java clock計時

Clock Class systemUTC()方法 (Clock Class systemUTC() method)

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

  systemUTC()方法在java.time包中可用。

• systemUTC() method is used to get a Clock that implements the suitable system clock in the UTC zone.

  systemUTC()方法用于獲取在UTC區域中實現適當系統時鐘的Clock。

• systemUTC() 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.

  systemUTC()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，則不會出錯。

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

  在表示Clock時， systemUTC()方法不會引發異常。

Syntax:

句法：

    public static Clock systemUTC();

Parameter(s):

參數：

• None

  沒有

Return value:

返回值：

The return type of this method is Clock, it returns the present instant that use the relevant system clock in the UTC zone.

該方法的返回類型為Clock ，它返回使用UTC區域中相關系統時鐘的當前時刻。

Example:

例：

// Java program to demonstrate the example 
// of systemUTC() method of Clock
import java.time.*;
public class SystemUTCOfClock {
public static void main(String args[]) {
// Instantiates a 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 returns the current
// instant with help of using the system clock 
// in the UTC time-zone
Clock sys_utc_zone = cl1.systemUTC();
System.out.println("cl1.systemUTC(): " + sys_utc_zone.toString());
sys_utc_zone = Clock.systemUTC();
System.out.println("Clock.systemUTC(): " + sys_utc_zone.toString());
}
}

Output

輸出量

cl1.systemUTC(): SystemClock[Z]
Clock.systemUTC(): SystemClock[Z]

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

java clock計時