*JAVA*

I was wondering if I can get some help implementing this image into code. Thank you so much in advance!

Write the Polygon interface and two classes (Triangle and Rectangle).

You can reuse Point in Java API or define your own.

Implement getPoints() and getArea() in the two subclasses.

Use Herons formula to compute a triangles area.

The area of a triangle = Sqrt(s(s-a)(s-b)(s-c))

where s = (a + b + c) / 2

a, b and c are the lengths of the triangles sides.

Polygon > AreaCalculator - points: ArrayList areaCaloc 0..1 + Polygon( points: ArrayList, areaCalc: AreaCalce ator) + getArea(points: ...): float + setAreaCalc( calc: AreaCalculator); + addPoint( point: Point); + getArea): float TriangleAreaCalc return is.points points; RectangleAreaCalc areaCalc.getArea(points); this.areaCalc=areaCalc; Userlclient of Polygon: ArrayListPoint al = new ArrayList(); al.add( new Point(...) ); al.add( new Point(...) ); al.add( new Point(...) ); Polygon pnew Polygon( al, new TriangleAreaCalc)); p.getArea); // triangle's area p.addPoint( new Point(...) ); p.setAreaCalc(new RectangleAreaCalc); p.getArea); // rectangle's area Polygon > AreaCalculator - points: ArrayList areaCaloc 0..1 + Polygon( points: ArrayList, areaCalc: AreaCalce ator) + getArea(points: ...): float + setAreaCalc( calc: AreaCalculator); + addPoint( point: Point); + getArea): float TriangleAreaCalc return is.points points; RectangleAreaCalc areaCalc.getArea(points); this.areaCalc=areaCalc; Userlclient of Polygon: ArrayListPoint al = new ArrayList(); al.add( new Point(...) ); al.add( new Point(...) ); al.add( new Point(...) ); Polygon pnew Polygon( al, new TriangleAreaCalc)); p.getArea); // triangle's area p.addPoint( new Point(...) ); p.setAreaCalc(new RectangleAreaCalc); p.getArea); // rectangle's area