import java.awt.*;
import javax.swing.*;
import java.text.DecimalFormat;
 
public class Statistics {
public static void main ( String args[] )
{
int classTotal, mark; //hold user entered numbers
int extremeobese = 0, veryobese = 0,
obese = 0, overweight = 0,
healthy = 0, underweight = 0;
 
 
// for the count of each category
    int count=0, largest=0, smallest=100, total=0;
//displaying results
    double average = 0.0; //float to display correct average
    double bmi = 0.0;
    double height;
    double extremeobesePC = 0.0,
    veryobesePC = 0.0,
    obesePC = 0.0,
    overweightPC = 0.0,
    healthyPC = 0.0,
    underweightPC = 0.0, BMIlarge=0.0, BMIsmall=100.0;
//displaying averages
 
 
    String inputString;
//get total in class number
    inputString = JOptionPane.showInputDialog("Enter the Number of Dieters in the Class (0 - 25): " );
    classTotal = Integer.parseInt ( inputString );
//validate this number
 
    
    while (classTotal < 0 || classTotal > 25) {
    JOptionPane.showMessageDialog(null, "Must be between 0 and 25",
    "Input Error", JOptionPane.ERROR_MESSAGE );
    inputString = JOptionPane.showInputDialog("Incorrect Entry - Please Re-Enter: ");
    classTotal = Integer.parseInt (inputString);
}
    if (classTotal == 0)
{
    JOptionPane.showMessageDialog(null, "The Program Is Closing Down",
    "Exit Messeage", 
    JOptionPane.INFORMATION_MESSAGE );
}
    else
{
//get marks
    for (int i = 1; i <= classTotal; i++)
{
    inputString = JOptionPane.showInputDialog(null,
    "Dieter Number" + i + " Enter Weight (0 - 200)kg: ");
    mark = Integer.parseInt (inputString);
//validate this number
    while (mark < 0 || mark > 200) {
    JOptionPane.showMessageDialog(null, 
    "Must Be Between 0 and 200",
    "Input Error", 
    JOptionPane.ERROR_MESSAGE);
 
    JOptionPane.showMessageDialog(null,
    "Incorrect Entry - Please Re-Enter: " );
    mark = Integer.parseInt (inputString);
}//end while
    total += mark; // running total to calculate average
    if (mark > largest) // check for largest number
    largest = mark;
 
    if (mark < smallest) // check for smallest number
    smallest = mark;
 
    inputString = JOptionPane.showInputDialog(
    "Dieter Number" + i + " Enter Height (0 - 2.50)m: ");
    height = Double.parseDouble (inputString);
//validate this number
    while (height < 0 || height > 2.50) {
    JOptionPane.showMessageDialog(null, 
    "Must Be Between 0 and 2.50m",
    "Input Error", 
    JOptionPane.ERROR_MESSAGE);
 
    JOptionPane.showMessageDialog(null,
    "Incorrect Entry - Please Re-Enter: " );
    height = Integer.parseInt (inputString);
}//end while
 
 
bmi = mark/(height*height);
//calculate category and increment category total
    
    if (bmi >= 40){
    extremeobese++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are Extremely Obese");
    }
    else
    if (bmi >= 35 || bmi <= 39.9) {
    veryobese++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are Very Obese");
    }
    else
    if (bmi >= 30 || bmi <= 34.9){
    obese++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are Obese");
    }
    else
    if (bmi >= 25 || bmi <= 29.9){
    overweight++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are Over Weight");
    }
    else
    if (bmi >= 18.5 || bmi <= 24.9){
    healthy++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are Healthy");
    }
    else
    {
    underweight++;
    JOptionPane.showMessageDialog(null, "Your bmi is" + bmi + "You Are under Weight");
    }
} //end for
    DecimalFormat twoPlaces = new DecimalFormat ("0.00");
//format float to 2 decimal places
 
 if (bmi > BMIlarge) // check for largest number
    BMIlarge = bmi;
 
    if (bmi < BMIsmall) // check for smallest number
    BMIsmall = bmi;
    average = (double) total / classTotal;
//ensure correct average using
//cast to float
//calculate percentages
    extremeobesePC = ((double) extremeobese *100)/classTotal;
    veryobesePC = ((double) veryobese *100)/classTotal;
    obesePC = ((double) obese *100)/classTotal;
    overweightPC = ((double) overweight *100)/classTotal;
    healthyPC =((double) healthy *100)/classTotal;
    underweightPC = ((double) underweight *100)/classTotal;
 
 
 
    JTextArea outputArea = new JTextArea ( 6, 40 ); //results display
    String output = "Extremely Obese            Number: " + extremeobese + 
    "                   Percentage " + twoPlaces.format(extremeobesePC) + "\n";
    output += "Very Obese                       Number: " + veryobese + 
    "       Percentage " + twoPlaces.format(veryobesePC) + "\n";
    output += "Obese                            Number: " + obese + 
    "                   Precentage " + twoPlaces.format (obesePC) + "\n";
    output += "Over Weight                      Number: " + overweight + "                  Percentage " + 
    twoPlaces.format (overweightPC) + "\n";
    output += "Healthy                          Number: " + healthy + 
    "                   Percentage " + twoPlaces.format (healthyPC) + "\n";
    output += "Under Weight                     Number: " + underweight + 
    "                   Percentage " + twoPlaces.format (underweightPC) + "\n\n\n\n";
 
    output += "Highest Weight: " + largest + "\n";
    output += "Lowest Weight: " + smallest + "\n";
    output += "Average Weight: " + twoPlaces.format (average) + "\n\n\n";
 
    output += "Highest bmi: " + twoPlaces.format (BMIlarge) + "\n";
    output += "Lowest bmi: " + twoPlaces.format (BMIsmall) + "\n";
 
    outputArea.setText ( output );
//title
    JOptionPane.showMessageDialog(null, outputArea, 
    "Student Marks - Ernie Douglus",
    JOptionPane.INFORMATION_MESSAGE );
}
    System.exit( 0 );
}
}