displays the “Total amount
payable”.
The process of entering new items will continue until all items have been processed at
which point the cashier selects the "End Sale" option by typing “2”.
End Sale
This system operation will involve computing the total for the sale and communicating it
to the user by displaying on the console. Following out should be displayed after ending
the sale:
6CSE-241 Advance Programming Concepts
Sales ID: 1 Customer ID: 2
Sales Date: 06/05/2006 Name: Javed Ahmed
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Item Id Description Quantity Amount
----------------------------------------------------------------------------------------------------------
1 Java: Complete Reference 1 650.00
2 Bioinformatics Algorithms 1 790.00
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Total Sales: Rs. 1440.00
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Press any key to continue….
The user will be taken to the Main Menu after ending the sale. Note that the total sales for
a single day for a single customer should not exceed the sale limit of the customer.
Note that every new sale created against a customer will increase the customer balance by
the sales amount.
Make Payment
The system prompts the user to enter the “Sales ID” and if a valid “Sales ID” is given
then following output is shown:
Sale ID: 3
Customer Name: Ali Ahmed
Total Sales Amount: 30,000
Amount Paid: 17,550
Remaing Amount: 12,450
Amount to be Paid: 10,000
In the above output the user will enter the amount to be paid for making the payments
against the sale. Following action will be taken after a payment is entered:
• A new payment will be recorded
• Customer balance will be decreased for the associated customer
Note that the amount paid is calculated using the sum of all amounts of receipts of given
“Sales ID”.
View Reports
7CSE-241 Advance Programming Concepts
If the user selects view reports then he/she should be asked to specify one of the
following reports:
1- Stock in Hand
2- Customer Balance
3- Sales Report (by date)
4- Outstandinding Sales (by Date)
Stock in hand
The user is asked for an “Item ID” range as an input. Then, he is presented with a
summary of stock in hand as follows:
Date: 10/10/2006 11:59AM
----------------------------------------------------------------------------------------------------------
ItemId Description Price Quantity in Hand
-----------------------------------------------------------------------------------------------------------
123 Java: The Complete Reference 650.00 150
124 Bioinformatics Algorithms 790.00 65
…
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Customer Balance
The user is prompted for Customer Id and if the customer is found then his personal
information and the balance is presented to the user:
Please enter Customer Id: 123
Customer Name: Mr. Bilal Afzal
Address: 145A, Garden Town, Lahore
Phone: 04258858858
Email: [email protected]
Balance: Rs. 1000.00
Sales Report
The user is prompted for two dates to specify the period for which the report is to be
generated. If the user leaves bland one of the dates then the report is printed for a single
day. The report format is as follows:
8CSE-241 Advance Programming Concepts
Sales Report
From: 10/09/2006 To: 15/09/2006
------------------------------------------------------------------------------------------------------------
Item Id Description Quantity Sold Amount
------------------------------------------------------------------------------------------------------------
123 Java: The Complete Reference 20 1300.00
124 Bioinformatics Algorithms 15 11850.00
… …. ….
… ….
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Total Sale: Rs. 50000.00
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Outstanding Sales
The user is prompted for two dates to specify the period for which the report is to be
generated. If the user leaves bland one of the dates then the report is printed for a single
day. The report format is as follows:
Outstanding Orders
From: 10/09/2006 To: 15/09/2006
-----------------------------------------------------------------------------------------------------------
Sales ID Customer Name Total Amount Remaining Amount
------------------------------------------------------------------------------------------------------------
123 Mohammad Atif 25,000 15,000
124 Imran Shafi 1,500 750
… …. ….
… ….
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Total Remaining Amount: Rs. 50000.00
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9CSE-241 Advance Programming Concepts
Design Information and Requirements
? Use flat file systems to store all data the format of the files is given below but
broadly you should have one file for customer information, second for items
information, third for sales and fourth for receipts.
? You should also have different classes for: Customer, Item and Sale. Make sure
you separate the implementation from the interface completely because we are
going to ask you to give the same assignment with GUI features later on.
? All data entry points should have proper error checks and error messages.
? All data entry is through command line interface.
? There must be proper commenting through out your code and you have to
generate Java Doc for your project.
? The code should be well indented and easy to read as your marking depends a lot
on this.
File System
The data to be preserved in files is given below:
Item (ItemId, Description, Price, Quantity, CreationDate)
Customer (CustomerId, Name, Address, Phone, Email, AmountPayable, Sales Limit)
Sale (OrderId, CustomerId, Date, Status)
SaleLineItem (LineNo, OrderId, ItemId, Quantity, Amount)
Receipt (ReceiptNo, ReceiptDate, OrderNo, Amount)
The underlined attributes are unique (key attributes) and your system autogenerates these
numbers. You need to store all data in plain text files.
Example: Format of the Item file should be as given below:
<ItemId>;<Description>;<Price>;<Quantity>;<CreationDate>;