===========================================================================================================================
Circle.java
===========================================================================================================================
package edu.ilstu;

import java.util.Scanner;

/*
 *<insert description>
 *
 * @author Derek
 *
 */

public class Circle
{
	Scanner scan = new Scanner(System.in);
	 private double radius=scan.nextDouble();
	 private final double PI= 3.14159;
	 double area=PI*radius*radius,
			diameter=radius*2,
			circumference=2*PI*radius;

	public double calculateArea(){
		return area;
	}
	public double calculateDiameter(){
		return diameter;
	}
	public double calculateCircumference(){
		return circumference;
	}
	public void setRadius(double radius) {
		this.radius=radius;
	}
	public double getRadius(){
		return radius;
	}

}

===========================================================================================================================
CircleDriver.java
===========================================================================================================================
package edu.ilstu;
import java.util.Scanner;


/*
 *<insert description>
 *
 * @author Derek
 *
 */

public class CircleDriver
{
	Scanner scan = new Scanner(System.in);

	public static void main(String[]args) {

	System.out.print("Enter the radius of a circle:  ");
	Circle circleOne = new Circle();
	circleOne.getRadius();
	circleOne.calculateArea();
	circleOne.calculateDiameter();
	circleOne.calculateCircumference();
	System.out.println("Area =  "+circleOne.calculateArea());
	System.out.println("Area =  "+circleOne.calculateDiameter());
	System.out.println("Area =  "+circleOne.calculateCircumference());
	}
}