ZonedDateTime類的withDayOfMonth()方法用於更改此ZonedDateTime中的day-of-month,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-month,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 withDayOfMonth(int dayOfMonth)
參數:此方法接受單個參數dayOfMonth,該參數表示要在結果中設置的day-of-month,範圍為1到28-31。
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-month值無效,或者day-of-month對於month-year無效,則此方法引發DateTimeException。
以下示例程序旨在說明withDayOfMonth()方法:
示例1:
// Java program to demonstrate
// ZonedDateTime.withDayOfMonth() 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 dayOfMonth: "
+ zoneddatetime);
// alter dayOfMonth to 5th
ZonedDateTime returnvalue
= zoneddatetime.withDayOfMonth(5);
// print result
System.out.println("ZonedDateTime after "
+ "alter dayOfMonth: "
+ returnvalue);
}
}
ZonedDateTime before alter dayOfMonth: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after alter dayOfMonth: 2018-12-05T19:21:12.123+05:30[Asia/Calcutta]
示例2:
// Java program to demonstrate
// ZonedDateTime.withDayOfMonth() 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 dayOfMonth: "
+ zoneddatetime);
// alter dayOfMonth to 20
ZonedDateTime returnvalue
= zoneddatetime.withDayOfMonth(20);
// print result
System.out.println("ZonedDateTime after "
+ "alter dayOfMonth: "
+ returnvalue);
}
}
ZonedDateTime before alter dayOfMonth: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after alter dayOfMonth: 2018-10-20T23:12:31.123+02:00[Europe/Paris]
參考: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#withDayOfMonth(int)
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注:本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 ZonedDateTime withDayOfMonth() 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。