RoundingMode.HALF_EVEN always rounds to the next number, like any other rounding-algorithmn - with only one execption: If the number-to-round is exacly between 2 numbers (2.5, 42.5, -4.5), it will not round it up, but instead round it to the neighbour which is even. Here are some examples:
- 3.2 -> 3
- 3.4 -> 3
- 3.5 -> 4
- 4.5 -> 4
- 5.5 -> 6
- -7.5 -> -8
