Java OffsetDateTime withDayOfMonth()用法及代碼示例

Java中OffsetDateTime類的withDayOfMonth()方法返回此OffsetDateTime的副本，其中day-of-month如參數中所述進行了更改。

用法:

public OffsetDateTime withDayOfMonth(int dayOfMonth)

參數：此方法接受單個參數dayOfMonth，該參數指定要在結果中設置的day-of-month，範圍為1到28-31。

返回值：它基於帶有請求的日期的該日期返回OffsetDateTime，而不是null。

異常：當day-of-month值無效或該特定年份的月份的day-of-month無效時，程序將引發DateTimeException。

以下示例程序旨在說明withDayOfMonth()方法：

示例1:

// Java program to demonstrate the withDayOfMonth() method 
  
import java.time.OffsetDateTime; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Parses the date1 
        OffsetDateTime date1 
            = OffsetDateTime 
                  .parse( 
                      "2018-12-12T13:30:30+05:00"); 
  
        // Prints dates 
        System.out.println("Date1: " + date1); 
  
        // Changes the day of month 
        System.out.println("Date1 after altering day-of-month: "
                           + date1.withDayOfMonth(20)); 
    } 
}

輸出：

Date1: 2018-12-12T13:30:30+05:00
Date1 after altering day-of-month: 2018-12-20T13:30:30+05:00

程序2：

// Java program to demonstrate the withDayOfMonth() method 
  
import java.time.OffsetDateTime; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        try { 
            // Parses the date1 
            OffsetDateTime date1 
                = OffsetDateTime 
                      .parse( 
                          "2018-12-12T13:30:30+05:00"); 
  
            // Prints dates 
            System.out.println("Date1: " + date1); 
  
            // Changes the day of month 
            System.out.println("Date1 after altering day-of-month: "
                               + date1.withDayOfMonth(32)); 
        } 
        catch (Exception e) { 
            System.out.println("Exception: " + e); 
        } 
    } 
}

輸出：

Date1: 2018-12-12T13:30:30+05:00
Exception: java.time.DateTimeException:
           Invalid value for DayOfMonth (valid values 1 - 28/31): 32

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

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注：本文由純淨天空篩選整理自gopaldave大神的英文原創作品 OffsetDateTime 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。