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#BAEL-16646 move https://www.baeldung.com/java-date-difference in new module java-dates-computations

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Alessio Stalla
2019-09-29 11:13:08 +02:00
parent f59fa07851
commit 491a912090
7 changed files with 68 additions and 8 deletions
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1
java-dates/README.md
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@@ -6,7 +6,6 @@
- [TemporalAdjuster in Java](http://www.baeldung.com/java-temporal-adjuster)
- [Handling Daylight Savings Time in Java](http://www.baeldung.com/java-daylight-savings)
- [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
- [Difference Between Two Dates in Java](http://www.baeldung.com/java-date-difference)
- [Migrating to the New Java 8 Date Time API](http://www.baeldung.com/migrating-to-java-8-date-time-api)
- [Introduction to the Java 8 Date/Time API](http://www.baeldung.com/java-8-date-time-intro)
- [Get the Current Date, Time and Timestamp in Java 8](http://www.baeldung.com/current-date-time-and-timestamp-in-java-8)

6
java-dates/pom.xml
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@@ -37,12 +37,6 @@
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<dependency>
<groupId>com.darwinsys</groupId>
<artifactId>hirondelle-date4j</artifactId>
<version>RELEASE</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>

115
java-dates/src/test/java/com/baeldung/date/DateDiffUnitTest.java
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@@ -1,115 +0,0 @@
package com.baeldung.date;
import org.junit.Test;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Duration;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.Period;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.temporal.ChronoUnit;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
import static org.junit.Assert.assertEquals;
public class DateDiffUnitTest {
@Test
public void givenTwoDatesBeforeJava8_whenDifferentiating_thenWeGetSix() throws ParseException {
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy", Locale.ENGLISH);
Date firstDate = sdf.parse("06/24/2017");
Date secondDate = sdf.parse("06/30/2017");
long diffInMillies = Math.abs(secondDate.getTime() - firstDate.getTime());
long diff = TimeUnit.DAYS.convert(diffInMillies, TimeUnit.MILLISECONDS);
assertEquals(diff, 6);
}
@Test
public void givenTwoDatesInJava8_whenDifferentiating_thenWeGetSix() {
LocalDate now = LocalDate.now();
LocalDate sixDaysBehind = now.minusDays(6);
Period period = Period.between(now, sixDaysBehind);
int diff = period.getDays();
assertEquals(diff, 6);
}
@Test
public void givenTwoDateTimesInJava8_whenDifferentiating_thenWeGetSix() {
LocalDateTime now = LocalDateTime.now();
LocalDateTime sixMinutesBehind = now.minusMinutes(6);
Duration duration = Duration.between(now, sixMinutesBehind);
long diff = Math.abs(duration.toMinutes());
assertEquals(diff, 6);
}
@Test
public void givenTwoDateTimesInJava8_whenDifferentiatingInSeconds_thenWeGetTen() {
LocalDateTime now = LocalDateTime.now();
LocalDateTime tenSecondsLater = now.plusSeconds(10);
long diff = ChronoUnit.SECONDS.between(now, tenSecondsLater);
assertEquals(diff, 10);
}
@Test
public void givenTwoZonedDateTimesInJava8_whenDifferentiating_thenWeGetSix() {
LocalDateTime ldt = LocalDateTime.now();
ZonedDateTime now = ldt.atZone(ZoneId.of("America/Montreal"));
ZonedDateTime sixDaysBehind = now.withZoneSameInstant(ZoneId.of("Asia/Singapore")).minusDays(6);
long diff = ChronoUnit.DAYS.between(sixDaysBehind, now);
assertEquals(diff, 6);
}
@Test
public void givenTwoDateTimesInJava8_whenDifferentiatingInSecondsUsingUntil_thenWeGetTen() {
LocalDateTime now = LocalDateTime.now();
LocalDateTime tenSecondsLater = now.plusSeconds(10);
long diff = now.until(tenSecondsLater, ChronoUnit.SECONDS);
assertEquals(diff, 10);
}
@Test
public void givenTwoDatesInJodaTime_whenDifferentiating_thenWeGetSix() {
org.joda.time.LocalDate now = org.joda.time.LocalDate.now();
org.joda.time.LocalDate sixDaysBehind = now.minusDays(6);
org.joda.time.Period period = new org.joda.time.Period(now, sixDaysBehind);
long diff = Math.abs(period.getDays());
assertEquals(diff, 6);
}
@Test
public void givenTwoDateTimesInJodaTime_whenDifferentiating_thenWeGetSix() {
org.joda.time.LocalDateTime now = org.joda.time.LocalDateTime.now();
org.joda.time.LocalDateTime sixMinutesBehind = now.minusMinutes(6);
org.joda.time.Period period = new org.joda.time.Period(now, sixMinutesBehind);
long diff = Math.abs(period.getDays());
}
@Test
public void givenTwoDatesInDate4j_whenDifferentiating_thenWeGetSix() {
hirondelle.date4j.DateTime now = hirondelle.date4j.DateTime.now(TimeZone.getDefault());
hirondelle.date4j.DateTime sixDaysBehind = now.minusDays(6);
long diff = Math.abs(now.numDaysFrom(sixDaysBehind));
assertEquals(diff, 6);
}
}