Java 中的 SimpleTimeZone inDaylightTime()方法，示例
原文:https://www . geesforgeks . org/simple time zone-indaylighttime-method-in-Java-with-examples/
Java 中 SimpleTimeZone 类 的 inDaylightTime( Date )方法用于检查并验证给定日期是否为夏令时。
语法:
public boolean inDaylightTime(Date date)
参数:该方法取日期类型的一个参数日期，即待校验的给定日期。
返回值:如果传递的日期相对于夏令时无效，则该方法返回布尔值“真”，否则该方法返回布尔值“假”。
下面的程序说明了 inDaylightTime()方法在 Java 中的使用: 示例 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);
}
}
Output:
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);
}
}
Output:
Is it in day light saving time? false
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