Java中的LocalDateTime类的withNano()方法用于获取此LocalDateTime的副本,并将纳秒更改为作为此方法的参数传递的纳秒。此LocalDateTime的其余值保持不变。
用法:
public LocalDateTime withNano(int nanoSeconds)
参数:此方法接受单个强制性参数nanoSeconds,该参数指定要在结果LocalDateTime实例中设置的纳秒。此纳秒的值的范围可以从0到999999999。
返回值:该函数返回LocalDateTime实例,该实例的纳秒更改为作为此方法的参数传递的纳秒。此LocalDateTime的其余值保持不变。
异常:如果纳秒值无效,该函数将引发DateTimeException。
以下示例程序旨在说明LocalDateTime.withNano()方法:
示例1:
// Program to illustrate the withNano() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Get the LocalDateTime instance
LocalDateTime dt = LocalDateTime.now();
// Get the String representation of this LocalDateTime
System.out.println("Original LocalDateTime: "
+ dt.toString());
// Get a new LocalDateTime with nano-seconds 0
System.out.println("New LocalDateTime: "
+ dt.withNano(0));
}
}
输出:
Original LocalDateTime: 2018-11-30T12:54:17.484 New LocalDateTime: 2018-11-30T12:54:17
示例2:
// Program to illustrate the withNano() method
import java.util.*;
import java.time.*;
public class GfG {
public static void main(String[] args)
{
// Get the LocalDateTime instance
LocalDateTime dt
= LocalDateTime
.parse("2015-04-06T10:15:30");
// Get the String representation of this LocalDateTime
System.out.println("Original LocalDateTime: "
+ dt.toString());
// Get a new LocalDateTime with nano-seconds 99999
System.out.println("New LocalDateTime: "
+ dt.withNano(99999));
}
}
输出:
Original LocalDateTime: 2015-04-06T10:15:30 New LocalDateTime: 2015-04-06T10:15:30.000099999
参考: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDateTime.html#withNano(int)
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注:本文由纯净天空筛选整理自gopaldave大神的英文原创作品 LocalDateTime withNano() 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。