BAEL-1892 Get Integer Values from Date

-Added classes to show case how to extract values from classes Date and Calendar, and LocalDate, LocalDateTime, ZonedDateTime and OffSetDateTime
-Added unit test cases for all classes

core-java/src/main/java/com/baeldung/datetime/DateExtractYearMonthDayIntegerValues.java

@@ -0,0 +1,28 @@
+package com.baeldung.datetime;
+
+import java.util.Calendar;
+import java.util.Date;
+
+public class DateExtractYearMonthDayIntegerValues {
+
+    int getYear(Date date) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+
+        return calendar.get(Calendar.YEAR);
+    }
+
+    int getMonth(Date date) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+
+        return calendar.get(Calendar.MONTH);
+    }
+
+    int getDay(Date date) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(date);
+
+        return calendar.get(Calendar.DAY_OF_MONTH);
+    }
+}

core-java/src/main/java/com/baeldung/datetime/LocalDateExtractYearMonthDayIntegerValues.java

@@ -0,0 +1,18 @@
+package com.baeldung.datetime;
+
+import java.time.LocalDate;
+
+public class LocalDateExtractYearMonthDayIntegerValues {
+
+    int getYear(LocalDate localDate) {
+        return localDate.getYear();
+    }
+
+    int getMonth(LocalDate localDate) {
+        return localDate.getMonthValue();
+    }
+
+    int getDay(LocalDate localDate) {
+        return localDate.getDayOfMonth();
+    }
+}

core-java/src/main/java/com/baeldung/datetime/LocalDateTimeExtractYearMonthDayIntegerValues.java

@@ -0,0 +1,18 @@
+package com.baeldung.datetime;
+
+import java.time.LocalDateTime;
+
+public class LocalDateTimeExtractYearMonthDayIntegerValues {
+
+    int getYear(LocalDateTime localDateTime) {
+        return localDateTime.getYear();
+    }
+
+    int getMonth(LocalDateTime localDateTime) {
+        return localDateTime.getMonthValue();
+    }
+
+    int getDay(LocalDateTime localDateTime) {
+        return localDateTime.getDayOfMonth();
+    }
+}

core-java/src/main/java/com/baeldung/datetime/OffsetDateTimeExtractYearMonthDayIntegerValues.java

@@ -0,0 +1,18 @@
+package com.baeldung.datetime;
+
+import java.time.OffsetDateTime;
+
+public class OffsetDateTimeExtractYearMonthDayIntegerValues {
+
+    int getYear(OffsetDateTime offsetDateTime) {
+        return offsetDateTime.getYear();
+    }
+
+    int getMonth(OffsetDateTime offsetDateTime) {
+        return offsetDateTime.getMonthValue();
+    }
+
+    int getDay(OffsetDateTime offsetDateTime) {
+        return offsetDateTime.getDayOfMonth();
+    }
+}

core-java/src/main/java/com/baeldung/datetime/ZonedDateTimeExtractYearMonthDayIntegerValues.java

@@ -0,0 +1,18 @@
+package com.baeldung.datetime;
+
+import java.time.ZonedDateTime;
+
+public class ZonedDateTimeExtractYearMonthDayIntegerValues {
+
+    int getYear(ZonedDateTime zonedDateTime) {
+        return zonedDateTime.getYear();
+    }
+
+    int getMonth(ZonedDateTime zonedDateTime) {
+        return zonedDateTime.getMonthValue();
+    }
+
+    int getDay(ZonedDateTime zonedDateTime) {
+        return zonedDateTime.getDayOfMonth();
+    }
+}