Java 中的 Instant plusNanos()方法，示例

原文:https://www . geesforgeks . org/instant-plusnanos-method-in-Java-with-examples/

Instant 类的 plusNanos() 方法将作为参数传递的纳秒值添加到该瞬间，并将结果作为即时对象返回。这个返回的即时消息是不可变的。

语法:

public Instant plusNanos(long nanosToAdd)

参数:该方法接受一个参数nanostoad，需要加上纳秒。

返回:此方法返回瞬间，不为空。

异常:如果结果超过最大或最小瞬间，该方法抛出以下异常:

  • 日期时间异常:。
  • Arithmetic exception: If there is a numerical overflow.

下面的程序说明了 plusNanos()方法:

程序 1:

// Java program to demonstrate
// Instant.plusNanos() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a Instant object
        Instant instant
            = Instant.parse("2018-10-28T19:34:50.63Z");

        // addition of 840000000 nanoseconds
        // means .84 seconds to this instant
        Instant returnedValue
            = instant.plusNanos(840000000);

        // print result
        System.out.println("Returned Instant: "
                           + returnedValue);
    }
}

输出:

Returned Instant: 2018-10-28T19:34:51.470Z

程序二:

// Java program to demonstrate
// Instant.plusNanos() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create a Instant object
        Instant instant = Instant.now();

        // current Instant
        System.out.println("Current instant: "
                           + instant);

        // addition of 430000000 nanoseconds
        // means .43 seconds to this instant
        Instant returnedValue
            = instant.plusNanos(430000000);

        // print result
        System.out.println("Returned Instant: "
                           + returnedValue);
    }
}

输出:

Current instant: 2018-11-28T05:32:40.818Z
Returned Instant: 2018-11-28T05:32:41.248Z

参考文献:https://docs . Oracle . com/javase/10/docs/API/Java/time/instant . html # plusNanos(长)

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