CodingForums.com - Need help passing variable to another class

I'm trying to call the variable r from another class, but I'm having trouble making it.

Code:

public class Circle {

    

    final double PI = 3.14159;

    CircleTester temp = new CircleTester();

    double radius = temp.gettemprad();  //this is where i was gonna call a method but I was having trouble making one in my other class

    

    Circle(double newradius){

        newradius = radius;

    }

    Circle(){

        radius = 0.0;

    }

    void setRadius(double inputradius){

        radius = inputradius;

    }

    double getRadius(){

        return radius;

    }

    

    double getArea(){

       return PI * radius * radius;

    }

    

   double getDiameter(){

       return radius * 2;

    }

   double getCircumference(){

       return 2 * PI * radius;

   }

}

Code:

import java.util.Scanner;

public class CircleTester {

    public static void main(String [] args){

       double r;

       Circle c = new Circle();

        Scanner scan = new Scanner(System.in);

        

        System.out.println("What is the radius of the circle");

        

        r = scan.nextDouble();

        

        //after I got r to the other class i was going to call the methods below

                

        System.out.println("The circle's area is "+c.getArea());

        

        System.out.println("The circle's diameter is "+c.getDiameter());

        

        System.out.println("The circumference is "+c.getCircumference());

    

    }

    

}

Basically I want the user input (r) to go to the other class so I can get different measurements from it and then return those values back to the original class using System.out.print. Thanks.