Java中的 IsoChronology zonedDateTime(Instant, ZoneId) 方法与示例

Java.time.chrono.IsoChronology类的zonedDateTime()方法用于根据特定时刻的 Iso 日历检索特定区域的日期和时间。

句法：

public ZonedDateTime zonedDateTime(Instant instant,
                                   ZoneId zone)

参数：此方法将以下参数作为参数。

• 瞬间：这是瞬间类型的对象
• zone：这是 zoneId 类型的对象

返回值：此方法根据特定时刻的 Iso 日历返回特定区域的日期和时间。

下面是说明zonedDateTime()方法的示例：

示例 1：

// Java program to demonstrate
// zonedDateTime() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing LocalDate Object
            LocalDate hidate = LocalDate.now();
  
            // getting IsoChronology used in LocalDate
            IsoChronology crono = hidate.getChronology();
  
            // getting LocalDate and time for the
            // given Instant and ZoneId
            // by using zonedDateTime() method
            ChronoZonedDateTime date
                = crono.zonedDateTime(
                    Instant.now(),
                    ZoneId.systemDefault());
  
            // display the result
            System.out.println("LocalDate and time is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出：

LocalDate and time is: 2020-03-10T02:37:13.036Z[Etc/UTC]

示例 2：

// Java program to demonstrate
// zonedDateTime() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
            // creating and initializing LocalDate Object
            LocalDate hidate = LocalDate.now();
  
            // getting IsoChronology used in LocalDate
            IsoChronology crono = hidate.getChronology();
  
            // getting HijrahDate and time for the
            // given Instant and ZoneId
            // by using zonedDateTime() method
            ChronoZonedDateTime date
                = crono.zonedDateTime(
                    Instant.ofEpochSecond(25000),
                    ZoneId.systemDefault());
  
            // display the result
            System.out.println("LocalDate and time is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can "
                               + "not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出：

LocalDate and time is: 1970-01-01T06:56:40Z[Etc/UTC]

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/chrono/IsoChronology.html#zonedDateTime-java.time.Instant-java.time.ZoneId-