How to determine day of week by passing specific date?

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Yes. Depending on your exact case:

  • You can use java.util.Calendar: Calendar c = Calendar.getInstance(); c.setTime(yourDate); int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);
  • if you need the output to be Tue rather than 3 (Days of week are indexed starting at 1 for Sunday, see Calendar.SUNDAY), instead of going through a calendar, just reformat the string: new SimpleDateFormat("EE").format(date) (EE meaning “day of week, short version”)
  • if you have your input as string, rather than Date, you should use SimpleDateFormat to parse it: new SimpleDateFormat("dd/M/yyyy").parse(dateString)
  • you can use joda-time’s DateTime and call dateTime.dayOfWeek() and/or DateTimeFormat.
  • edit: since Java 8 you can now use java.time package instead of joda-time

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