Apache Common Java Tutorial

import java.util.Calendar;
import java.util.Date;
import java.util.Iterator;
import org.apache.commons.lang.time.DateUtils;
import org.apache.commons.lang.time.StopWatch;
public class MainClass {
    public static void main(String[] args) {
      StopWatch stWatch = new StopWatch();
      //Start StopWatch
      stWatch.start();
      //Get iterator for all days in a week starting Monday
      Iterator itr = DateUtils.iterator(new Date(),
              DateUtils.RANGE_WEEK_MONDAY);
      while (itr.hasNext()) {
          Calendar gCal = (Calendar) itr.next();
          System.out.println(gCal.getTime());
      }
      //Stop StopWatch
      stWatch.stop();
      System.out.println("Time Taken >>" + stWatch.getTime());
    }
}
Mon May 07 00:00:00 PDT 2007
Tue May 08 00:00:00 PDT 2007
Wed May 09 00:00:00 PDT 2007
Thu May 10 00:00:00 PDT 2007
Fri May 11 00:00:00 PDT 2007
Sat May 12 00:00:00 PDT 2007
Sun May 13 00:00:00 PDT 2007
Time Taken 32