Java中的 JapaneseChronology localDateTime() 方法与示例

Java.time.chrono.JapaneseChronology类的localDateTime()方法用于根据日本日历系统从时间访问器的任何其他对象中检索本地日期和时间。

句法：

public ChronoLocalDateTime localDateTime
               (TemporalAccessor temporal)

参数：此方法将任何时间访问器的对象作为参数。

返回值：此方法从临时访问器的任何其他对象返回根据日本日历系统的本地日期和时间。

以下是说明localDateTime()方法的示例：

示例 1：

// Java program to demonstrate
// localDateTime() 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();
  
            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();
  
            // creating and initializing
            // TemporalAccessor object
            ZonedDateTime zonedate
                = ZonedDateTime.parse(
                    "2018-10-25T23:12:31."
                    + "123+02:00[Europe/Paris]");
  
            // getting JapaneseDate for the
            // given TemporalAccessor object
            // by using localDateTime() method
            ChronoLocalDateTime date
                = crono.localDateTime(zonedate);
  
            // display the result
            System.out.println("JapaneseDate is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println(
                "passed parameter can"
                + " not form a date");
            System.out.println(
                "Exception thrown: " + e);
        }
    }
}

输出：

JapaneseDate is: Japanese Heisei 30-10-25T23:12:31.123

示例 2：

// Java program to demonstrate
// localDateTime() 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();
  
            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = hidate.getChronology();
  
            // creating and initializing
            // TemporalAccessor object
            LocalDateTime localdate
                = LocalDateTime
                      .parse("2018-12-30T19:34:50.63");
  
            // getting JapaneseDate for the
            // given TemporalAccessor object
            // by using localDateTime() method
            ChronoLocalDateTime date
                = crono.localDateTime(localdate);
  
            // display the result
            System.out.println("JapaneseDate is: "
                               + date);
        }
        catch (DateTimeException e) {
            System.out.println("passed parameter can"
                               + " not form a date");
            System.out.println("Exception thrown: " + e);
        }
    }
}

输出：

JapaneseDate is: Japanese Heisei 30-12-30T19:34:50.630

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/chrono/JapaneseChronology.html#localDateTime-java.time.temporal.TemporalAccessor-