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Simple clean of difference between dates

This commit is contained in:
Dassi Orleando 2017-08-25 09:46:35 +01:00
parent 348ff5d403
commit a663b3ccde
6 changed files with 92 additions and 44 deletions
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3
core-java/README.md
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@ -141,3 +141,6 @@
- [Guide to UUID in Java](http://www.baeldung.com/java-uuid)
- [How to Get the Last Element of a Stream in Java?](http://www.baeldung.com/java-stream-last-element)
- [Guide to Escaping Characters in Java RegExps](http://www.baeldung.com/java-regexp-escape-char)
- [Period and Duration in Java](http://www.baeldung.com/java-period-duration)
- [Introduction to the Java 8 Date/Time API](http://www.baeldung.com/java-8-date-time-intro)
- [Migrating to the New Java 8 Date Time API](http://www.baeldung.com/migrating-to-java-8-date-time-api)

14
core-java/pom.xml
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@ -186,6 +186,16 @@
<artifactId>fscontext</artifactId>
<version>${fscontext.version}</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<dependency>
<groupId>com.darwinsys</groupId>
<artifactId>hirondelle-date4j</artifactId>
<version>${hirondelle-date4j.version}</version>
</dependency>
</dependencies>
<build>
@ -408,6 +418,8 @@
<grep4j.version>1.8.7</grep4j.version>
<lombok.version>1.16.12</lombok.version>
<fscontext.version>4.6-b01</fscontext.version>
<joda-time.version>2.9.9</joda-time.version>
<hirondelle-date4j.version>1.5.1</hirondelle-date4j.version>
<!-- testing -->
<org.hamcrest.version>1.3</org.hamcrest.version>
@ -416,9 +428,9 @@
<assertj.version>3.6.1</assertj.version>
<avaitility.version>1.7.0</avaitility.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.6.0</maven-compiler-plugin.version>
<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
</properties>
</project>

63
core-java/src/test/java/com/baeldung/DateDiffUnitTest.java Normal file
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@ -0,0 +1,63 @@
package com.baeldung;
import org.joda.time.DateTime;
import org.junit.Test;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Duration;
import java.time.ZonedDateTime;
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() {
ZonedDateTime now = ZonedDateTime.now();
ZonedDateTime sixDaysBehind = now.minusDays(6);
Duration duration = Duration.between(now, sixDaysBehind);
long diff = Math.abs(duration.toDays());
assertEquals(diff, 6);
}
@Test
public void givenTwoDatesInJodaTime_whenDifferentiating_thenWeGetSix() {
DateTime now = DateTime.now();
DateTime sixDaysBehind = now.minusDays(6);
org.joda.time.Duration duration = new org.joda.time.Duration(now, sixDaysBehind);
long diff = Math.abs(duration.getStandardDays());
assertEquals(diff, 6);
}
@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);
}
}

30
java-difference-date/src/main/java/com/baeldung/DateDiff.java
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@ -1,30 +0,0 @@
package com.baeldung;
import org.joda.time.DateTime;
import java.time.Duration;
import java.time.ZonedDateTime;
import java.util.Date;
import java.util.concurrent.TimeUnit;
public class DateDiff {
public long beforeJava8diff(Date firstDate, Date secondDate){
long diffInMillies = Math.abs(secondDate.getTime() - firstDate.getTime());
return TimeUnit.DAYS.convert(diffInMillies, TimeUnit.MILLISECONDS);
}
public long fromJava8Diff(ZonedDateTime firstDate, ZonedDateTime secondDate){
Duration duration = Duration.between(firstDate, secondDate);
return Math.abs(duration.toDays());
}
public long fromJodaTime(DateTime firstDate, DateTime secondDate){
org.joda.time.Duration duration = new org.joda.time.Duration(firstDate, secondDate);
return Math.abs(duration.getStandardDays());
}
public long fromDate4j(hirondelle.date4j.DateTime firstDate, hirondelle.date4j.DateTime secondDate){
long diff = firstDate.numDaysFrom(secondDate);
return Math.abs(diff);
}
}

25
java-difference-date/src/test/java/com/baeldung/DateDiffTest.java
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@ -5,55 +5,56 @@ import org.junit.Test;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.Duration;
import java.time.ZonedDateTime;
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 DateDiffTest {
@Test
public void givenTwoDatesBeforeJava8SeparatedBySixDays_whenCallingDiffOnThem_thenWeGetSix() throws ParseException {
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");
DateDiff dateDiff = new DateDiff();
long diff = dateDiff.beforeJava8diff(firstDate, secondDate);
long diffInMillies = Math.abs(secondDate.getTime() - firstDate.getTime());
long diff = TimeUnit.DAYS.convert(diffInMillies, TimeUnit.MILLISECONDS);
assertEquals(diff, 6);
}
@Test
public void givenTheCurrentDateAndSixDaysBehindInJava8_whenCallingDiffOnThem_thenWeGetSix() {
public void givenTwoDatesInJava8_whenDifferentiating_thenWeGetSix() {
ZonedDateTime now = ZonedDateTime.now();
ZonedDateTime sixDaysBehind = now.minusDays(6);
DateDiff dateDiff = new DateDiff();
long diff = dateDiff.fromJava8Diff(now, sixDaysBehind);
Duration duration = Duration.between(now, sixDaysBehind);
long diff = Math.abs(duration.toDays());
assertEquals(diff, 6);
}
@Test
public void givenTheCurrentDateAndSixDaysBehindInJodaTime_whenCallingDiffOnThem_thenWeGetSix() {
public void givenTwoDatesInJodaTime_whenDifferentiating_thenWeGetSix() {
DateTime now = DateTime.now();
DateTime sixDaysBehind = now.minusDays(6);
DateDiff dateDiff = new DateDiff();
long diff = dateDiff.fromJodaTime(now, sixDaysBehind);
org.joda.time.Duration duration = new org.joda.time.Duration(now, sixDaysBehind);
long diff = Math.abs(duration.getStandardDays());
assertEquals(diff, 6);
}
@Test
public void givenTheCurrentDateAndSixDaysBehindInDate4j_whenCallingDiffOnThem_thenWeGetSix() {
public void givenTwoDatesInDate4j_whenDifferentiating_thenWeGetSix() {
hirondelle.date4j.DateTime now = hirondelle.date4j.DateTime.now(TimeZone.getDefault());
hirondelle.date4j.DateTime sixDaysBehind = now.minusDays(6);
DateDiff dateDiff = new DateDiff();
long diff = dateDiff.fromDate4j(now, sixDaysBehind);
long diff = Math.abs(now.numDaysFrom(sixDaysBehind));
assertEquals(diff, 6);
}

1
pom.xml
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@ -76,7 +76,6 @@
<module>immutables</module>
<module>jackson</module>
<module>java-difference-date</module>
<!-- <module>java-cassandra</module> -->
<module>vavr</module>
<module>javax-servlets</module>