两个 LocalTime 之间的时间量

计算两个 LocalTime：（1）到 until(Temporal, TemporalUnit) 方法和（2）TemporalUnit.between(Temporal, Temporal) 之间的时间单位有两种等效方法。

import java.time.LocalTime;
import java.time.temporal.ChronoUnit;

public class AmountOfTime {

    public static void main(String[] args) {

        LocalTime start = LocalTime.of(1, 0, 0); // hour, minute, second
        LocalTime end = LocalTime.of(2, 10, 20); // hour, minute, second
        
        long halfDays1 = start.until(end, ChronoUnit.HALF_DAYS); // 0
        long halfDays2 = ChronoUnit.HALF_DAYS.between(start, end); // 0
        
        long hours1 = start.until(end, ChronoUnit.HOURS); // 1
        long hours2 = ChronoUnit.HOURS.between(start, end); // 1
        
        long minutes1 = start.until(end, ChronoUnit.MINUTES); // 70
        long minutes2 = ChronoUnit.MINUTES.between(start, end); // 70
        
        long seconds1 = start.until(end, ChronoUnit.SECONDS); // 4220
        long seconds2 = ChronoUnit.SECONDS.between(start, end); // 4220
        
        long millisecs1 = start.until(end, ChronoUnit.MILLIS); // 4220000
        long millisecs2 = ChronoUnit.MILLIS.between(start, end); // 4220000

        long microsecs1 = start.until(end, ChronoUnit.MICROS); // 4220000000
        long microsecs2 = ChronoUnit.MICROS.between(start, end); // 4220000000

        long nanosecs1 = start.until(end, ChronoUnit.NANOS); // 4220000000000
        long nanosecs2 = ChronoUnit.NANOS.between(start, end); // 4220000000000
        
        // Using others ChronoUnit will be thrown UnsupportedTemporalTypeException.
        // The following methods are examples thereof.
        long days1 = start.until(end, ChronoUnit.DAYS); 
        long days2 = ChronoUnit.DAYS.between(start, end); 
    }
}