interface Square{
double square();
}
interface Perimeter{
double perimeter();
}
public class Overload {
public static void main(String[] args) {
Square s=new Circle(5);
}
}
class Circle implements Square, Perimeter{
double r;
Circle(double r){
this.r=r;
}
public double perimeter() {
return 2*Math.PI*r;
}
public double square() {
return Math.PI*r*r;
}
}