Java 中的等时区数据时间(Instant，ZoneId)方法，示例

原文:https://www . geesforgeks . org/isochronomics-zoneddatetimeinstant-zoneid-method-in-Java-with-example/

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。

语法:

public ZonedDateTime zonedDateTime(Instant instant,
                                   ZoneId zone)

参数:该方法以下列参数为参数。

  • Instantaneous: is instantaneous.
  • Type of object area: is zoneId.

类型的对象

返回值:该方法根据特定时刻的 Iso 日历返回特定区域的日期和时间。

以下是说明区域时间()方法的示例:

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<LocalDate> 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]

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<LocalDate> 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/isochronomics . html # zonedDateTime-Java . time . instant-Java . time . zoneid-

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