LAB EXERCISE 11:  Sales Amount

Goal: In this exercise, you will learn how to:
1.  Insert the Main Method (Main Entry Point to the Java Program)
2   Import a Java Class Library
3.  Declare Variables
4.  Create a Method which will return data
5.  Use the While Loop statement to test the conditional expression BEFORE each iteration.
6.  Use the Relational Operator in the While conditional expression
7.  Use an Increment Assignment Operator
8.  Use a Running Total
9.  Create an Object from the Class
10.Call the Object’s Method

Program Specifications:
Description: This program prompts the user to enter the daily sales amount from Monday (day 1) to Sunday (day 7).  The daily sales amount is accumulated using a running total.  The weekly sales total is then displayed on the console.

A.  Pre-requisites:
1. Create a folder on your desktop Exercise-11

2. Launch Java EE- Eclipse
Note:  You will need to use the Java Perspective Workbench for this exercise

3. Setup your Eclipse Workspace to point to the Exercise-11 folder
a. Select File-> Switch Workspace
b. Browse and select your Exercie-11 folder as your Workspace.

B. Requirements:

1.  Create a Java Project and name it as SalesAmount

2.  Create the first Class that will have the Main Method

a.       Name the Class as MainApp

b.       Choose the main method to insert into the class


3.  Create the second Class that will have the Constructor and Methods

a.      Name the Class as Sales

b.      Do not select the main method stub


C. Requirements for the Sales Class:

1.  Insert the import java.util.Scanner class which will allow data to be inputted from the console.


2.  a. Declare the variable- salesDailyAmount and  salesTotal using the double data type
b. Declare the variable- day using the integer data type and initialize to 1

3.  Create a Method called totalAmount () that will prompt the user to input the daily sales amount from Monday (day 1) to Sunday (day 7), accumulate the total sales and return the result.

a.  Declare the scanner input class objects - Scanner inputAmt = new Scanner(

b.  Used the While Loop to perform the following iteration:
1.  Prompt the user to input the daily sales amount
2.  Accumulate the total sales using a Running Total
3.  Increment the day of the week.
4.  Perform steps 1-3 until it reaches day 7.












c.  Close the scanner input class object

d.  Return the salesTotal result to the calling object’s method.






























D. Requirements for the MainApp Class:

1.  Add comments (documentation) – Program Description, Author and Date

2.  Create the instance of object called weeklyAmt from the Sales class

3.  Declare totalAmt variable as double and assign the return value from the weeklyAmt.totalAmount() object’s method

4.  Display the returned result on the console.  Below is the code you can copy and paste.

System.out.print("Total Weekly Sales Amount: ");
System.out.format("$%,.2f", totalAmt);

















E. Test:  

1.   Save your Java code

2.   Compile and run your Java program.

3.   Verify there is no syntax, logical or run-time errors.

4.   Use the following set of test data to determine if the application is calculating properly:

Day          Sales Amount         

1                      1500                                       

2                      2500                                       

3                      1000                               

4                      3000

5                      1550

6                      3500

7                      2550               

Total Weekly Sales Amount: $15,600.00


F. Submit your exercise in the Canvas Lab Exercise #11 Drop Box.

1. Submit the screen shot of the Eclipse Workbench window showing the Console output screen.
You can use Paint (save as JPG) or Word to paste the screenshot.

2. Zip up and submit the compressed SalesAmount subfolder that is in the Exercise-11 folder.
NOTE: Right click on the
subfolder and select Send to “Compress Folder”.  The file will have a file extension of .zip.