Get the weeknumber from a given date in Java FX

Question

I have a javafx.scene.control.DatePicker. I want to extract the (Locale) week number from the selected date. Until now i haven\'t found a solution and i prefer not to write

Answer 1

You can use http://docs.oracle.com/javase/8/docs/api/java/time/LocalDate.html#get-java.time.temporal.TemporalField-

LocalDate localDate = LocalDate.of(2014, 9, 18); // assuming we picked 18 September 2014
int weekNumber = localDate.get(IsoFields.WEEK_OF_WEEK_BASED_YEAR);

This will give you the week number based on ISO convention.

For a locale based evaluation :

LocalDate localDate = LocalDate.of(2014, 9, 18); // assuming we picked 18 September 2014
WeekFields weekFields = WeekFields.of(Locale.US);
int weekNumber = localDate.get(weekFields.weekOfWeekBasedYear());