From 33f52b2e0bf44f70b1ecb114911a214925e9590a Mon Sep 17 00:00:00 2001 From: MohamedHelmyKassab <137485958+MohamedHelmyKassab@users.noreply.github.com> Date: Wed, 1 Nov 2023 20:54:40 +0200 Subject: [PATCH] This PR is related to the article BAEL-7130 (#15109) * This commit related to the article BAEL-7130 This commit aims to add a RoundDate class with several methods to round the date. * This commit related to the article BAEL-7130 This commit aims to add a test class DateRoundingUnitTest. --- .../com/baeldung/rounddate/RoundDate.java | 113 ++++++++++++++++++ .../rounddate/DateRoundingUnitTest.java | 63 ++++++++++ 2 files changed, 176 insertions(+) create mode 100644 core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/rounddate/RoundDate.java create mode 100644 core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/rounddate/DateRoundingUnitTest.java diff --git a/core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/rounddate/RoundDate.java b/core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/rounddate/RoundDate.java new file mode 100644 index 0000000000..6fb7cf87b7 --- /dev/null +++ b/core-java-modules/core-java-8-datetime-2/src/main/java/com/baeldung/rounddate/RoundDate.java @@ -0,0 +1,113 @@ +package com.baeldung.rounddate; + +import java.time.DayOfWeek; +import java.time.temporal.ChronoField; +import java.time.temporal.TemporalAdjusters; +import java.util.Calendar; +import java.util.Date; +import java.time.LocalDateTime; +import java.time.ZonedDateTime; + +public class RoundDate { + public static Date getDate(int year, int month, int day, int hour, int minute) { + Calendar calendar = Calendar.getInstance(); + calendar.set(Calendar.YEAR, year); + calendar.set(Calendar.MONTH, month); + calendar.set(Calendar.DAY_OF_MONTH, day); + calendar.set(Calendar.HOUR_OF_DAY, hour); + calendar.set(Calendar.MINUTE, minute); + calendar.set(Calendar.SECOND, 0); + calendar.set(Calendar.MILLISECOND, 0); + + return calendar.getTime(); + } + + public static Date roundToDay(Date date) { + Calendar calendar = Calendar.getInstance(); + calendar.setTime(date); + calendar.set(Calendar.HOUR_OF_DAY, 0); + calendar.set(Calendar.MINUTE, 0); + calendar.set(Calendar.SECOND, 0); + calendar.set(Calendar.MILLISECOND, 0); + return calendar.getTime(); + } + + public static Date roundToNearestUnit(Date date, int unit) { + Calendar calendar = Calendar.getInstance(); + calendar.setTime(date); + + switch (unit) { + case Calendar.HOUR: + int minute = calendar.get(Calendar.MINUTE); + if (minute >= 0 && minute < 15) { + calendar.set(Calendar.MINUTE, 0); + } else if (minute >= 15 && minute < 45) { + calendar.set(Calendar.MINUTE, 30); + } else { + calendar.set(Calendar.MINUTE, 0); + calendar.add(Calendar.HOUR_OF_DAY, 1); + } + calendar.set(Calendar.SECOND, 0); + calendar.set(Calendar.MILLISECOND, 0); + break; + + case Calendar.DAY_OF_MONTH: + int hour = calendar.get(Calendar.HOUR_OF_DAY); + if (hour >= 12) { + calendar.add(Calendar.DAY_OF_MONTH, 1); + } + calendar.set(Calendar.HOUR_OF_DAY, 0); + calendar.set(Calendar.MINUTE, 0); + calendar.set(Calendar.SECOND, 0); + calendar.set(Calendar.MILLISECOND, 0); + break; + + case Calendar.MONTH: + int day = calendar.get(Calendar.DAY_OF_MONTH); + if (day >= 15) { + calendar.add(Calendar.MONTH, 1); + } + calendar.set(Calendar.DAY_OF_MONTH, 1); + calendar.set(Calendar.HOUR_OF_DAY, 0); + calendar.set(Calendar.MINUTE, 0); + calendar.set(Calendar.SECOND, 0); + calendar.set(Calendar.MILLISECOND, 0); + break; + } + + return calendar.getTime(); + } + + public static LocalDateTime roundToStartOfMonthUsingLocalDateTime(LocalDateTime dateTime) { + return dateTime.withDayOfMonth(1).withHour(0).withMinute(0).withSecond(0).withNano(0); + } + + public