Java OffsetDateTime withDayOfMonth()用法及代码示例

Java中OffsetDateTime类的withDayOfMonth()方法返回此OffsetDateTime的副本，其中day-of-month如参数中所述进行了更改。

用法:

public OffsetDateTime withDayOfMonth(int dayOfMonth)

参数：此方法接受单个参数dayOfMonth，该参数指定要在结果中设置的day-of-month，范围为1到28-31。

返回值：它基于带有请求的日期的该日期返回OffsetDateTime，而不是null。

异常：当day-of-month值无效或该特定年份的月份的day-of-month无效时，程序将引发DateTimeException。

以下示例程序旨在说明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)); 
    } 
}

输出：

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); 
        } 
    } 
}

输出：

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

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

相关用法

注：本文由纯净天空筛选整理自gopaldave大神的英文原创作品 OffsetDateTime withDayOfMonth() method in Java with examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。