BAEL-1344 add java9 example

core-java-8/src/main/java/com/baeldung/datetime/DateToLocalDateConverter.java

@@ -27,8 +27,9 @@ public class DateToLocalDateConverter {
     }
 
     public static LocalDate convertToLocalDateViaMilisecond(Date dateToConvert) {
-        return LocalDate.from(Instant.ofEpochMilli(dateToConvert.getTime())
+        return Instant.ofEpochMilli(dateToConvert.getTime())
-            .atZone(ZoneId.systemDefault()));
+            .atZone(ZoneId.systemDefault())
+            .toLocalDate();
     }
 
 }

core-java-8/src/main/java/com/baeldung/datetime/DateToLocalDateTimeConverter.java

@@ -27,8 +27,9 @@ public class DateToLocalDateTimeConverter {
     }
 
     public static LocalDateTime convertToLocalDateTimeViaMilisecond(Date dateToConvert) {
-        return LocalDateTime.from(Instant.ofEpochMilli(dateToConvert.getTime())
+        return Instant.ofEpochMilli(dateToConvert.getTime())
-            .atZone(ZoneId.systemDefault()));
+            .atZone(ZoneId.systemDefault())
+            .toLocalDateTime();
     }
 
 }

core-java-9/src/main/java/com/baeldung/java9/datetime/DateToLocalDateConverter.java

@@ -0,0 +1,22 @@
+/**
+ * 
+ */
+package com.baeldung.java9.datetime;
+
+import java.time.LocalDate;
+import java.time.ZoneId;
+import java.util.Date;
+
+/**
+ * Class which shows a way to convert java.util.Date into java.time.LocalDate with new Java 1.9.
+ * 
+ * @author abialas
+ *
+ */
+public class DateToLocalDateConverter {
+
+    public static LocalDate convertToLocalDate(Date dateToConvert) {
+        return LocalDate.ofInstant(dateToConvert.toInstant(), ZoneId.systemDefault());
+    }
+
+}

core-java-9/src/main/java/com/baeldung/java9/datetime/DateToLocalDateTimeConverter.java

@@ -0,0 +1,22 @@
+/**
+ * 
+ */
+package com.baeldung.java9.datetime;
+
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.Date;
+
+/**
+ * Class which shows a way to convert java.util.Date into java.time.LocalDateTime with new Java 1.9.
+ * 
+ * @author abialas
+ *
+ */
+public class DateToLocalDateTimeConverter {
+
+    public static LocalDateTime convertToLocalDateTime(Date dateToConvert) {
+        return LocalDateTime.ofInstant(dateToConvert.toInstant(), ZoneId.systemDefault());
+    }
+
+}

core-java-9/src/test/java/com/baeldung/java9/datetime/DateToLocalDateConverterTest.java

@@ -0,0 +1,41 @@
+/**
+ * 
+ */
+package com.baeldung.java9.datetime;
+
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDate;
+import java.time.temporal.ChronoField;
+import java.util.Calendar;
+import java.util.Date;
+
+import org.junit.Test;
+
+import com.baeldung.java9.datetime.DateToLocalDateConverter;
+
+/**
+ * JUnits for {@link DateToLocalDateConverter} class.
+ * 
+ * @author abialas
+ *
+ */
+public class DateToLocalDateConverterTest {
+
+    @Test
+    public void shouldReturn10thNovember2010WhenConvertToLocalDate() {
+        // given
+        Calendar calendar = Calendar.getInstance();
+        calendar.set(2010, 10, 10);
+        Date dateToConvert = calendar.getTime();
+
+        // when
+        LocalDate localDateTime = DateToLocalDateConverter.convertToLocalDate(dateToConvert);
+
+        // then
+        assertEquals(2010, localDateTime.get(ChronoField.YEAR));
+        assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
+        assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
+    }
+
+}

core-java-9/src/test/java/com/baeldung/java9/datetime/DateToLocalDateTimeConverterTest.java

@@ -0,0 +1,43 @@
+/**
+ * 
+ */
+package com.baeldung.java9.datetime;
+
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDateTime;
+import java.time.temporal.ChronoField;
+import java.util.Calendar;
+import java.util.Date;
+
+import org.junit.Test;
+
+import com.baeldung.java9.datetime.DateToLocalDateTimeConverter;
+
+/**
+ * JUnits for {@link DateToLocalDateTimeConverter} class.
+ * 
+ * @author abialas
+ *
+ */
+public class DateToLocalDateTimeConverterTest {
+
+    @Test
+    public void shouldReturn10thNovember2010time8hour20minWhenConvertViaInstant() {
+        // given
+        Calendar calendar = Calendar.getInstance();
+        calendar.set(2010, 10, 10, 8, 20);
+        Date dateToConvert = calendar.getTime();
+
+        // when
+        LocalDateTime localDateTime = DateToLocalDateTimeConverter.convertToLocalDateTime(dateToConvert);
+
+        // then
+        assertEquals(2010, localDateTime.get(ChronoField.YEAR));
+        assertEquals(11, localDateTime.get(ChronoField.MONTH_OF_YEAR));
+        assertEquals(10, localDateTime.get(ChronoField.DAY_OF_MONTH));
+        assertEquals(8, localDateTime.get(ChronoField.HOUR_OF_DAY));
+        assertEquals(20, localDateTime.get(ChronoField.MINUTE_OF_HOUR));
+    }
+
+}