Java 8 – Разница между двумя локальными датами или локальным временем

package com.mkyong.java8;

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

public class JavaLocalDate {

    public static void main(String[] args) {

        LocalDate from = LocalDate.of(2020, 5, 4);
        LocalDate to = LocalDate.of(2020, 10, 10);

        Period period = Period.between(from, to);

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

    }

}

0 years,5 months,6 days

package com.mkyong.java8;

import java.time.Duration;
import java.time.LocalDateTime;

public class JavaLocalDateTime {

    public static void main(String[] args) {

        LocalDateTime from = LocalDateTime.of(2020, 10, 4,
                10, 20, 55);
        LocalDateTime to = LocalDateTime.of(2020, 10, 10,
                10, 21, 1);

        Duration duration = Duration.between(from, to);

        // days between from and to
        System.out.println(duration.toDays() + " days");

        // hours between from and to
        System.out.println(duration.toHours() + " hours");

        // minutes between from and to
        System.out.println(duration.toMinutes() + " minutes");

        // seconds between from and to
        System.out.println(duration.toSeconds() + " seconds");
        System.out.println(duration.getSeconds() + " seconds");

    }

}

6 days
144 hours
8640 minutes
518406 seconds
518406 seconds

package com.mkyong.java8;

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

public class JavaChronoUnit {

    public static void main(String[] args) {

        LocalDateTime from = LocalDateTime.of(2020, 10, 4,
                10, 20, 55);
        LocalDateTime to = LocalDateTime.of(2020, 11, 10,
                10, 21, 1);

        long years = ChronoUnit.YEARS.between(from, to);
        long months = ChronoUnit.MONTHS.between(from, to);
        long weeks = ChronoUnit.WEEKS.between(from, to);
        long days = ChronoUnit.DAYS.between(from, to);
        long hours = ChronoUnit.HOURS.between(from, to);
        long minutes = ChronoUnit.MINUTES.between(from, to);
        long seconds = ChronoUnit.SECONDS.between(from, to);
        long milliseconds = ChronoUnit.MILLIS.between(from, to);
        long nano = ChronoUnit.NANOS.between(from, to);

        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(milliseconds + " milliseconds");
        System.out.println(nano + " nano");

    }

}

0 years
1 months
5 weeks
37 days
888 hours
53280 minutes
3196806 seconds
3196806000 milliseconds
3196806000000000 nano