Java SimpleTimeZone inDaylightTime()方法及示例

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Java SimpleTimeZone inDaylightTime()方法及示例

Java中 SimpleTimeZone类 的 inDaylightTime( Date )方法 用于检查和验证给定日期是否在夏令时。

语法

public boolean inDaylightTime(Date date)

参数： 该方法需要一个 Date 类型的参数date，这是需要验证的给定日期。

返回值： 如果传递的日期在夏令时方面是无效的，该方法返回布尔值True，否则该方法返回布尔值False。

下面的程序说明了在Java中使用inDaylightTime()方法的情况：
例1 :

// Java code to demonstrate// inDaylightTime() method  import java.util.*;  public class SimpleTimeZone_Demo {    public static void main(String[] args)    {        // Creating a time zone object        SimpleTimeZone simtimeobj            = new SimpleTimeZone(540, "GMT");          // Creating date object        Date dt = new Date();          // Verifying daylight        boolean bool_daylight            = simtimeobj.inDaylightTime(dt);          // Checking the value of day light        System.out.println("Is it in day"                           + " light saving time? "                           + bool_daylight);    }}

输出:

Is it in day light saving time? false

例2 :

// Java code to demonstrate// inDaylightTime() method  import java.util.*;  public class SimpleTimeZone_Demo {    public static void main(String[] args)    {        // Creating a time zone object        SimpleTimeZone simtimeobj            = new SimpleTimeZone(400, "AUS");          // Creating a Calendar object        Calendar c1 = Calendar.getInstance();          // Set Month        // MONTH starts with 0 i.e.(0 - Jan)        c1.set(Calendar.MONTH, 00);          // Set Date        c1.set(Calendar.DATE, 30);          // Set Year        c1.set(Calendar.YEAR, 2019);          // Creating a date object        // with specified time.        Date dt = c1.getTime();          // Verifying daylight        boolean bool_daylight            = simtimeobj.inDaylightTime(dt);          // Checking the value of day light        System.out.println("Is it in day"                           + " light saving time? "                           + bool_daylight);    }}

输出: