Java ZonedDateTime withLaterOffsetAtOverlap()方法及示例

ZonedDateTime 类的 withLaterOffsetAtOverlap() 方法用于在将区域偏移量改为本地时间线重叠处的两个有效偏移量中较晚的一个后返回该ZonedDateTime对象的副本。重叠发生在夏令时结束后，一个小时被返回到时间线。因此，本地日期时间有两个有效的偏移量，调用withLaterOffsetAtOverlap方法将返回两个区域中较晚的ZonedDateTime。如果在不是重合的时候调用这个方法，则会返回这个。这个实例是不可改变的，不受这个方法调用的影响。

语法

public ZonedDateTime withLaterOffsetAtOverlap()

参数： 该方法不接受任何参数。

返回值： 该方法返回一个基于该日期时间的 ZonedDateTime ，并带有较晚的偏移。

下面的程序说明了withLaterOffsetAtOverlap()方法。

程序1 :

// Java program to demonstrate
// ZonedDateTime.withLaterOffsetAtOverlap() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a ZonedDateTime object
        ZonedDateTime zonedDT
            = ZonedDateTime.of(
                LocalDateTime.of(2018, 11, 4, 1, 25, 43),
                ZoneId.of("US/Central"));
  
        // print ZonedDateTime
        System.out.println("Before withLaterOffsetAtOverlap(): "
                           + zonedDT);
  
        // apply withLaterOffsetAtOverlap()
        ZonedDateTime zonedDT2
            = zonedDT.withLaterOffsetAtOverlap();
  
        // print ZonedDateTime after withLaterOffsetAtOverlap()
        System.out.println("After withLaterOffsetAtOverlap(): "
                           + zonedDT2);
    }
}

输出。

Before withLaterOffsetAtOverlap(): 2018-11-04T01:25:43-05:00[US/Central]
After withLaterOffsetAtOverlap(): 2018-11-04T01:25:43-06:00[US/Central]

程序2

// Java program to demonstrate
// ZonedDateTime.withLaterOffsetAtOverlap() method
  
import java.time.*;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // create a ZonedDateTime object
        ZonedDateTime zonedDT
            = ZonedDateTime.of(
                LocalDateTime.of(2021, 11, 07, 1, 05, 53),
                ZoneId.of("US/Central"));
  
        // print ZonedDateTime
        System.out.println("Before withLaterOffsetAtOverlap(): "
                           + zonedDT);
  
        // apply withLaterOffsetAtOverlap()
        ZonedDateTime zonedDT2
            = zonedDT.withLaterOffsetAtOverlap();
  
        // print ZonedDateTime after withLaterOffsetAtOverlap()
        System.out.println("After withLaterOffsetAtOverlap(): "
                           + zonedDT2);
    }
}

输出。

Before withLaterOffsetAtOverlap(): 2021-11-07T01:05:53-05:00[US/Central]
After withLaterOffsetAtOverlap(): 2021-11-07T01:05:53-06:00[US/Central]

参考资料: https://docs.oracle.com/javase/10/docs/api/java/time/ZonedDateTime.html#withLaterOffsetAtOverlap()