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BAEL-9203 Getting the Number of Weeks Between Two Dates in Java #18408

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Merged
merged 11 commits into from
Apr 13, 2025
Merged

BAEL-9203 Getting the Number of Weeks Between Two Dates in Java #18408

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9cafde4
Update pom.xml
Deepak-Vohra Mar 16, 2025
d6cf64c
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
12bff68
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
21f76ab
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
348ea5b
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
2076380
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
9737cb0
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
91c1645
Update DateDiffUnitTest.java
Deepak-Vohra Mar 16, 2025
875b58c
Update DateDiffUnitTest.java
Deepak-Vohra Mar 20, 2025
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Deepak-Vohra Mar 20, 2025
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Deepak-Vohra Mar 22, 2025
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4 changes: 2 additions & 2 deletions core-java-modules/core-java-date-operations/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -49,8 +49,8 @@
</build>

<properties>
<joda-time.version>2.12.5</joda-time.version>
<joda-time.version>2.13.1</joda-time.version>
<hirondelle-date4j.version>RELEASE</hirondelle-date4j.version>
</properties>

</project>
</project>
46 changes: 45 additions & 1 deletion ...a-modules/core-java-date-operations/src/test/java/com/baeldung/date/DateDiffUnitTest.java
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Original file line number Diff line number Diff line change
@@ -1,7 +1,10 @@
package com.baeldung.date;

import org.joda.time.DateTime;
import org.joda.time.Weeks;
import org.joda.time.Days;
import org.joda.time.Minutes;

import org.junit.Test;

import java.text.ParseException;
Expand All @@ -17,7 +20,7 @@
import java.util.Locale;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;

import static org.junit.Assert.*;

public class DateDiffUnitTest {
Expand Down Expand Up @@ -66,6 +69,16 @@ public void givenTwoDatesInJava8_whenUsingPeriod_thenWeGet0Year1Month29Days() {
assertArrayEquals(new int[] { 0, 1, 29 }, new int[] { years, months, days });
}

@Test
public void givenTwoLocalDatesInJava8_whenUsingChronoUnitWeeksBetween_thenFindIntegerWeeks() {
LocalDate startLocalDate = LocalDate.of(2024, 01, 10);
LocalDate endLocalDate = LocalDate.of(2024, 11, 15);

long weeksDiff = ChronoUnit.WEEKS.between(startLocalDate, endLocalDate);

assertEquals(44, weeksDiff);
}

@Test
public void givenTwoDateTimesInJava8_whenDifferentiating_thenWeGetSix() {
LocalDateTime now = LocalDateTime.now();
Expand Down Expand Up @@ -97,6 +110,16 @@ public void givenTwoZonedDateTimesInJava8_whenDifferentiating_thenWeGetSix() {
assertEquals(6, diff);
}

@Test
public void givenTwoZonedDateTimesInJava8_whenUsingChronoUnitWeeksBetween_thenFindIntegerWeeks() {
ZonedDateTime startDateTime = ZonedDateTime.parse("2022-02-01T00:00:00Z[UTC]");
ZonedDateTime endDateTime = ZonedDateTime.parse("2022-10-31T23:59:59Z[UTC]");

long weeksDiff = ChronoUnit.WEEKS.between(startDateTime, endDateTime);

assertEquals(38, weeksDiff);
}

@Test
public void givenTwoDateTimesInJava8_whenDifferentiatingInSecondsUsingUntil_thenWeGetTen() {
LocalDateTime now = LocalDateTime.now();
Expand Down Expand Up @@ -127,6 +150,27 @@ public void givenTwoDateTimesInJodaTime_whenDifferentiating_thenWeGetSix() {

}

@Test
public void givenTwoDateTimesInJodaTime_whenComputingDistanceInWeeks_thenFindIntegerWeeks() {
DateTime dateTime1 = new DateTime(2024, 1, 17, 15, 50, 30);
DateTime dateTime2 = new DateTime(2024, 6, 3, 10, 20, 55);

int weeksDiff = Weeks.weeksBetween(dateTime1, dateTime2).getWeeks();

assertEquals(19, weeksDiff);
}

@Test
public void givenTwoDateTimesInJodaTime_whenComputingDistanceInDecimalWeeks_thenFindDecimalWeeks() {
DateTime dateTime1 = new DateTime(2024, 1, 17, 15, 50, 30);
DateTime dateTime2 = new DateTime(2024, 6, 3, 10, 20, 55);

int days = Days.daysBetween(dateTime1, dateTime2).getDays();
float weeksDiff=(float) (days/7.0);

assertEquals(19.571428, weeksDiff,0.001);
}

@Test
public void givenTwoDatesInDate4j_whenDifferentiating_thenWeGetSix() {
hirondelle.date4j.DateTime now = hirondelle.date4j.DateTime.now(TimeZone.getDefault());
Expand Down