Java中的 TimeZone 观察DaylightTime() 方法及示例
Java中TimeZone 类的observesDaylightTime()方法用于检查和验证给定日期是否处于夏令时,或者将来任何时间是否会发生从标准时间到夏令时的任何转换。
句法:
public boolean observesDaylightTime()
参数:该方法不带任何参数。
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 True,否则该方法返回布尔值 False。默认情况下,该方法返回 True。
下面的程序说明了Java中observesDaylightTime()方法的使用:
示例 1:
// Java code to demonstrate
// observesDaylightTime() method
import java.util.*;
public class TimeZone_Demo {
public static void main(String[] args)
{
// Creating a time zone object
TimeZone timeobj
= TimeZone
.getTimeZone("Pacific/Pago_Pago");
// Displaying the time zone
System.out.println(timeobj);
// Verifying daylight
boolean bool_daylight
= timeobj.observesDaylightTime();
// Checking the value of day light
System.out.println("The result is: "
+ bool_daylight);
}
}
输出:
sun.util.calendar.ZoneInfo[id=”Pacific/Pago_Pago”, offset=-39600000, dstSavings=0,
useDaylight=false, transitions=3, lastRule=null]
The result is: false
示例 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
TimeZone timeobj
= TimeZone
.getTimeZone("Indian/Chagos");
// Displaying the time zone
System.out.println(timeobj);
// Verifying daylight
boolean bool_daylight
= timeobj.observesDaylightTime();
// Checking the value of day light
System.out.println("The result is: "
+ bool_daylight);
}
}
输出:
sun.util.calendar.ZoneInfo[id=”Indian/Chagos”, offset=21600000, dstSavings=0, useDaylight=false, transitions=4, lastRule=null]
The result is: false
参考: https: Java/util/TimeZone.html#observesDaylightTime()