Circle class

public class Circle extends Shape {

	private int radius;

	public Circle() {
		super(0,0);
		this.radius = 0;
	}

	public Circle(int x, int y, int r) {
		super(x, y);
		this.radius = r;
		// TODO Auto-generated constructor stub
	}

	@Override
	double calculateArea() {

		return Math.PI * radius * radius;
	}

	@Override
	public String toString() {
		String output = "\nThis circle has: ";
		output += "\n\tCenter at: " + this.Center;
		output += "\n\tRadius: " + this.radius;
		return output;
	}

}