BAEL-3401

- Implementation for adding days skipping weekends in LocalDate object in Java 8

core-java-modules/core-java-date-operations/src/main/java/com/baeldung/datetime/AddSubtractDaysSkippingWeekendsUtils.java

@@ -0,0 +1,21 @@
+package com.baeldung.datetime;
+
+import java.time.DayOfWeek;
+import java.time.LocalDate;
+
+public class AddSubtractDaysSkippingWeekendsUtils {
+
+    public static LocalDate addSubtractDaysSkippingWeekendsIterativeMethod(LocalDate date, int days) {
+        LocalDate result = date;
+        int addedDays = 0;
+        int absDays = Math.abs(days);
+        int day = (days > 0) ? 1 : -1;
+        while (addedDays < absDays) {
+            result = result.plusDays(day);
+            if (!(result.getDayOfWeek() == DayOfWeek.SATURDAY || result.getDayOfWeek() == DayOfWeek.SUNDAY)) {
+                ++addedDays;
+            }
+        }
+        return result;
+    }
+}

core-java-modules/core-java-date-operations/src/test/java/com/baeldung/datetime/AddSubtractDaysSkippingWeekendsUtilsUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.datetime;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import java.time.LocalDate;
+
+public class AddSubtractDaysSkippingWeekendsUtilsUnitTest {
+
+    @Test
+    public void givenLocalDateAndDaysToAdd_thenAddDaysSkippingWeekendsUsingIterativeMethod() {
+        LocalDate initialDate = LocalDate.of(2019, 11, 7);
+        LocalDate expectedDate = LocalDate.of(2019, 11, 13);
+        LocalDate result = AddSubtractDaysSkippingWeekendsUtils.addSubtractDaysSkippingWeekendsIterativeMethod(initialDate, 4);
+        assertEquals(expectedDate, result);
+    }
+
+    @Test
+    public void givenLocalDateAndDaysToAdd_thenSubtractDaysSkippingWeekendsUsingIterativeMethod() {
+        LocalDate initialDate = LocalDate.of(2019, 11, 7);
+        LocalDate expectedDate = LocalDate.of(2019, 11, 1);
+        LocalDate result = AddSubtractDaysSkippingWeekendsUtils.addSubtractDaysSkippingWeekendsIterativeMethod(initialDate, -4);
+        assertEquals(expectedDate, result);
+    }
+
+}