Java 中的 Duration toNanos()方法，示例
原文:https://www . geesforgeks . org/duration-tonanos-method-in-Java-with-examples/
使用 java.time 包中持续时间类的 toNanos() 方法获取该持续时间的值，单位为纳米秒。
语法:
public long toNanos()
参数:该方法不接受任何参数。
返回值:此方法返回一个长值，即此时长内的纳秒数。
以下示例说明了 Duration.toNanos()方法:
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
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–
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