java clock計時

Clock Class systemDefaultZone()方法 (Clock Class systemDefaultZone() method)

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

  systemDefaultZone()方法在java.time包中可用。

• systemDefaultZone() method is used to get the current instant that uses the system clock in the default zone.

  systemDefaultZone()方法用于獲取使用默認區域中的系統時鐘的當前時刻。

• systemDefaultZone() method is a static method, it is accessible with the class name and if we try to access the method with the class object then we will not get an error.

  systemDefaultZone()方法是靜態方法，可以使用類名進行訪問，如果嘗試使用類對象訪問該方法，則不會收到錯誤。

• systemDefaultZone() method does not throw an exception at the time of representing Clock.

  systemDefaultZone()方法在表示Clock時不會引發異常。

Syntax:

句法：

    public static Clock systemDefaultZone();

Parameter(s):

參數：

• None

  沒有

Return value:

返回值：

The return type of this method is Clock, it returns the Clock object that uses the system clock in the default zone.

此方法的返回類型為Clock ，它返回使用默認區域中的系統時鐘的Clock對象。

Example:

例：

// Java program to demonstrate the example 
// of systemDefaultZone() method of Clock
import java.time.*;
public class SystemDefaultZoneOfClock {
public static void main(String args[]) {
// Instantiates two ZoneId for Accra 
ZoneId zone_1 = ZoneId.of("Africa/Accra");
// Instantiates a clock for
// the given zone_1 
Clock cl1 = Clock.system(zone_1);
// returns a Clock that is available in 
// the system default zone
Clock sys_def_zone = cl1.systemDefaultZone();
System.out.println("cl1.systemDefaultZone(): " + sys_def_zone.toString());
sys_def_zone = Clock.systemDefaultZone();
System.out.println("Clock.systemDefaultZone(): " + sys_def_zone.toString());
}
}

Output

輸出量

cl1.systemDefaultZone(): SystemClock[GMT]
Clock.systemDefaultZone(): SystemClock[GMT]

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

java clock計時