/*
 * This program will will compute the area of a circle, given the radius
 * entered by the user.
 *
 *  area          = PI * r ^ 2
 *
 *
 * Where r is the radius.
 *
 * Output will be rounded to three places.
 */

 import javax.swing.JOptionPane;

 class CircleArea{
	 public static void main(String [] args){
		 final double PI = 3.14159;

		 String inputForRadius = JOptionPane.showInputDialog("Enter Radius");
		 double radius = Double.parseDouble(inputForRadius);

		 double area = PI * radius * radius;
		 double circumference = 2.0 * PI * radius;


		 System.out.println("The area of a circle with radius " + radius + " is " + area);

		 System.exit(0);
	 }
 }