Java中的 ZonedDateTime withZoneSameInstant() 方法及示例

ZonedDateTime类的withZoneSameInstant()方法用于通过更改时区而不是瞬间返回此 ZonedDateTime 对象的副本。该方法基于保留同一时刻，因此本地时间线中的间隙和重叠对结果没有影响。

句法：

public ZonedDateTime withZoneSameInstant(ZoneId zone)

参数：此方法接受一个参数zone来更改时区。它不应该为空。

返回值：此方法基于此日期时间与请求的区域返回ZonedDateTime 。

抛出异常：如果结果超出支持的日期范围，则DateTimeException 。

示例 1：

Java

// 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]

示例 2：

Java

// 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]