Java 8 – Difference between two LocalDate or LocalDateTime

In Java 8, we can use Period, Duration or ChronoUnit to calculate the difference between two LocalDate or LocaldateTime.

1. Period to calculate the difference between two LocalDate.
2. Duration to calculate the difference between two LocalDateTime.
3. ChronoUnit for everything.

1. Period

JavaLocalDate.java

package com.favtuts.time;

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

public class DifferenceLocalDateTime {
    
    public static void main(String[] args) {
        diffTwoLocalDate();
    }

    static void diffTwoLocalDate() {
        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");
    }
}

Output

0 years,5 months,6 days

2. Duration

JavaLocalDateTime.java

package com.favtuts.time;

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

public class DifferenceLocalDateTime {

    public static void main(String[] args) {
        diffTwoLocalDateTime();
    }

    static void diffTwoLocalDateTime() {
        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");
    }
}

Output

6 days
144 hours
8640 minutes
518406 seconds
518406 seconds

3. ChronoUnit

JavaChronoUnit.java

package com.favtuts.time;

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

public class DifferenceLocalDateTime {

    public static void main(String[] args) {
        // diffTwoLocalDate();
        // diffTwoLocalDateTime();
        useChronoUnitForDifference();
    }

    static void useChronoUnitForDifference() {
        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");
    }
}

Output

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

Download Source Code

$ git clone https://github.com/favtuts/java-core-tutorials-examples

$ cd java-basic/time

References

• Java 8 – Period and Duration examples
• How to compare dates in Java