LocalDateTime類getDayOfYear()方法 (LocalDateTime Class getDayOfYear() method)

• getDayOfYear() method is available in java.time package.

  getDayOfYear()方法在java.time包中可用。

• getDayOfYear() method is used to get the field value day-of-year from this date-time object.

  getDayOfYear()方法用于從該日期時間對象獲取年月日的字段值。

• getDayOfYear() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  getDayOfYear()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

• getDayOfYear() method does not throw an exception at the time of getting the day of the year.

  getDayOfYear()方法在獲取一年中的某天時不會引發異常。

Syntax:

句法：

public int getDayOfYear();

Parameter(s):

參數：

• None

  沒有

Return value:

返回值：

The return type of this method is int, it returns the value day-of-year field and the number of days in a year starts from 1 to 365 (i.e. for Non-Leap Year) or from 1 to 366 (i.e. for Leap Year).

此方法的返回類型為int ，它返回值“年的年”字段，并且一年中的天數從1到365(即非-年)或1到366(即Le年)開始)。

Example:

例：

// Java program to demonstrate the example // of getDayOfYear() method of LocalDateTimeimport java.time.*;public class GetDayOfWeekOfLocalDateTime {public static void main(String args[]) {// Instantiates two LocalDateTimeLocalDateTime da_ti1 = LocalDateTime.parse("2005-10-05T10:10:10");LocalDateTime da_ti2 = LocalDateTime.now();// Display da_ti1, da_ti2System.out.println("LocalDateTime da_ti1 and da_ti2: ");System.out.println("da_ti1: " + da_ti1);System.out.println("da_ti2: " + da_ti2);System.out.println();// Here, this method returns the field value// day-of-week that is an enum DayOfWeek// from this date-time object (da_ti1)DayOfWeek dow = da_ti1.getDayOfWeek();// Display dowSystem.out.println("da_ti1.getDayOfWeek(): " + dow);// Here, this method returns the field value// day-of-week that is an enum DayOfWeek// from this date-time object (da_ti2)dow = da_ti2.getDayOfWeek();// Display dowSystem.out.println("da_ti2.getDayOfWeek(): " + dow);} }

Output

輸出量

LocalDateTime da_ti1 and da_ti2: da_ti1: 2005-10-05T10:10:10 da_ti2: 2020-06-05T02:47:28.362477da_ti1.getDayOfWeek(): WEDNESDAY da_ti2.getDayOfWeek(): FRIDAY

翻譯自: https://www.includehelp.com/java/localdatetime-getdayofyear-method-with-example.aspx

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