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מחלקה Java LocalDateTime היא אובייקט תאריך-זמן בלתי ניתן לשינוי המייצג תאריך-שעה, עם פורמט ברירת המחדל של yyyy-MM-dd-HH-mm-ss.zzz. הוא יורש מחלקת אובייקטים ומיישם את ממשק ChronoLocalDateTime.

הצהרת מחלקה של Java LocalDateTime

בוא נראה את ההצהרה של המחלקה java.time.LocalDateTime.

string.format

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

שיטות של Java LocalDateTime

דוגמה ל-Java 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); } } 

תְפוּקָה:

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

Java LocalDateTime לדוגמה: now()

 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); } } 

תְפוּקָה:

 14-01-2017 11:42:32 

Java LocalDateTime לדוגמה: 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)); } } 

תְפוּקָה:

 1 44 13 15 956 

Java LocalDateTime דוגמה: 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 ); } } 

תְפוּקָה:

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

Java LocalDateTime דוגמה: 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 ); } } 

תְפוּקָה:

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