Mine

public class Octagon extends GeometricObject 
	implements Cloneable, Comparable {

	public double side;
	
	Octagon() {
		side = 1;
	}
	
	Octagon(double inSide) {
		side = inSide;
	}
	
	public double getArea() {
		return  (2+4/Math.sqrt(2))*side*side ;
	}

	public double getPerimeter() {
		return 8 * side;
	}

	public int compareTo(Object o) {
		if (getArea() > ((Octagon)o).getArea()) 
			return 1;
		if (getArea() < ((Octagon)o).getArea())
			return -1;
		else 
			return 0;
	}
	
		public Object clone() {
			try {
				return super.clone();
			}
			catch (CloneNotSupportedException ex) {
				return null;
			}
		}
}