sortable-shapes

Sortable Shapes

Although shapes can be very different by nature, they can be sorted by the size of their area.

Task:

Create different shapes that can be part of a sortable list. The sort order is based on the size of their respective areas:

• The area of a Square is the square of its side
• The area of a Rectangle is width multiplied by height
• The area of a Triangle is base multiplied by height divided by 2
• The area of a Circle is the square of its radius multiplied by π
• The area of a CustomShape is given

The default sort order of a list of shapes is ascending on area size:

double side = 1.1234;
double radius = 1.1234;
double base = 5;
double height = 2;

ArrayList<Shape> shapes = new ArrayList<Shape>();
shapes.add(new Square(side));
shapes.add(new Circle(radius));
shapes.add(new Triangle(base, height));

Collections.sort(shapes);

Use the correct π constant for your circle area calculations:

Math.PI