Java Utililty Methods ZonedDateTime Calculate

List of utility methods to do ZonedDateTime Calculate

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Description

The list of methods to do ZonedDateTime Calculate are organized into topic(s).

Method

ZonedDateTimecurrentZonedDateTime()
current Zoned Date Time 
Calendar now = Calendar.getInstance();
ZonedDateTime zdt = ZonedDateTime.ofInstant(now.toInstant(), ZoneId.systemDefault());
return zdt;
longdifference(ZonedDateTime t1, ZonedDateTime t2)
difference 
return t2.toInstant().toEpochMilli() - t1.toInstant().toEpochMilli();
longdiffMs(ZonedDateTime date1, ZonedDateTime date2)
Finds the difference (in ms) between two LocalDateTime. 
return Duration.between(date1, date2).getSeconds() * 1000;
LongelapsedTime(ZonedDateTime zonedDateTime)
elapsed Time 
return difference(zonedDateTime, ZonedDateTime.now());
booleanequals(ZonedDateTime ZDT1, ZonedDateTime ZDT2)
equals 
return ZDT1 == null ? ZDT2 == null : ZDT2 == null ? false : ZDT1.equals(ZDT2);
Setfilter(final Set list, final ZonedDateTime base, final long minute)
filter 
if (list == null || base == null) {
    throw new IllegalArgumentException("args must not be null");
if (minute < 0) {
    throw new IllegalArgumentException("minute must be potitive");
final Set<ZonedDateTime> result = list.stream().filter(p -> {
    final long diff = Duration.between(base, p).toMinutes();
...
intfindIdx(int startidx, int endidx, ZonedDateTime endDate, List holidays)
find Idx 
if (startidx == endidx) {
    return startidx;
int pivot = (endidx - startidx) / 2;
if (holidays.get(pivot).equals(endDate)) {
    return pivot;
if (holidays.get(pivot).isBefore(endDate)) {
...
longgetDuration(ZonedDateTime input, TemporalField roundTo, int roundIncrement)
Returns the time in nanoseconds (long) until the next rounded time. 
int field = input.get(roundTo);
int r = field % roundIncrement;
ZonedDateTime ceiling = input.plus(roundIncrement - r, roundTo.getBaseUnit())
        .truncatedTo(roundTo.getBaseUnit());
return Duration.between(input, ceiling).getSeconds();
StringgetShortStringDate(ZonedDateTime time)
get Short String Date 
return time.format(DateTimeFormatter.ISO_LOCAL_DATE);
ZonedDateTimegetStartOfDay(ZoneId zoneId, ZonedDateTime time)
get Start Of Day 
return time.withZoneSameInstant(zoneId).truncatedTo(ChronoUnit.DAYS);