Java ZonedDateTime withDayOfMonth()用法及代码示例

ZonedDateTime类的withDayOfMonth()方法用于更改此ZonedDateTime中的day-of-month，并在此操作后返回ZonedDateTime的副本。此方法在本地时间线上操作，更改本地日期时间的day-of-month，并在此操作后更改本地日期时间使用区域ID获取偏移量，将其转换回ZonedDateTime。当转换回ZonedDateTime时，如果本地日期时间重叠，则将尽可能保留偏移量，否则将使用较早的偏移量。此实例是不可变的，不受此方法调用的影响。

用法:

public ZonedDateTime withDayOfMonth(int dayOfMonth)

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

返回值：此方法基于此日期时间和所请求的日期返回ZonedDateTime。

异常：如果day-of-month值无效，或者day-of-month对于month-year无效，则此方法引发DateTimeException。

以下示例程序旨在说明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); 
    } 
}

输出：

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); 
    } 
}

输出：

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]

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

相关用法

注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 ZonedDateTime 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。