Java Calendar set week date

import java.text.DateFormat;
import java.util.Calendar;
import java.util.SimpleTimeZone;

public class Main {

   public static void main(String[] args) {
      Calendar calendar = Calendar.getInstance();

      if (calendar.isWeekDateSupported()) {
         System.out.println("Number of weeks in this year: " + calendar.getWeeksInWeekYear());
         System.out.println("Current week number: " + calendar.get(Calendar.WEEK_OF_YEAR));
      }//from   ww w . ja  v a 2  s  .co m

      calendar.setWeekDate(2012, 16, 3);
      System.out.println(DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG).format(calendar.getTime()));

      calendar.setWeekDate(2022, 1, 1);
      System.out.println(DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG).format(calendar.getTime()));

      SimpleTimeZone simpleTimeZone = new SimpleTimeZone(-21600000, "CST", Calendar.MARCH, 1, -Calendar.SUNDAY, 7200000,
            Calendar.NOVEMBER, -1, Calendar.SUNDAY, 7200000, 3600000);
      System.out.println(simpleTimeZone.getDisplayName() + " - " + simpleTimeZone.observesDaylightTime());

   }
}