RunCircle, 26.06.2021

public class RunCircle {

    public static void main(String[] args) {
        Circle c1;
        Circle c2;

        // new circle with radius 1.0
        c1 = new Circle();

        // new Circle with radius 7.0
        c2 = new Circle(7);
        // print radius of each circle
        System.out.println(c1.getRadius());
        System.out.println(c2.getRadius());

        // print c1 area
        System.out.println(c1.getArea());

        // print c2 area
        System.out.println(c2.getArea());

        // set radius to 5 for both circles
        // c1.setRadius(5);
        c2.setRadius(5);
        // print radius of each circle
        System.out.println(c1.getRadius());
        System.out.println(c2.getRadius());

        // c1 and c2 are different objects
        if (c1 == c2) {
            System.out.println("Equal");
        } else {
            System.out.println("Not Equal");
        }

        Circle c3 = c1;

        // c1 and c3 points to the same object
        if (c1 == c3) {
            System.out.println("Equal");
        } else {
            System.out.println("Not Equal");
        }

        // print circle data
        System.out.println(c1);
        System.out.println(c2);
        System.out.println(c3);

    }

}