// Quiz Java Program
// Travis Whitton

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

public class Quiz extends Applet implements ActionListener
{
    Label prompt;     //Prompt User
    TextField input;  //Input values entered here
    Float area, radius, diameter, circumference, pi;
    String text;

    public void init()
    {
        prompt = new Label("Enter a float");
        add(prompt);
        input = new TextField(10);
        add(input);
        input.addActionListener(this);
    }

    public void paint(Graphics g) {           
            g.drawString("Radius = " + radius, 65, 45);
            g.drawString("Diameter = " + diameter, 65, 60);
            g.drawString("Circumference = " + circumference, 65, 75);
            g.drawString("Area = " + area, 65, 90);
    }

    public void actionPerformed(ActionEvent e)
    {
        text = e.getActionCommand();
        radius = Float.valueOf(e.getActionCommand());
        diameter = Float.valueOf(Float.toString(radius.floatValue() * 2));
        pi = Float.valueOf("3.14");
        circumference = Float.valueOf(Float.toString((radius.floatValue() * 2 * pi.floatValue())));
        area = Float.valueOf(Float.toString((pi.floatValue() * (radius.floatValue() * radius.floatValue()))));
        repaint();        
    } 
}