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📜  Java中的 ZonedDateTime minusNanos() 方法及示例

📅  最后修改于: 2022-05-13 01:55:29.986000             🧑  作者: Mango

Java中的 ZonedDateTime minusNanos() 方法及示例

ZonedDateTime类的minusNanos()方法,用于从此 ZonedDateTime 中减去纳秒数,并在减法后返回 ZonedDateTime 的副本。此方法适用于即时时间线,减去一纳秒返回早一纳秒的时间线。请注意,此方法与日、月和年使用的方法不同。此实例是不可变的,不受此方法调用的影响。

句法:

public ZonedDateTime minusNanos(long nanoseconds)

参数:此方法接受单个参数nanoseconds ,表示要减去的纳秒,它可以是负数。

返回值:此方法返回基于此日期时间减去纳秒的ZonedDateTime

异常:如果结果超出支持的日期范围,此方法将引发DateTimeException

下面的程序说明了 minusNanos() 方法:
方案一:

// Java program to demonstrate
// ZonedDateTime.minusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a ZonedDateTime object
        ZonedDateTime zoneddatetime
            = ZonedDateTime.parse(
                "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");
  
        // print instance
        System.out.println("ZonedDateTime before"
                           + " subtracting nanoseconds: "
                           + zoneddatetime);
  
        // subtract 30000000 nanoseconds
        ZonedDateTime returnvalue
            = zoneddatetime.minusNanos(30000000);
  
        // print result
        System.out.println("ZonedDateTime after "
                           + " subtracting 30000000 nanoseconds: "
                           + returnvalue);
    }
}
输出:

方案二:

// Java program to demonstrate
// ZonedDateTime.minusNanos() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a ZonedDateTime object
        ZonedDateTime zoneddatetime
            = ZonedDateTime.parse(
                "2018-10-25T23:12:31.123+02:00[Europe/Paris]");
  
        // print instance
        System.out.println("ZonedDateTime before"
                           + " subtracting nanoseconds: "
                           + zoneddatetime);
  
        // subtract 52000000 nanoseconds
        ZonedDateTime returnvalue
            = zoneddatetime.minusNanos(52000000);
  
        // print result
        System.out.println("ZonedDateTime after "
                           + " subtracting 52000000 nanoseconds: "
                           + returnvalue);
    }
}
输出:

参考: https: Java/time/ZonedDateTime.html#minusNanos(long)