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 Clockimport 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(): 2020-05-13T18:38:03.026909Zcl2.instant(): 2020-05-13T18:38:03.077464Z

翻译自:

java clock计时