Java 8 - Примеры периода и продолжительности

Несколько примеров, которые покажут вам, как использовать объекты Java 8Duration,Period иChronoUnit, чтобы узнать разницу между датами.

Продолжительность - время в секундах и наносекундах.
Период - измеряет время в годах, месяцах и днях.

1. Пример продолжительности

Примерjava.time.Duration для определения разницы в секундах между двумяLocalDateTime

DurationExample.java

package com.example.time;

import java.time.Duration;
import java.time.LocalDateTime;
import java.time.Month;
import java.time.temporal.ChronoUnit;

public class DurationExample {

    public static void main(String[] args) {

        // Creating Durations
        System.out.println("--- Examples --- ");

        Duration oneHours = Duration.ofHours(1);
        System.out.println(oneHours.getSeconds() + " seconds");

        Duration oneHours2 = Duration.of(1, ChronoUnit.HOURS);
        System.out.println(oneHours2.getSeconds() + " seconds");

        // Test Duration.between
        System.out.println("\n--- Duration.between --- ");

        LocalDateTime oldDate = LocalDateTime.of(2016, Month.AUGUST, 31, 10, 20, 55);
        LocalDateTime newDate = LocalDateTime.of(2016, Month.NOVEMBER, 9, 10, 21, 56);

        System.out.println(oldDate);
        System.out.println(newDate);

        //count seconds between dates
        Duration duration = Duration.between(oldDate, newDate);

        System.out.println(duration.getSeconds() + " seconds");

    }
}

Выход

--- Examples ---
3600 seconds
3600 seconds

--- Duration.between ---
2016-08-31T10:20:55
2016-11-09T10:21:56
6048061 seconds

2. Пример периода

Примерjava.time.Period, чтобы узнать по-разному (годы, месяцы, дни) между двумяLocalDates

PeriodExample.java

package com.example.time;

import java.time.LocalDate;
import java.time.Month;
import java.time.Period;

public class PeriodExample {

    public static void main(String[] args) {

        System.out.println("--- Examples --- ");

        Period tenDays = Period.ofDays(10);
        System.out.println(tenDays.getDays()); //10

        Period oneYearTwoMonthsThreeDays = Period.of(1, 2, 3);
        System.out.println(oneYearTwoMonthsThreeDays.getYears());   //1
        System.out.println(oneYearTwoMonthsThreeDays.getMonths());  //2
        System.out.println(oneYearTwoMonthsThreeDays.getDays());    //3

        System.out.println("\n--- Period.between --- ");
        LocalDate oldDate = LocalDate.of(1982, Month.AUGUST, 31);
        LocalDate newDate = LocalDate.of(2016, Month.NOVEMBER, 9);

        System.out.println(oldDate);
        System.out.println(newDate);

        // check period between dates
        Period period = Period.between(oldDate, newDate);

        System.out.print(period.getYears() + " years,");
        System.out.print(period.getMonths() + " months,");
        System.out.print(period.getDays() + " days");

    }
}

Выход

--- Examples ---
10
1
2
3

--- Period.between ---
1982-08-31
2016-11-09
34 years,2 months,9 days

3. Пример ChronoUnit

В качестве альтернативы вы можете использоватьChronoUnit.{unit}.between, чтобы узнать разницу между датами, просмотрите следующий пример:

ChronoUnitExample.java

package com.example.time;

import java.time.LocalDateTime;
import java.time.Month;
import java.time.temporal.ChronoUnit;

public class ChronoUnitExample {

    public static void main(String[] args) {

        LocalDateTime oldDate = LocalDateTime.of(1982, Month.AUGUST, 31, 10, 20, 55);
        LocalDateTime newDate = LocalDateTime.of(2016, Month.NOVEMBER, 9, 10, 21, 56);

        System.out.println(oldDate);
        System.out.println(newDate);

        // count between dates
        long years = ChronoUnit.YEARS.between(oldDate, newDate);
        long months = ChronoUnit.MONTHS.between(oldDate, newDate);
        long weeks = ChronoUnit.WEEKS.between(oldDate, newDate);
        long days = ChronoUnit.DAYS.between(oldDate, newDate);
        long hours = ChronoUnit.HOURS.between(oldDate, newDate);
        long minutes = ChronoUnit.MINUTES.between(oldDate, newDate);
        long seconds = ChronoUnit.SECONDS.between(oldDate, newDate);
        long milis = ChronoUnit.MILLIS.between(oldDate, newDate);
        long nano = ChronoUnit.NANOS.between(oldDate, newDate);

        System.out.println("\n--- Total --- ");
        System.out.println(years + " years");
        System.out.println(months + " months");
        System.out.println(weeks + " weeks");
        System.out.println(days + " days");
        System.out.println(hours + " hours");
        System.out.println(minutes + " minutes");
        System.out.println(seconds + " seconds");
        System.out.println(milis + " milis");
        System.out.println(nano + " nano");

    }
}

Выход

1982-08-31T10:20:55
2016-11-09T10:21:56

--- Total ---
34 years
410 months
1784 weeks
12489 days
299736 hours
17984161 minutes
1079049661 seconds
1079049661000 milis
1079049661000000000 nano

TOC

Java 8 - Примеры периода и продолжительности