The method public LatLon getCircularRegionApproximation(int numberOfPoints) throws an ArrayIndexOutOfBoundsException under certain conditions. This is because of an error in the following loop:
The exception arises because integer i is used as the array index for the points array, but the value of i jumps up by (360/numberOfPoints) on every iteration of the loop. For example, if numberOfPoints is 10, then i will increase by 36 each time, resulting in the exception. The points array size is set before the loop to 'numberOfPoints + 1'.
As an experiment, I changed the loop as shown below and this appeared to fix the problem. There may be a more elegant solution: