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Difference Between Two LocalTime in Java - Java 147

Difference Between Two LocalTime in Java – Java 147

Difference Between Two LocalTime in Java

計算兩個時間差距，提供了幾種方法找到不同時間單位，取得兩者之前的差異，提供了一些常見的方法，例如： Duration 、 ChronoUnit 、 until 等方式， Calculate Difference Between Two LocalTime 可以計算兩個時間之間的差異，簡化了操作時間比對的方法 ，本篇增加了範例，並透過單元測試來驗證產出結果。

檔案目錄

./
   +- src
       +- test
       |   +- org
       |       +- ruoxue
       |           +- java_147
       |               +- datetime
       |                   +- localtime
       |                       +- DifferenceTwoLocalTimeTest.java

單元測試

Java Time Between Two LocalTime 計算兩個 LocalTime 物件的差異。

Duration_between

Java Time Between Two LocalTime 建立兩個 LocalTime ，使用 Duration between 靜態方法，可以採用不同的時間單位，計算兩者之間的差異。

	@Test
	public void Duration_between() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 123456789);
		Duration duration = Duration.between(localTime, localTime2);
		System.out.println(duration);

		long hours = duration.toHours();
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = duration.toMinutes();
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = duration.getSeconds();
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long nanos = duration.toNanos();
		System.out.println(nanos);
		assertThat(nanos).isEqualTo(3600000000000L);
	}
PT1H
1
60
3600
3600000000000

ChronoUnit_between

Java Time Between Two LocalTime 建立兩個 LocalTime ，使用 ChronoUnit Enum ，可以採用不同的時間單位，計算兩者之間的差異。

	@Test
	public void ChronoUnit_between() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 123456789);

		long hours = ChronoUnit.HOURS.between(localTime, localTime2);
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = ChronoUnit.MINUTES.between(localTime, localTime2);
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = ChronoUnit.SECONDS.between(localTime, localTime2);
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long milliseconds = ChronoUnit.MILLIS.between(localTime, localTime2);
		System.out.println(milliseconds);
		assertThat(milliseconds).isEqualTo(3600000);

		long nano = ChronoUnit.NANOS.between(localTime, localTime2);
		System.out.println(nano);
		assertThat(nano).isEqualTo(3600000000000L);
	}
1
60
3600
3600000
3600000000000

until

Java Time Between Two LocalTime 建立兩個 LocalTime ，可以採用不同的時間單位，計算兩者之間的差異， Java LocalTime Difference Between Two Dates 提供範例參考。

	@Test
	public void until() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 987654321);

		long hours = localTime.until(localTime2, ChronoUnit.HOURS);
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = localTime.until(localTime2, ChronoUnit.MINUTES);
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = localTime.until(localTime2, ChronoUnit.SECONDS);
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long milliseconds = localTime.until(localTime2, ChronoUnit.MILLIS);
		System.out.println(milliseconds);
		assertThat(milliseconds).isEqualTo(3600864);

		long nano = localTime.until(localTime2, ChronoUnit.NANOS);
		System.out.println(nano);
		assertThat(nano).isEqualTo(3600864197532L);
	}
1
60
3600
3600864
3600864197532

DifferenceTwoLocalTimeTest.java

Difference Between Two LocalTime in Multiple Units 新增單元測試，驗證 Java LocalTime Difference Between Two Dates 是否符合預期。

package org.ruoxue.java_147.datetime.localtime;

import static org.assertj.core.api.Assertions.assertThat;

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

import org.junit.Test;

public class DifferenceTwoLocalTimeTest {

	@Test
	public void Duration_between() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 123456789);
		Duration duration = Duration.between(localTime, localTime2);
		System.out.println(duration);

		long hours = duration.toHours();
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = duration.toMinutes();
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = duration.getSeconds();
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long nanos = duration.toNanos();
		System.out.println(nanos);
		assertThat(nanos).isEqualTo(3600000000000L);
	}

	@Test
	public void ChronoUnit_between() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 123456789);

		long hours = ChronoUnit.HOURS.between(localTime, localTime2);
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = ChronoUnit.MINUTES.between(localTime, localTime2);
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = ChronoUnit.SECONDS.between(localTime, localTime2);
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long milliseconds = ChronoUnit.MILLIS.between(localTime, localTime2);
		System.out.println(milliseconds);
		assertThat(milliseconds).isEqualTo(3600000);

		long nano = ChronoUnit.NANOS.between(localTime, localTime2);
		System.out.println(nano);
		assertThat(nano).isEqualTo(3600000000000L);
	}

	@Test
	public void until() {
		LocalTime localTime = LocalTime.of(9, 12, 5, 123456789);
		LocalTime localTime2 = LocalTime.of(10, 12, 5, 987654321);

		long hours = localTime.until(localTime2, ChronoUnit.HOURS);
		System.out.println(hours);
		assertThat(hours).isEqualTo(1);

		long minutes = localTime.until(localTime2, ChronoUnit.MINUTES);
		System.out.println(minutes);
		assertThat(minutes).isEqualTo(60);

		long seconds = localTime.until(localTime2, ChronoUnit.SECONDS);
		System.out.println(seconds);
		assertThat(seconds).isEqualTo(3600);

		long milliseconds = localTime.until(localTime2, ChronoUnit.MILLIS);
		System.out.println(milliseconds);
		assertThat(milliseconds).isEqualTo(3600864);

		long nano = localTime.until(localTime2, ChronoUnit.NANOS);
		System.out.println(nano);
		assertThat(nano).isEqualTo(3600864197532L);
	}
}

心得分享

Java LocalTime Difference Between Two Dates 計算時間，提供不同的時間單位，取得其差異，對時間進行運算更加方便，熟悉 Difference Between Two LocalTime in Multiple Units 這些方法的操作，提升開發效率，在應用上相當廣泛。

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