Java ZonedDateTime withDayOfYear()用法及代碼示例

ZonedDateTime類的withDayOfYear()方法用於更改此ZonedDateTime中的day-of-year，並在此操作後返回ZonedDateTime的副本。此方法在本地時間線上操作，更改本地日期時間的day-of-year，並在此操作後更改本地日期時間使用區域ID獲取偏移量，將其轉換回ZonedDateTime。當轉換回ZonedDateTime時，如果本地日期時間重疊，則將盡可能保留偏移量，否則將使用較早的偏移量。此實例是不可變的，不受此方法調用的影響。

用法:

public ZonedDateTime withDayOfYear(int dayOfYear)

參數：此方法接受單個參數dayOfYear，該參數表示要在結果中設置的day-of-year，範圍為1至365-366。

返回值：此方法基於此日期時間和所請求的日期返回ZonedDateTime。

異常：如果day-of-year值無效，或者day-of-year對於year-year無效，則此方法引發DateTimeException。

以下示例程序旨在說明withDayOfYear()方法：
示例1:

// Java program to demonstrate 
// ZonedDateTime.withDayOfYear() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ZonedDateTime object 
        ZonedDateTime zoneddatetime 
            = ZonedDateTime.parse( 
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]"); 
  
        // print instance 
        System.out.println("ZonedDateTime before"
                           + " alter dayOfYear: "
                           + zoneddatetime); 
  
        // alter dayOfYear to 200th day 
        ZonedDateTime returnvalue 
            = zoneddatetime.withDayOfYear(200); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + "alter dayOfYear: "
                           + returnvalue); 
    } 
}

輸出：

ZonedDateTime before alter dayOfYear: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after alter dayOfYear: 2018-07-19T19:21:12.123+05:30[Asia/Calcutta]

示例2:

// Java program to demonstrate 
// ZonedDateTime.withDayOfYear() method 
  
import java.time.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a ZonedDateTime object 
        ZonedDateTime zoneddatetime 
            = ZonedDateTime.parse( 
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]"); 
  
        // print instance 
        System.out.println("ZonedDateTime before"
                           + " alter dayOfYear: "
                           + zoneddatetime); 
  
        // alter dayOfYear to 365 
        ZonedDateTime returnvalue 
            = zoneddatetime.withDayOfYear(365); 
  
        // print result 
        System.out.println("ZonedDateTime after "
                           + "alter dayOfYear: "
                           + returnvalue); 
    } 
}

輸出：

ZonedDateTime before alter dayOfYear: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after alter dayOfYear: 2018-12-31T23:12:31.123+01:00[Europe/Paris]

參考： https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#withDayOfYear(int)

相關用法

注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 ZonedDateTime withDayOfYear() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。