Pie Chart Applet (Version#2)

File: PieChart.java Purpose: Given the number of students in class that will major in each discipline, depict the data as a pie chart. Notes: Version 2 The applet is a second version of a Java program that performs some simple computations uses the paint method to display the data visually. In this version, we have created methods to separate out various tasks. We took the Version 1 and modified it into this version. NOTE: In the process of modifying from version 1, we have inadvertently introduced an error in the program! Can you tell what it is? HINT: Scroll down this page until the applet above is no longer visible. Then scroll back up again. Do you see the problem? Do you know how to correct the situation? Send me an e-mail with your correction. If your solution is correct, you will get 1 Home Work equivalent of EXTRA CREDIT! [All answers should be due by Tue 2/12 2:00 pm] */ import java.awt.*; import java.applet.Applet; public class PieChart extends Applet { // variables to store the number of students in each discipline int Sci, Soc, Hum; // variables to store percentages should be float float PercSci, PercSoc, PercHum; // the coordinates and size of the pie is fixed below int x = 50, y = 50, w = 100, h = 100; // these quantities will need to be computed for each slice int startAngle = 0, degrees; public void init() { // Set # of students in each discipline Sci = 5; Soc = 6; Hum = 7; compute(); } // end of init private float perc(int x, int t) { // computes the percentage of x over t return x * 100.0f/t; } // end of perc public void compute() { // does the required computations // the total number of students int Total; // Computer percentages Total = Sci + Soc + Hum; PercSci = perc(Sci, Total); PercSoc = perc(Soc, Total); PercHum = perc(Hum, Total); //PercSci = Sci * 100.0f / Total; //PercSoc = Soc * 100.0f / Total; //PercHum = Hum * 100.0f / Total; // Print out results for checking System.out.println("Total = " + Total); System.out.println("%Sci = " + PercSci); System.out.println("%Soc = " + PercSoc); System.out.println("%Hum = " + PercHum); } // end of compute public void paint(Graphics g) { // Display the Pie Chart // Display the Pie for Sciences degrees = (int) (PercSci*360/100); g.setColor(Color.red); g.fillArc(x, y, w, h, startAngle, degrees); // Pie for Soc startAngle = degrees; degrees = (int) (PercSoc*360/100); g.setColor(Color.yellow); g.fillArc(x, y, w, h, startAngle, degrees); // Pie for Hum startAngle = startAngle + degrees; degrees = (int) (PercHum*360/100); g.setColor(Color.green); g.fillArc(x, y, w, h, startAngle, degrees); } // end of paint } // end of applet