Java Utililty Methods Date Start

Date getStart(Date date)
Returns the given date with the time set to the start of the day.

return clearTime(date);

Date getStartDate(Date date)
get Start Date

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
return calendar.getTime();

Date getStartDate(Date date)
get Start Date

return getFirstOfMonthCalendar(date).getTime();

Date getStartDate(Date date)

Description:Get Monday of the week the day specified by parameter belongs to

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int day = calendar.get(Calendar.DAY_OF_WEEK);
int offset = offsets[day - Calendar.SUNDAY];
calendar.add(Calendar.DAY_OF_YEAR, offset);
return calendar.getTime();

String getStartDate(String date)
get Start Date

String startDate;
int year = getYear(date);
int month = getMonth(date);
int day = getDate(date);
int curDayOfWeek = getDayOfWeek(year, month, day);
int startTmp = 1 - curDayOfWeek;
Calendar tmpCalendar = Calendar.getInstance();
tmpCalendar.set(year, month - 1, day);
...

Date getStartDateOfCurrentSemester()
get Start Date Of Current Semester

Calendar cal = Calendar.getInstance();
int month = cal.get(Calendar.MONTH);
int year = cal.get(Calendar.YEAR);
if (month >= 9 && month <= 2) {
 cal.set(year, Calendar.OCTOBER, 1, 0, 0, 0);
 return cal.getTime();
} else {
 cal.set(year, Calendar.APRIL, 1, 0, 0, 0);
...

Date getStartDateOfCurrMonth()
get Start Date Of Curr Month

Calendar now = Calendar.getInstance();
now.set(now.get(Calendar.YEAR), now.get(Calendar.MONTH), 1);
return now.getTime();

GregorianCalendar getStartDay(Date date)
get Start Day

GregorianCalendar cal = new GregorianCalendar();
cal.setTime(date);
for (int field = 0; field < 5; field++)
 cal.set(ORDERED_DATE_FIELD[field], 0);
return cal;

Date getStartDayOfNextMonth(Date date)
get Start Day Of Next Month

Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.MONTH, 1);
c.set(Calendar.DAY_OF_MONTH, 1);
date = c.getTime();
return date;

Date getStartOfDate(final Date date)
Get start of date.

if (date == null)
 return null;
Calendar cal = GregorianCalendar.getInstance();
cal.setTime(date);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
...