Java Duration withNanos(long)用法及代码示例

java.time包中的Duration Class的withNanos(long)方法用于获取此持续时间的不可变副本，并将指定的纳秒量作为参数传递。

用法:

public Duration withNanos(long amountOfNanos)

参数：此方法接受参数纳秒数的数量OfNanos。

返回值：此方法返回作为参数传递的纳秒持续时间。

异常：如果纳秒无效，则此方法引发DateTimeException。

以下示例说明了Duration.withNanos()方法：

范例1：

// Java code to illustrate withNanos() method 
  
import java.time.Duration; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the amount of nano-seconds 
        int amountOfNanos = 30000; 
  
        // Duration using parse() method 
        Duration duration 
            = Duration.parse("P2DT3H4M"); 
  
        // Get the duration in nano-seconds 
        // using withNanos() method 
        System.out.println(duration 
                               .withNanos(amountOfNanos)); 
    } 
}

输出：

PT51H4M0.00003S

范例2：

// Java code to illustrate withNanos() method 
  
import java.time.Duration; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // Get the amount of nano-seconds 
        int amountOfNanos = 100000; 
  
        // Duration using ofHours() method 
        Duration duration = Duration.ofHours(5); 
  
        // Get the duration in nano-seconds 
        // using withNanos() method 
        System.out.println(duration 
                               .withNanos(amountOfNanos)); 
    } 
}

输出：

PT5H0.0001S

参考： https://docs.oracle.com/javase/9/docs/api/java/time/Duration.html#withNanos-int-

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注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 Duration withNanos(long) 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。