How can I use a class in an application

Question

here are my instructions, my professor confuses me like crazy, so I'm thinking this is a basic question:
Input Requirements
Ask the user to enter the value of the radius. You may assume that the user will enter a positive value for the radius. Your program should display the instructions for using the program and a prompt for the radius as illustrated in the sample run shown above.
Miscellaneous Requirements
Using Windows Explorer, copy your Circle.java file from your Lab04 project folder into your Hmwk04 project folder. This makes the Circle class available to your application. Your application should use a Circle object to store the radius entered by the user. Your application should get the specified output values (radius, diameter, circumference, and area) from this Circle object.
I have the Circle.java thing in my folder, (we use blue j) so it is useable, but I really do not know what to do. The Circle object has the information about the area and stuff
ex)
public double getDiameter ()
return 2.0* radius ;
public double getCircumference ()
return 2.0*Math.PI*radius;
etc and stuff, but I really do not know how to bring that thing over to use it,
this is what I have so far and this is right, I just do not know where to go from here.
public static void main(String[] args) throws Exception
double radius;
Circle myCircle = new Circle();
Scanner dl = new Scanner(System.in);
System.out.println("Given the radius of a circle, this program");
System.out.println("finds the diameter, the circumference and the area");
System.out.println(" ");
System.out.println(" ");
System.out.println("Please enter the Radius: ");
radius = dl.nextDouble();so any help would be great
Edited by: border9 on Feb 11, 2009 9:00 AM

Answer 1

Pay more attention in class?