now() LocalDateTime localDateTimePlus8 = LocalDateTime. systemDefault() ZoneId zoneIdPlus9 = ZoneId. But, we also can specify the specific time zone for us. When we transfer Instant to LocalDateTime, we will use the default time zone of system. The Instant don’t have the time zone or calendar condition. I will implement these three classes on LocalDateTime section. out.printf( "%d years %d months %d days", period.getYears(), period.getMonths(), period.getDays()) ZoneId, ZoneOffset, Clock parse( "") LocalDate endDate = LocalDate. out.println(instant) LocalDate startDate = LocalDate. It is similar as Duration, but it handle calendar and date issues. If we need to operate by day, we can use Period. out.println(duration.getSeconds()) Period out.println(newInstance) duration = Duration. now() Instant newInstance = instant.minus(duration) System. Or, do the time calculation by plus() or minus(). Can be used to calculate the different of time by between(). Because before that we don’t have this kind of ability to find the duration of time or manipulate time. out.println(date) instant = date.toInstant() System. out.println(instant) instant = usSeconds(1L) System. It can be controlled down to nano second. There three class are also support ISO 8601 date time format operations.
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