how to change an element in an array that is defined as a method?-CodePudding

private static int[] daysInMonth = {31 , 28 , 31 , 30 , 31 , 30 , 31 , 31 , 30 , 31 , 30 , 31};

I'm looking for a way to make it that if the year % 4 == 0 then daysInMonth[1] = 29

CodePudding user response：

While the question is not very clear, I'll attempt an answer.

What you seem to be asking is that when you access daysInMonth[1], you need it to be dynamic based on the year you are working with.

If you wish to use daysInMonth[1], then it's not possible without using lamdas or method references as the array instead of integer.

What I would instead recommend is that you access the values via an accessor method, something like this:

public int daysOfMonth(int year, int month) {
  if (month == 1 && year % 4 == 0) {
    return 29;
  }
  return daysInMonth[1];
}

CodePudding user response：

You can check if it's a leap year. If it is, the Feb has 29 days.

 private static int[] daysInMonth = {31 , LocalDate.now().isLeapYear() ? 29:28 ,
                                    31 , 30 , 31 , 30 , 31 , 31 , 30 , 31 , 30 , 31};