Check if DAY_OF_WEEK is between Monday and Friday

android, calendar, dayofweek, error-handling, java

Solution

Wow, that's like trying to kill a mosquito with a thermo-nuclear warhead :-)

Java guarantees (in 1.5) (unchanged up to 1.8 at least) that the values of `SUNDAY` through `SATURDAY` are contiguous (1 through 7) so it's a simple matter of checking a range.

However, `DAY_OF_WEEK` is not the day of the week, it's a field number (with the value 7) to be passed to the getter to retrieve the day of the week. The only time `Calendar.DAY_OF_WEEK` itself will match an actual day will be on Saturdays.

You can use code such as:

Calendar myDate = Calendar.getInstance(); // set this up however you need it.
int dow = myDate.get (Calendar.DAY_OF_WEEK);
boolean isWeekday = ((dow >= Calendar.MONDAY) && (dow <= Calendar.FRIDAY));

Following this, `isWeekday` will be true if and only if the day from `myDate` was Monday through Friday inclusive.

Problem

I'm trying to create a method which is checking if "today" is between Monday and Friday. For this I get with this line `'int day = Calendar.DAY_OF_WEEK;'` the actual day. After that I fill a ArrayList with the days (Monday, Tuesday, Wendsday, Thursday and Friday). Now when I check if the actual day is in my ArrayList, i set `boolean DAY = true` else i set `boolean DAY = false`. I tryed the Method today and yesterday, but it allways sets the boolean to false. What do I need to change that my code works? You'll find the code down here. Code ``` int day = Calendar.DAY_OF_WEEK; ArrayList<Integer> daylist = new ArrayList<Integer>(); daylist.add(Calendar.MONDAY); daylist.add(Calendar.TUESDAY); daylist.add(Calendar.WEDNESDAY); daylist.add(Calendar.THURSDAY); daylist.add(Calendar.FRIDAY); if (daylist.contains(day)){ DAY = true; }else{ DAY = false; } ```

Original source