Java Utililty Methods Day Add

List of utility methods to do Day Add

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Description

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

Method

StringaddDay(java.util.Date dt, long day)
add date 
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
sdf.setTimeZone(getTimeZone());
return sdf.format(addDate(dt, day));
StringaddDay(String currentdate, int add_day)
add Day 
GregorianCalendar gc = null;
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
int year, month, day;
try {
    year = Integer.parseInt(currentdate.substring(0, 4));
    month = Integer.parseInt(currentdate.substring(5, 7)) - 1;
    day = Integer.parseInt(currentdate.substring(8, 10));
    gc = new GregorianCalendar(year, month, day);
...
DateaddDay(String d)
add Day 
SimpleDateFormat sd = new SimpleDateFormat(DATE_FORMAT);
Date daten = null;
try {
    daten = sd.parse(d);
} catch (ParseException e) {
    e.printStackTrace();
Calendar c = Calendar.getInstance();
...
StringaddDay(String data)
add Day 
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar cd = Calendar.getInstance();
try {
    cd.setTime(sdf.parse(data));
    cd.add(5, 1);
} catch (ParseException e) {
    e.printStackTrace();
return sdf.format(cd.getTime());
DateaddDay(String datetime, int day)
add Day 
Calendar cal = Calendar.getInstance();
cal.setTime(parseDate(datetime));
cal.add(Calendar.DAY_OF_YEAR, day);
return cal.getTime();
longaddDayInterval(long millis, int dayInterval)
addDayInterval 
Calendar calendar = new GregorianCalendar(TimeZone.getTimeZone("GMT")); 
calendar.setTimeInMillis(millis);
calendar.add(Calendar.DAY_OF_MONTH, dayInterval);
return calendar.getTimeInMillis();
DateaddDays(Date aDate, int days)
Add days to a date by value. 
return addTime(aDate, (24 * days), Calendar.HOUR);
DateaddDays(Date baseDate, int amount, boolean endOfDay)
Adds the specified number of days to the stated. 
Calendar cal = Calendar.getInstance();
synchronized (cal) {
    cal.setTime(baseDate);
    cal.add(Calendar.DATE, amount);
if (endOfDay) {
    return endOfDay(cal.getTime());
return cal.getTime();
DateaddDays(Date beginDate, int days)
add Days 
return changeTime(Calendar.DAY_OF_YEAR, beginDate, days);
DateaddDays(Date d, double count)
add count days days is truncated to second and can be negative 
if (d == null) {
    return null;
int sec = (int) (count * 3600 * 24);
int sign = 1;
if (sec < 0) {
    sec = -sec;
    sign = -1;
...