static LocalDateTime roundToEndOfWeekUsingLocalDateTime(LocalDateTime dateTime) { + return dateTime.with(TemporalAdjusters.next(DayOfWeek.SATURDAY)) + .withHour(23) + .withMinute(59) + .withSecond(59) + .withNano(999); + } + + public static ZonedDateTime roundToStartOfMonthUsingZonedDateTime(ZonedDateTime dateTime) { + return dateTime.withDayOfMonth(1) + .withHour(0) + .withMinute(0) + .withSecond(0) + .with(ChronoField.MILLI_OF_SECOND, 0) + .with(ChronoField.MICRO_OF_SECOND, 0) + .with(ChronoField.NANO_OF_SECOND, 0); + } + + public static ZonedDateTime roundToEndOfWeekUsingZonedDateTime(ZonedDateTime dateTime) { + return dateTime.with(TemporalAdjusters.next(DayOfWeek.SATURDAY)) + .withHour(23) + .withMinute(59) + .withSecond(59) + .with(ChronoField.MILLI_OF_SECOND, 999) + .with(ChronoField.MICRO_OF_SECOND, 999) + .with(ChronoField.NANO_OF_SECOND, 999); + } + +} \ No newline at end of file diff --git a/core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/rounddate/DateRoundingUnitTest.java b/core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/rounddate/DateRoundingUnitTest.java new file mode 100644 index 0000000000..bbe49d8340 --- /dev/null +++ b/core-java-modules/core-java-8-datetime-2/src/test/java/com/baeldung/rounddate/DateRoundingUnitTest.java @@ -0,0 +1,63 @@ +package com.baeldung.rounddate; + +import org.junit.Test; + +import java.time.LocalDateTime; +import java.time.ZoneId; +import java.time.ZonedDateTime; +import java.util.Calendar; +import java.util.Date; + +import static org.junit.Assert.assertEquals; + +public class DateRoundingUnitTest { + + @Test + public void givenDate_whenRoundToDay_thenBeginningOfDay() { + Date date = RoundDate.getDate(2023, Calendar.JANUARY, 27, 14, 30); + Date result = RoundDate.roundToDay(date); + assertEquals(RoundDate.getDate(2023, Calendar.JANUARY, 27, 0, 0), result); + } + + @Test + public void givenDate_whenRoundToNearestUnit_thenNearestUnit() { + Date date = RoundDate.getDate(2023, Calendar.JANUARY, 27, 14, 12); + Date result = RoundDate.roundToNearestUnit(date, Calendar.DAY_OF_MONTH); + Date expected = RoundDate.getDate(2023, Calendar.JANUARY, 28, 0, 0); + assertEquals(expected, result); + } + + @Test + public void givenLocalDateTime_whenRoundToStartOfMonth_thenStartOfMonth() { + LocalDateTime dateTime = LocalDateTime.of(2023, 1, 27, 14, 12); + LocalDateTime result = RoundDate.roundToStartOfMonthUsingLocalDateTime(dateTime); + LocalDateTime expected = LocalDateTime.of(2023, 1, 1, 0, 0, 0); + assertEquals(expected, result); + } + + + @Test + public void givenZonedDateTime_whenRoundToStartOfMonth_thenStartOfMonth() { + ZonedDateTime dateTime = ZonedDateTime.of(2023, 1, 27, 14, 12, 0, 0, ZoneId.systemDefault()); + ZonedDateTime result = RoundDate.roundToStartOfMonthUsingZonedDateTime(dateTime); + ZonedDateTime expected = ZonedDateTime.of(2023, 1, 1, 0, 0, 0, 0, ZoneId.systemDefault()); + assertEquals(expected, result); + } + + @Test + public void givenLocalDateTime_whenRoundToEndOfWeek_thenEndOfWeek() { + LocalDateTime dateTime = LocalDateTime.of(2023, 1, 27, 14, 12); + LocalDateTime result = RoundDate.roundToEndOfWeekUsingLocalDateTime(dateTime); + LocalDateTime expected = LocalDateTime.of(2023, 1, 28, 23, 59, 59, 999); + assertEquals(expected, result); + } + + @Test + public void givenZonedDateTime_whenRoundToEndOfWeek_thenEndOfWeek() { + ZonedDateTime dateTime = ZonedDateTime.of(2023, 1, 27, 14, 12, 0, 0, ZoneId.systemDefault()); + ZonedDateTime result = RoundDate.roundToEndOfWeekUsingZonedDateTime(dateTime); + ZonedDateTime expected = ZonedDateTime.of(2023, 1, 28, 23, 59, 59, 999, ZoneId.systemDefault()); + assertEquals(expected, result); + } + +}