CS 111: Lab 6 main content

Student Learning Objectives

Demonstrate the ability to

Use the jGRASP programming environment to create a new Java project at u:\Lab6\ with two Java code files: SalesTax.java and Driver.java.
Use AWT and Swing components to create a GUI application
Create SaleTax class derived from JFrame
Use a JOptionPane to show a message dialog with output results

Lab 6 Assignment

Do Chapter 11, Programming Challenge 2: Monthly Sales Tax

A retail company must file a monthly sales tax report listing the total sales for the month, and the amount of state and county sales tax collected. The state sales tax rate is 4% and the county sales tax rate is 2%. Create a GUI application that allows the user to enter the total sales for the month into a text field. From this figure, the application should calculate and display the following:

The amount of county sales tax
The amount of state sales tax
The total sales tax (county plus state)

Use named constants to represent the county tax rate (0.02) and the state tax rate (0.04)

Sample Session

lab6 JFrame lab6 message dialog

To Receive Credit

If you finish during Tuesday's lab, ask your TA to come over to check your program and give you credit.
Note: The TA will check your program on your computer. You do not need to print out the source code.
If you are unable during Tuesday's lab, turn in the printout of SalesTax.java by the start of class on Wednesday.