ZonedDateTime類的minusNanos()方法用於從此ZonedDateTime中減去納秒數,並在減去後返回ZonedDateTime的副本。此方法在即時時間軸上起作用,並在減去1納秒的時間之前返回1納秒的時間軸。請注意,此方法與幾天,幾個月和幾年使用的方法不同。此實例是不可變的,不受此方法調用的影響。
用法:
public ZonedDateTime minusNanos(long nanoseconds)
參數:此方法接受單個參數納秒,該參數代表要減去的納秒,它可以為負。
返回值:此方法基於此日期時間返回一個ZonedDateTime,並減去納秒。
異常:如果結果超出支持的日期範圍,則此方法將引發DateTimeException。
以下示例程序旨在說明minusNanos()方法:
示例1:
// 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);
}
}
ZonedDateTime before subtracting nanoseconds: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime after subtracting 30000000 nanoseconds: 2018-12-06T19:21:12.093+05:30[Asia/Calcutta]
示例2:
// 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);
}
}
ZonedDateTime before subtracting nanoseconds: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime after subtracting 52000000 nanoseconds: 2018-10-25T23:12:31.071+02:00[Europe/Paris]
參考: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#minusNanos(long)
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注:本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 ZonedDateTime minusNanos() method in Java with Examples。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。