java timezone

TimeZone類useDaylightTime()方法 (TimeZone Class useDaylightTime() method)

• useDaylightTime() method is available in java.util package.

  useDaylightTime()方法在java.util包中可用。

• useDaylightTime() method is used to check whether this time zone uses daylight savings time or not.

  useDaylightTime()方法用于檢查此時區是否使用夏時制。

• useDaylightTime() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

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

• useDaylightTime() method does not throw an exception at the time of checking daylight savings.

  useDaylightTime()方法在檢查夏時制時不會引發異常。

Syntax:

句法：

    public abstract boolean useDaylightTime();

Parameter(s):

參數：

• It does not accept any parameter.

  它不接受任何參數。

Return value:

返回值：

The return type of the method is boolean, it returns true when this time zone uses DST (daylight savings time) otherwise it returns false.

方法的返回類型為boolean ，當該時區使用DST(夏令時)時返回true，否則返回false。

Example:

例：

// Java program to demonstrate the example 
// of boolean useDaylightTime() method 
// of TimeZone 
import java.util.*;
public class UseDaylightTimeOfTimeZone {
public static void main(String args[]) {
// Instantiates two TimeZone object
TimeZone tz = TimeZone.getTimeZone("Africa/Asmera");
// Display tz
System.out.println("tz: " + tz);
// By using useDaylightTime() method is to
// check whether time zone tz use daylight time or
// not
boolean status = tz.useDaylightTime();
System.out.print("tz.useDaylightTime(): ");
System.out.println(status);
}
}

Output

輸出量

tz: sun.util.calendar.ZoneInfo[id="Africa/Asmera",offset=10800000,dstSavings=0,useDaylight=false,transitions=6,lastRule=null]
tz.useDaylightTime(): false

翻譯自: https://www.includehelp.com/java/timezone-usedaylighttime-method-with-example.aspx

java timezone