java clock計時

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()方法用于獲取與此Clock一起使用的當前時刻。

• 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()方法是一種非靜態方法，可通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

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

  Instant()方法在返回Instant時可能會引發異常。

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

  DateTimeException ：當無法生成任何瞬間時(例如，此Clock使用無效的瞬間)，可能會引發此異常。

Syntax:

句法：

    public Instant instant();

Parameter(s):

參數：

• None

  沒有

Return value:

返回值：

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

此方法的返回類型為Instant ，它返回與此Clock一起使用的當前時刻。

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

輸出量

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

翻譯自: https://www.includehelp.com/java/clock-instant-method-with-example.aspx

java clock計時