java timezone

TimeZone类inDaylightTime()方法 (TimeZone Class inDaylightTime() method)

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

  inDaylightTime()方法在java.util包中可用。

• inDaylightTime() method is used to check whether the given date (d) is in daylight savings time (DST) or not in this TimeZone.

  inDaylightTime()方法用于检查给定日期(d)是否在此TimeZone中处于夏时制(DST)中。

• inDaylightTime() 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.

  inDaylightTime()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• inDaylightTime() method does not throw an exception at the time of checking the date in daylight.

  inDaylightTime()方法在白天检查日期时不会引发异常。

Syntax:

句法：

    public abstract boolean inDaylightTime(Date d);

Parameter(s):

参数：

• Date d – represents the date.

  日期d –表示日期。

Return value:

返回值：

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

该方法的返回类型为boolean ，当给定日期为DST(夏令时)时返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example
// of boolean inDaylightTime(Date d)
// method of TimeZone
import java.util.*;
public class InDaylightTimeOfTimeZone {public static void main(String args[]) {// Instantiates two TimeZone object
TimeZone tz1 = TimeZone.getTimeZone("Africa/Asmera");
TimeZone tz2 = TimeZone.getDefault();
Date d = new Date(2010, 02, 20);
// Display tz1 , tz1
System.out.println("tz1: " + tz1);
System.out.println("tz2: " + tz2);
// By using inDaylightTime() method is to
// check whether timezone is in daylight
// time or not
boolean status1 = tz1.inDaylightTime(d);
boolean status2 = tz2.inDaylightTime(d);
System.out.print("tz1.inDaylightTime(d): ");
System.out.println(status1);
System.out.print("tz1.inDaylightTime(d): ");
System.out.println(status2);
}
}

Output

输出量

tz1: sun.util.calendar.ZoneInfo[id="Africa/Asmera",offset=10800000,dstSavings=0,useDaylight=false,transitions=6,lastRule=null]
tz2: sun.util.calendar.ZoneInfo[id="GMT",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]
tz1.inDaylightTime(d): false
tz1.inDaylightTime(d): false

翻译自: https://www.includehelp.com/java/timezone-indaylighttime-method-with-example.aspx

java timezone