java clock计时

Clock Class Instant()方法 (Clock Class instant() method)

• instant() method is available in java.time package.

  Instant()方法在java.time包中可用。

• instant() method is used to get the current instant that is used with this Clock.

  Instant()方法用于获取与此Clock一起使用的当前时刻。

• instant() method is a non-static method, it is accessible with the class object and if we try to access the method with the class name then we will get an error.

  Instant()方法是一种非静态方法，可通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• instant() method may throw an exception at the time of returning instant.

  Instant()方法在返回Instant时可能会引发异常。

  DateTimeException: This exception may throw when no instant couldn’t be generated (i.e. invalid instant is used with this Clock).

  DateTimeException ：当无法生成任何瞬间时(例如，此Clock使用无效的瞬间)，可能会引发此异常。

Syntax:

句法：

    public Instant instant();

Parameter(s):

参数：

• None

  没有

Return value:

返回值：

The return type of this method is Instant, it returns the present instant that is used with this Clock.

此方法的返回类型为Instant ，它返回与此Clock一起使用的当前时刻。

Example:

例：

// Java program to demonstrate the example 
// of instant() method of Clock
import java.time.*;
public class InstantOfClock {
public static void main(String args[]) {
// Instantiates two ZoneId for Accra and Asmara
ZoneId zone_1 = ZoneId.of("Africa/Accra");
ZoneId zone_2 = ZoneId.of("Africa/Asmara");
// Initialize two Clock objects  
Clock cl1 = Clock.system(zone_1);
Clock cl2 = Clock.system(zone_2);
// returns the current instant value of this Clock cl1
Instant cl_ins = cl1.instant();
// Display cl1 instant
System.out.println("cl1.instant(): " + cl_ins);
// returns the current instant value of this Clock cl2
cl_ins = cl2.instant();
// Display cl2 instant
System.out.println("cl2.instant(): " + cl_ins);
}
}

Output

输出量

cl1.instant(): 2020-05-13T18:38:03.026909Z
cl2.instant(): 2020-05-13T18:38:03.077464Z

翻译自: https://www.includehelp.com/java/clock-instant-method-with-example.aspx

java clock计时