Java Utililty Methods Day Start

List of utility methods to do Day Start

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Description

The list of methods to do Day Start are organized into topic(s).

Method

DatestartOfDay(Date aDate)
start Of Day 
Calendar cal = GregorianCalendar.getInstance();
cal.setTime(aDate);
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.HOUR_OF_DAY, 0);
Date dayBreak = cal.getTime();
return dayBreak;
...
DatestartOfDay(Date aDate)
Compute day break of the date provided. 
Calendar cal = GregorianCalendar.getInstance();
cal.setTime(aDate);
cal.set(Calendar.MILLISECOND, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.HOUR_OF_DAY, 0);
Date dayBreak = cal.getTime();
return dayBreak;
...
DatestartOfDay(Date date)
Resettet die Uhrzeit eines Datums. 
if (date == null)
    return null;
Calendar cal = Calendar.getInstance();
cal.setTime(date == null ? new Date() : date);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);
...
DatestartOfDay(Date date)
Get the first hour, minute, second of the date specified 
Calendar calendar = CALENDAR;
synchronized (calendar) {
    calendar.setTime(date);
    calendar.set(Calendar.HOUR_OF_DAY, 0);
    calendar.set(Calendar.MILLISECOND, 0);
    calendar.set(Calendar.SECOND, 0);
    calendar.set(Calendar.MINUTE, 0);
    return calendar.getTime();
...
DatestartOfDay(Date dateInst)
Method to return a "normalized" version of the input Date whose time is reset to the absolute start of that same day (first millisecond of first second of first minute of first hour). 
if (dateInst == null) {
    throw new IllegalArgumentException();
final Calendar cal = new GregorianCalendar();
cal.setTime(dateInst);
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.SECOND, 0);
...
DatestartOfDay(Date inDate, TimeZone timeZone)
Calculate the start of day date time (i.e. 
GregorianCalendar c1 = new GregorianCalendar();
c1.setTimeZone(timeZone);
c1.setTime(inDate);
GregorianCalendar c2 = new GregorianCalendar(c1.get(Calendar.YEAR), c1.get(Calendar.MONTH),
        c1.get(Calendar.DATE));
c2.setTimeZone(timeZone);
return c2.getTime();
DatestartOfDay(Date value)
Return the start of a day containing a specified time 
Calendar working = new GregorianCalendar();
working.setTime(value);
working.set(Calendar.HOUR_OF_DAY, 0);
working.set(Calendar.MINUTE, 0);
working.set(Calendar.SECOND, 0);
working.set(Calendar.MILLISECOND, 0);
return working.getTime();
CalendarstartOfDay(final Date date)
start Of Day 
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
setStartOfDay(calendar);
return calendar;
DatestartOfDay(final Date date)
start Of Day 
final GregorianCalendar dateCalendar = new GregorianCalendar();
dateCalendar.setTime(date);
return new GregorianCalendar(dateCalendar.get(YEAR), dateCalendar.get(MONTH),
        dateCalendar.get(DAY_OF_MONTH)).getTime();
longstartOfDayInMillis(long date)
Returns day in millis with the hours, milliseconds, seconds and minutes set to 0. 
Calendar calendar = Calendar.getInstance();
synchronized (calendar) {
    calendar.setTimeInMillis(date);
    calendar.set(Calendar.HOUR_OF_DAY, 0);
    calendar.set(Calendar.MILLISECOND, 0);
    calendar.set(Calendar.SECOND, 0);
    calendar.set(Calendar.MINUTE, 0);
    return calendar.getTimeInMillis();
...