Passing arguments and returning values.

Passing arguments and returning values.

class circle

{

        private int radius;

        public void setradius(int r)

        {

                radius = r;

        }

        public float calculate()

        {

                return 3.14f * radius * radius;

        }

        public static void main(String args[])

        {

                if (args.length < 1)

                {

                        System.out.println("Invalid Arguments");

                        System.exit(0);

                }

                circle c = new circle();

                c.setradius(Integer.parseInt(args[0]));

                float area = c.calculate();

                System.out.println("Radius : " + args[0]);

                System.out.println("Area : " + area);

        }

}

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