فئة Java LocalDateTime هي كائن وقت وتاريخ غير قابل للتغيير يمثل تاريخًا ووقتًا، بالتنسيق الافتراضي مثل yyyy-MM-dd-HH-mm-ss.zzz. إنه يرث فئة الكائن وينفذ واجهة ChronoLocalDateTime.

إعلان فئة Java LocalDateTime

دعونا نرى إعلان فئة java.time.LocalDateTime.

 public final class LocalDateTime extends Object implements Temporal, TemporalAdjuster, ChronoLocalDateTime, Serializable  

طرق جافا LocalDateTime

مثال جافا LocalDateTime

 import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class LocalDateTimeExample1 { public static void main(String[] args) { LocalDateTime now = LocalDateTime.now(); System.out.println('Before Formatting: ' + now); DateTimeFormatter format = DateTimeFormatter.ofPattern('dd-MM-yyyy HH:mm:ss'); String formatDateTime = now.format(format); System.out.println('After Formatting: ' + formatDateTime); } }  

انتاج:

 Before Formatting: 2017-01-13T17:09:42.411 After Formatting: 13-01-2017 17:09:42  

مثال Java LocalDateTime: الآن ()

 import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class LocalDateTimeExample2 { public static void main(String[] args) { LocalDateTime datetime1 = LocalDateTime.now(); DateTimeFormatter format = DateTimeFormatter.ofPattern('dd-MM-yyyy HH:mm:ss'); String formatDateTime = datetime1.format(format); System.out.println(formatDateTime); } }  

انتاج:

 14-01-2017 11:42:32  

مثال Java LocalDateTime: get()

 import java.time.LocalDateTime; import java.time.temporal.ChronoField; public class LocalDateTimeExample3 { public static void main(String[] args) { LocalDateTime a = LocalDateTime.of(2017, 2, 13, 15, 56); System.out.println(a.get(ChronoField.DAY_OF_WEEK)); System.out.println(a.get(ChronoField.DAY_OF_YEAR)); System.out.println(a.get(ChronoField.DAY_OF_MONTH)); System.out.println(a.get(ChronoField.HOUR_OF_DAY)); System.out.println(a.get(ChronoField.MINUTE_OF_DAY)); } }  

انتاج:

 1 44 13 15 956  

مثال Java LocalDateTime: minusDays()

 import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class LocalDateTimeExample4 { public static void main(String[] args) { LocalDateTime datetime1 = LocalDateTime.of(2017, 1, 14, 10, 34); LocalDateTime datetime2 = datetime1.minusDays(100); System.out.println('Before Formatting: ' + datetime2); DateTimeFormatter format = DateTimeFormatter.ofPattern('dd-MM-yyyy HH:mm'); String formatDateTime = datetime2.format(format); System.out.println('After Formatting: ' + formatDateTime ); } }  

انتاج:

 Before Formatting: 2016-10-06T10:34 After Formatting: 06-10-2016 10:34  

مثال Java LocalDateTime: plusDays()

 import java.time.LocalDateTime; import java.time.format.DateTimeFormatter; public class LocalDateTimeExample5 { public static void main(String[] args) { LocalDateTime datetime1 = LocalDateTime.of(2017, 1, 14, 10, 34); LocalDateTime datetime2 = datetime1.plusDays(120); System.out.println('Before Formatting: ' + datetime2); DateTimeFormatter format = DateTimeFormatter.ofPattern('dd-MM-yyyy HH:mm'); String formatDateTime = datetime2.format(format); System.out.println('After Formatting: ' + formatDateTime ); } }  

انتاج:

 Before Formatting: 2017-05-14T10:34 After Formatting: 14-05-2017 10:34