Your Assignment

1. I will provide you folder Project1, which contains an applet, HeartRate.java. You will find it on the "I: drive", available in the Towers computer lab. Use Windows Explorer to follow the I: drive, then COMP, then 1600, then 20142-COMP-1600-01 then Common. Copy folder Project1 into your Z: drive workspace, preferably into a folder you've created for your COMP 1600 work.
2. In jGRASP, open HeartRate.java. Compile and run it to make sure it works. You will modify this class to build your solution.
3. What your program will do (short version):Request the user's name, age, and resting heart rate. Calculate training zone minimum and maximum heart rates based on the formulas given below, then produce a color 5-segment horizontal bar chart to represent ideal heart rates to maintain over a 50 minute workout. This can all be done by modifying the class provided.
4. Submit the resulting HeartRate.java program.

The Calculations

The effectiveness of an aerobic training program can be measured by heart rate during training using the Karvonen formula. According to the Karvonen formula, a person's aerobic workout should be designed to maintain a heart rate within a Training Zone.

• The person's Age is input by the user
• The person's Resting Heart Rate is input by the user
• The Maximum Heart Rate is calculated by:  220 - Age
• The Heart Rate Reserve is calculated by:   Maximum Heart Rate - Resting Heart Rate
• The Training Zone low end is calculated by:   (Heart Rate Reserve * 0.50) + Resting Heart Rate
• The Training Zone high end is calculated by:   (Heart Rate Reserve * 0.85) + Resting Heart Rate

Example: a 48 year old person with a Resting Heart Rate of 60 BPM (beats per minute).
Maximum Heart Rate = 220 - 48 = 172
Heart Rate Reserve = 172 - 60 = 112
Training Zone low end = (112 * 0.50) + 60 = 116
Training Zone high end = (112 * 0.85) + 60 = 155

Everything is rounded to the nearest whole number. Hint: use Math.round()

What Your Program Will Do (Details)

Phase 1: get the input

1. Input will be performed within the void init() method. This method is called automatically when your applet is run.
2. Use JOptionPane to get the user's name, age and resting heart rate. The dialog box will be centered on the screen. The first one is done for you.
3. Store these in the String variables provided.
4. For use in calculations, the age and resting heart rate need to be in integer variables. You can get an int from a String by using the Integer.parseInt() method. Give it the string variable as an argument and it will return the corresponding int value. You will assign the return value to the provided int variable.
5. Also, be sure to put your name in the program, as a comment at the top of the file.

Phase 2: perform the calculations

1. The heart rate calculations can be performed inside the paint() method.
2. Use the integer age and resting heart rate to calculate the various heart rates described in the Karvonen formulas. For debugging purposes, I suggest you output the results using System.out.println(), so you can view them in jGRASP's output window at the bottom of the screen. If you do this, be sure to remove or comment it out before submitting the program.
3. Determine the target heart rates for a 50 minute workout, in five 10-minute segments. The target heart rate for the first segment should be at the lower end of the training zone. The second segment should be at the midpoint between the lower and upper ends of the training zone. The third segment should be at the upper end of the training zone. The fourth segment should be the same as the second and the fifth the same as the first.

Phase 3: draw the results

1. Graph the results on the Graphics object page you are already given in the paint() method. Graph the 50 minute workout as a horizontal bar chart (left edge is the base). Each 10-minute segment will be a rectangle, and the target heart rate determines the width of the rectangle. The five rectangles will be of equal height (you choose the height; each represents 10 minutes) and will be adjacent to each other with time going from top to bottom. The color of the rectangle will be determined by the target heart rate level. Since there are 3 different levels (low end, midpoint, high end), use three different colors of your choice. Each segment should be labeled with the target heart rate it represents - you can put the label to the left of or inside the rectangle.
2. Beneath the chart, put the label "Workout chart for name age age". Output the age as input by the user (the String variable).

Example Result

Here's an example chart for Erin, age 23 with resting heartrate of 68 bpm.

Point Allocations

To Turn In

When you are finished, place HeartRate.java into your individual DropBox folder. This is on the I: drive. Browse to I:\COMP\1600\20142-COMP-1600-01\DropBox then drop the file into the folder with your name.