java code to get the date of second sunday of march of every year

[Former Member]

Hi all,

i need some java code to get date of second sunday in march and first sunday in november of every year.

this is very urgent

plz help

thanks in advance

jhansi

[Former Member · Accepted solution]

Maybe this one is a little bit easier

import java.util.Calendar;
import java.util.Date;

public class Test {

	public static void main (String args[]) {
	
		System.out.println (getSecondSundayOfMarch());
		System.out.println (getFirstSundayOfNovember());
		
	}

	public static final Date getSecondSundayOfMarch () {
		
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.MONTH, Calendar.MARCH);
		cal.setFirstDayOfWeek(Calendar.SUNDAY);
		cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
		cal.set(Calendar.WEEK_OF_MONTH,2);
		return cal.getTime();
	}
	
	public static final Date getFirstSundayOfNovember () {
		Calendar cal = Calendar.getInstance();
		cal.set(Calendar.MONTH, Calendar.NOVEMBER);
		cal.setFirstDayOfWeek(Calendar.SUNDAY);
		cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
		cal.set(Calendar.WEEK_OF_MONTH,1);
		return cal.getTime();
	}
	
}

regards franz

reward points if useful

[Former Member]

Hi

Use this

http://java.sun.com/j2se/1.4.2/docs/api/java/util/Calendar.html#DAY_OF_WEEK

for complete reference.

Thanks

[iaki_vila]

If you want to do more simply:

public static final String[] DAYS = { "", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday" , "Wednesday", };

public static String getDate(String sDate) {

StringTokenizer st = new StringTokenizer(sDate, "-");

int date = Integer.parseInt(st.nextToken());

int month = Integer.parseInt(st.nextToken());

int year = Integer.parseInt(st.nextToken());

Calendar cal = Calendar.getInstance();

cal.set(year, month, date);

int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);

return DAYS[dayOfWeek];

}

usage:

...

Now you do a "while" and ask the later function until you fin the second sunday of march and the first sunday of november.

Regards.

[Former Member]

Hi

Thank you for the code. But can u give me the complete code, as I dont have any idea to use date classes.

[aashish_sinha]

Try This ..

private static final String PST_2007_START_DST = "03/11/2007";

private static final String PST_2007_END_DST = "11/04/2007";

private static final String PST_TIMEZONE_LOCATION = "PST";

private static final String DATE_FORMAT = "MM/dd/yyyy";

private Date startDST;

private Date endDST;

private String startDSTString;

private String endDSTString;

private TimeZone timeZone;

private String timezonLocation;

public CheckDST(String timezonLocation, String entryDate, String exitDate)

throws Exception {

this.timezonLocation = timezonLocation;

this.startDSTString = entryDate;;

this.endDSTString = exitDate;

if (!isValidTimeZone(timezonLocation)){

throw new Exception("Not a valid Timezone: " + timezonLocation);

}

timeZone = TimeZone.getTimeZone(timezonLocation);

startDST = this.stringToDate(entryDate, DATE_FORMAT);

endDST = this.stringToDate(exitDate, DATE_FORMAT);

}

Then you main to implement..

and the functions like

public static boolean dstStartDateIsTransitioningProperly(TimeZone timezone, Date startDST){

return (!timezone.inDaylightTime(previousDay(startDST)) &&

timezone.inDaylightTime(dayAfter(startDST)));

}

public static boolean dstExitDateIsTransitioningProperly(TimeZone timezone, Date endDST){

return (timezone.inDaylightTime(previousDay(endDST)) &&

!timezone.inDaylightTime(dayAfter(endDST)));

}

public static boolean isValidTimeZone(String timezoneLocation) {

String[] allTimeZoneIds = TimeZone.getAvailableIDs();

boolean foundTimezone = false;

for (int i = 0; i < allTimeZoneIds.length; i++) {

if (timezoneLocation.equals(allTimeZoneIds<i>)) {

foundTimezone = true;

break;

}

}

return foundTimezone;

}

public boolean entryDSTWorksProperly() {

return dstStartDateIsTransitioningProperly(this.timeZone, this.startDST);

}

public boolean exitDSTWorksProperly() {

return dstExitDateIsTransitioningProperly(this.timeZone, this.endDST);

}

private Date stringToDate(String dateStr, String dateFormat)

throws java.text.ParseException {

SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateFormat);

return simpleDateFormat.parse(dateStr);

}

private static Date previousDay(Date date) {

return new Date(date.getTime() - 1000 * 60 * 60 * 24);

}

private static Date dayAfter(Date date) {

return new Date(date.getTime() + 1000 * 60 * 60 * 24);

}