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📜  Java中的持续时间 toNanos() 方法和示例

📅  最后修改于: 2022-05-13 01:54:37.854000             🧑  作者: Mango

Java中的持续时间 toNanos() 方法和示例

使用Java.time 包Duration 类toNanos()方法获取此持续时间的值,以纳秒数为单位。

句法:

public long toNanos()

参数:此方法不接受任何参数。

返回值:此方法返回一个长值,它是此持续时间的纳秒数。

下面的示例说明了 Duration.toNanos() 方法:

示例 1:

// Java code to illustrate toNanos() method
  
import java.time.Duration;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Duration using parse() method
        Duration duration
            = Duration.parse("P2DT3H4M");
  
        System.out.println("Duration: "
                           + duration);
  
        // Get the number of nano-seconds
        // using toNanos() method
        System.out.println(duration.toNanos());
    }
}
输出:
Duration: PT51H4M
183840000000000

示例 2:

// Java code to illustrate toNanos() method
  
import java.time.Duration;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Duration using ofNanos() method
        Duration duration
            = Duration.ofNanos(10);
  
        System.out.println("Duration: "
                           + duration);
  
        // Get the number of nano-seconds
        // using toNanos() method
        System.out.println(duration.toNanos());
    }
}
输出:
Duration: PT0.00000001S
10

参考: https://docs.oracle.com/javase/9/docs/api/ Java/time/Duration.html#toNanos–