Java Utililty Methods Date Before

List of utility methods to do Date Before

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Description

The list of methods to do Date Before are organized into topic(s).

Method

DategetBeforeOrAfterDateByDayNumber(int dayNumber)
get Before Or After Date By Day Number 
return getBeforeOrAfterDateByDayNumber(new Date(), dayNumber);
DategetDateBefore(Date d, int day)
get Date Before 
Calendar now = Calendar.getInstance();
now.setTime(d);
now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date date = simpleDateFormat.parse(simpleDateFormat.format(now.getTime()));
return date;
DategetDateBefore(Date d, int day)
get Date Before 
Calendar now = Calendar.getInstance();
now.setTime(d);
now.set(Calendar.HOUR_OF_DAY, 0);
now.set(Calendar.MINUTE, 0);
now.set(Calendar.SECOND, 0);
now.set(Calendar.MILLISECOND, 0);
now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
return now.getTime();
...
DategetDateBefore(Date date, int days)
Get date before the input date according to param-days 
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(java.util.Calendar.DAY_OF_YEAR, days);
return calendar.getTime();
StringgetDateBefore(int offsetDay, String strFormat)
get Date Before 
String strDay = "";
long nNow = getTimestamp();
long mydate = nNow - (long) offsetDay * 24 * 3600 * 1000;
SimpleDateFormat sdf = new SimpleDateFormat(strFormat);
strDay = sdf.format(new Date(mydate));
return strDay;
DategetDateBefore(int year, int month, int day)
get Date Before 
Date result = new Date();
Calendar calendar = Calendar.getInstance();
calendar.setTime(result);
calendar.add(Calendar.YEAR, year);
calendar.add(Calendar.MONTH, month);
calendar.add(Calendar.DAY_OF_MONTH, day);
result = calendar.getTime();
return result;
...
StringgetDateBefore(String d, int day)
get Date Before 
SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
Calendar now = Calendar.getInstance();
try {
    now.setTime(format.parse(d));
    now.set(Calendar.DATE, now.get(Calendar.DATE) - day);
} catch (ParseException e) {
    e.printStackTrace();
return format.format(now.getTime());
DategetDateBeforeHours(Date date, int hours)
get Date Before Hours 
return getDateAfterHours(date, 0 - hours);
DategetDateBeforeNextMonth(Date date, Integer month, Integer day)
get Date Before Next Month 
if (date == null || month == null || day == null) {
    return date;
Calendar cal = Calendar.getInstance(Locale.CHINA);
cal.setTime(date);
cal.add(Calendar.MONTH, month);
cal.add(Calendar.DATE, day);
return cal.getTime();
...
DategetDateBeforeOrAfter(int iDate)
get Date Before Or After 
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DAY_OF_MONTH, iDate);
return cal.getTime();