//Circle Implementation
//by www.neiljohan.com

public class Circle implements Figure
{
    double Radius = 0;
    
    public Circle()
        {}

    public Circle(final double tRadius)
        {
            Radius = tRadius;
        }
    
    public double area()
        {
            return Math.PI*(Radius*Radius);
        }
    
    public double perimeter()
        {
            return 2*Math.PI*Radius;
        }
    
    public String toString()
        {
            return "Circle(" + Radius + ")";
        }
}