/*
   Chapter 3:  Chapter Walk Through part2 (The Body Mass Index       Calculator)
  Programmer: Brad Shedd
   Date:       April 19, 2006
   Filename:   BodyMassApplet.java
   Purpose: This project calculates the body mass index based
            on a person's height and weight.
*/

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class BodyMassApplet extends Applet implements ActionListener
{
   // delare variables
   Image logo;    // declare an Image object
   int inches, pounds;
   double meters, kilograms, index;

  //constuct components
   Label companyLabel = new Label("THE SUN FITNESS CENTER BODY MASS INDEX CALCULATOR");
   Label heightLabel = new Label("Enter your height to the nearest inch: ");
      TextField heightField = new TextField(10);
   Label weightLabel = new Label("Enter your weight to the nearest pound: ");
      TextField weightField = new TextField(10);
   Button calcButton = new Button("Calculate");
      getRootPane().setDefaultButton(calcButton);
   Label outputLabel = new Label("Click the Calculate button to see your body mass index.");

      public void init()
      {
         setForeground(Color.red);
         add(companyLabel);
         add(heightLabel);
         add(heightField);
         add(weightLabel);
         add(weightField);
         add(calcButton);
         calcButton.addActionListener(this);
         add(outputLabel);
         logo = getImage(getDocumentBase(), "logo.gif");
      } // end of init method

      public void actionPerformed(ActionEvent e)
      {

         inches = Integer.parseInt(heightField.getText());
         pounds = Integer.parseInt(weightField.getText());
         meters = inches / 39.36;
         kilograms = pounds / 2.2;
         index = kilograms / Math.pow(meters,2);
         outputLabel.setText("YOUR BODY MASS INDEX IS " + Math.round(index) + ".");
     }

      public void paint(Graphics g)
      {
         g.drawImage(logo,125,160,this);
      }
} // end of BodyMassApplet class

Homepage