Java 8 は、負の値を処理しながら、2 つの LocalDate 間の時間差をどのように正確に計算できるでしょうか?

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

public class Main {

    public static void main(String[] args) {
        LocalDateTime toDateTime = LocalDateTime.of(2014, 9, 9, 19, 46, 45);
        LocalDateTime fromDateTime = LocalDateTime.of(1984, 12, 16, 7, 45, 55);

        long years = ChronoUnit.YEARS.between(fromDateTime, toDateTime);
        long months = ChronoUnit.MONTHS.between(fromDateTime, toDateTime);
        long days = ChronoUnit.DAYS.between(fromDateTime, toDateTime);
        long hours = ChronoUnit.HOURS.between(fromDateTime, toDateTime);
        long minutes = ChronoUnit.MINUTES.between(fromDateTime, toDateTime);
        long seconds = ChronoUnit.SECONDS.between(fromDateTime, toDateTime);

        System.out.println(years + " years " + months + " months " + days + " days " +
                hours + " hours " + minutes + " minutes " + seconds + " seconds.");
    }
}