Java ZonedDateTime withZoneSameInstant()方法及示例

ZonedDateTime 类的 withZoneSameInstant() 方法用于通过改变时区和不改变瞬间来返回该ZonedDateTime对象的副本。这个方法是基于保留相同的瞬间，因此本地时间线的间隙和重叠对结果没有影响。

语法

public ZonedDateTime withZoneSameInstant(ZoneId zone)

参数： 该方法接受一个单一的参数 zone ，即要改变的时区。它不应该是空的。

返回值： 该方法返回一个基于该日期时间的 ZonedDateTime ，并带有请求的区域。

抛出的异常： 如果结果超过了支持的日期范围，就会 出现DateTimeException 。

例子1 :

// Java program to demonstrate
// ZonedDateTime.withZoneSameInstant() method
 
// Importing required classes
import java.time.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Creating a ZonedDateTime object
        ZonedDateTime zonedDT = ZonedDateTime.parse(
            "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");
 
        // Printing ZonedDateTime of Calcutta on console
        System.out.println("ZonedDateTime of Calcutta: "
                           + zonedDT);
 
        // Applying withZoneSameInstant()
        ZonedDateTime zonedDT2
            = zonedDT.withZoneSameInstant(
                ZoneId.of("Pacific/Fiji"));
 
        // Now printing ZonedDateTime of Fuji
        // after withZoneSameInstant()
        System.out.println("ZonedDateTime of Fuji: "
                           + zonedDT2);
    }
}

输出

ZonedDateTime of Calcutta: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta]
ZonedDateTime of Fuji: 2018-12-07T02:51:12.123+13:00[Pacific/Fiji]

例2 :

// Java program to Demonstrate
// ZonedDateTime.withZoneSameInstant() method
 
// Importing required classes
import java.time.*;
 
// Main class
public class GFG {
 
    // Main driver method
    public static void main(String[] args)
    {
        // Creating a ZonedDateTime object and
        // passing date and time of Europe/Paris
        ZonedDateTime zonedDT = ZonedDateTime.parse(
            "2018-10-25T23:12:31.123+02:00[Europe/Paris]");
 
        // Printing ZonedDateTime of Paris on console
        // before applying withZoneSameInstant() method
        System.out.println("ZonedDateTime of Paris: "
                           + zonedDT);
 
        // Now applying withZoneSameInstant() method
        ZonedDateTime zonedDT2
            = zonedDT.withZoneSameInstant(
                ZoneId.of("Canada/Yukon"));
 
        // Printing ZonedDateTime
        // after applying withZoneSameInstant()
        System.out.println("ZonedDateTime of Yukon: "
                           + zonedDT2);
    }
}

输出

ZonedDateTime of Paris: 2018-10-25T23:12:31.123+02:00[Europe/Paris]
ZonedDateTime of Yukon: 2018-10-25T14:12:31.123-07:00[Canada/Yukon]