Date
setToDayStartTime(Date date) set To Day Start Time
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(date.getTime());
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
Date
beginOfTheDay(Date date) begin Of The Day
Calendar c = new GregorianCalendar();
c.setTime(date);
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
return c.getTime();