A09 - Lists for Shapes

Lists are better than arrays. Therefor we want to switch all arrays to lists.¹

Step 1

We want to change all appearance of arrays in the Polygon class to List<Point2D>:

• change the typ of the property and field “Vertices”
• change the get of “VertexCount”
• change the constructor
  • we didn’t need the parameter for the vertex count anymore but we need to initialize a empty list instead
• also change the methods