CLASS AS CIRCLE

 

class Circle 

{

    public double radius;

    

    public double area()

    {

        return Math.PI*radius*radius;

    }

    public double perimeter()

    {

        return 2*Math.PI*radius;

    }

    public double circumference()

    {

        return perimeter();

    }

            

    

    public static void main(String[] args) {

     Circle c1=new Circle();

     c1.radius=7;

     System.out.println("Area:"+c1.area());

     System.out.println("Perimeter:"+c1.perimeter());

     System.out.println("Circumference:"+c1.circumference());

    }

    

}