java clock计时

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()方法用于获取使用默认区域中的系统时钟的当前时刻。

• 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()方法是静态方法，可以使用类名进行访问，如果尝试使用类对象访问该方法，则不会收到错误。

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

  systemDefaultZone()方法在表示Clock时不会引发异常。

Syntax:

句法：

    public static Clock systemDefaultZone();

Parameter(s):

参数：

• None

  没有

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.

此方法的返回类型为Clock ，它返回使用默认区域中的系统时钟的Clock对象。

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

输出量

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

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

java clock计时