java 根据类名示例化类
即时类minusNanos()方法 (Instant Class minusNanos() method)
minusNanos() method is available in java.time package.
minusNanos()方法在java.time包中可用。
minusNanos() method is used to subtract the given duration in nanoseconds from this Instant and returns the Instant.
minusNanos()方法用于从此Instant减去给定的持续时间(以纳秒为单位)，并返回Instant。
minusNanos() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
minusNanos()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。
minusNanos() method may throw an exception at the time of performing subtraction.
minusNanos()方法在执行减法时可能会引发异常。
ArithmeticException: This exception may throw when the calculated result value exceeds the limit.
ArithmeticException ：当计算结果值超过限制时，可能引发此异常。
Syntax:
句法：
public Instant minusNanos(long nanos_val);
Parameter(s):
参数：
long nanos_val – represents the nanoseconds to be subtracted from this Instant.
long nanos_val –表示要从此Instant减去的纳秒。
Return value:
返回值：
The return type of this method is Instant, it returns the Instant that holds the value subtracted the given duration in nanoseconds from this Instant.
此方法的返回类型为Instant ，它返回的Instant保持从该Instant减去给定持续时间(以纳秒为单位)的值。
Example:
例：
// Java program to demonstrate the example
// of minusNanos(long nanos_val) method
// of Instant
import java.time.*;
public class MinusNanosOfInstant {
public static void main(String args[]) {
long nanos = 200000;
// Instantiates two Instant
Instant ins1 = Instant.parse("2006-04-03T05:10:15.60Z");
Instant ins2 = Instant.now();
// Display ins1,ins2 and nanos
System.out.println("Instant ins1 and ins2: ");
System.out.println("ins1: " + ins1);
System.out.println("ins2: " + ins2);
System.out.println("nanos to substract: " + nanos);
System.out.println();
// Here, this method subtracts the given duration
// in nanoseconds from this Instant ins1
// i.e. here we are substracting the given
// 200000 nanos from this ins1
Instant minus_nanos = ins1.minusNanos(nanos);
// Display minus_nanos
System.out.println("ins1.minusNanos(nanos): " + minus_nanos);
// Here, this method subtracts the given duration
// in nanoseconds from this Instant ins2
// i.e. here we are substracting the given
// 200000 nanos from this ins2
minus_nanos = ins2.minusNanos(nanos);
// Display minus_nanos
System.out.println("ins2.minusNanos(nanos): " + minus_nanos);
}
}
Output
输出量
Instant ins1 and ins2:
ins1: 2006-04-03T05:10:15.600Z
ins2: 2020-05-26T23:36:39.457119Z
nanos to substract: 200000ins1.minusNanos(nanos): 2006-04-03T05:10:15.599800Z
ins2.minusNanos(nanos): 2020-05-26T23:36:39.456919Z
翻译自: https://www.includehelp.com/java/instant-minusnanos-method-with-example.aspx
java 根据类名示例化类
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