84. Calculating the middle of the month

Let’s imagine that we have a LocalDate and we want to calculate from it another LocalDate representing the middle of the month. This can be achieved in seconds if we know that the LocalDate API has a method named lengthOfMonth(), which returns an integer representing the length of the month in days. So, all we have to do is calculate lengthOfMonth()/2 as in the following code:

public static LocalDate middleOfTheMonth(LocalDate date) {
  return LocalDate.of(date.getYear(), date.getMonth(), 
    date.lengthOfMonth() / 2); 
}

In the bundled code, you can see a solution based on the Calendar API.