/*
 * Course: SE-1010
 * Section: 2
 * Term: Fall 2006
 * Author: Dr. Wu
 * Assignment: Lab 0
 * Date: 09/15/2006
 */
package lab0;

import javax.swing.*;
import java.text.*;

/**
 * This class contains one method that prompts the user for the
 * radius of a circle.  It calculates the area and circumference
 * for a circle with the entered radius and displays the answer
 * to the console.
 *
 * @version 1.0 09/15/2006
 * @author Dr. Wu
 */
public class Ch2Circle3 {

    /**
     * The main method that implements the functionality for the
     * Ch2Circle3 class.
     *
     * @author Dr. Wu
     * @param args Ignored
     */
    public static void main(String[] args) {
        
        final double PI = 3.14159;
        
        // Identifier creation
        String radiusStr;
        double radius;
        double area;
        double circ;
        java.text.DecimalFormat df 

        // Object creation
        df = new java.text.DecimalFormat("0.000");
        
        // Popup a window prompting the user to enter the radius
        radiusStr = JOptionPane.showInputDialog(null, "Enter radius:");

        // Converts the value of the radius from the String
        //  representation (raduisStr) to a double (radius).
        radius = Double.parseDouble(radiusStr);
        
        area = PI * radius * radius;
        circ = 2.0 * PI * radius;
        
        // Display results in the console window
        System.out.println("");
        System.out.println("Given radius: " + radius);
        System.out.println("Area: " + df.format(area));
        System.out.println("Circumference: " + df.format(circ));;
    }

}