Rectangle class

public class Rectangle extends Shape {
	//have to create objects
	Point a = new Point();
	Point b = new Point();
	Point c = new Point();
	Point d = new Point();
	Point Center = new Point();

	public Rectangle() {
		// TODO Auto-generated constructor stub
	}

	public Rectangle(double x, double y) {
		//super(x, y);
		// TODO Auto-generated constructor stub
	}

	public Rectangle(Point a1, Point b1, Point c1, Point d1){

		a.setX( a1.getX() );
		a.setY( a1.getY() );

		b.setX( b1.getX() );
		b.setY( b1.getY() );

		c.setX( c1.getX() );
		c.setY( c1.getY() );

		d.setX( d1.getX() );
		d.setY( d1.getY() );

		/*
		angThree.setX( three.getX() );
		angThree.setY( three.getY() );

		angFour.setX( four.getX() );
		angFour.setY( four.getY() );

		*/
		Center.setX( ( ( a.getX() + b.getX() + c.getX() + d.getX() ) / 4 ) );
		Center.setY( ( ( a.getY() + b.getY() + c.getY() + d.getY() ) / 4 ) );

	}


	@Override
	double calculateArea() {
		// TODO Auto-generated method stub
		return 0;
	}

	@Override
	public String toString() {
		String output = "\nThe Co-ordinates of this Rectangle are: \n";
		output += "\tA = " + "( " + a.getX() + ", " + a.getY() + " )";
		output += "\tB = " + "( " + b.getX() + ", " + b.getY() + " )";
		output += "\tC = " + "( " + c.getX() + ", " + c.getY() + " )";
		output += "\tD = " + "( " + d.getX() + ", " + d.getY() + " )";
		return output;
	}

}