Java中的 JapaneseChronology date(int, int, int) 方法与示例

Java.time.chrono.JapaneseChronology类的date()方法用于根据日本日历系统获取给定年、月和日的本地日期。
句法：

public JapaneseDate date(int prolepticYear,
                         int month,
                         int dayOfMonth)

参数：此方法将以下参数作为参数。

• prolepticYear：日语年份字段的整数预测年份
• 月份：日语月份字段的整数月份
• day：日文day字段的整数天

返回值：该方法根据日本日历系统返回给定年月日的日本日期。
异常：如果给定的日、月和年字段无法形成结构化日期，则此方法抛出DateTimeException 。
以下是说明date()方法的示例：
示例 1：

Java

// Java program to demonstrate
// date() 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 lodate
                = JapaneseDate.now();
 
            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = lodate.getChronology();
 
            // getting JapaneseDate for the
            // given date, month and year field
            // by using date() method
            JapaneseDate date
                = crono.date(2018, 05, 24);
 
            // 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 30-05-24

示例 2：

Java

// Java program to demonstrate
// date() 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 lodate
                = JapaneseDate.now();
 
            // getting JapaneseChronology
            // used in JapaneseDate
            JapaneseChronology crono
                = lodate.getChronology();
 
            // getting JapaneseDate for the
            // given date, month and year field
            // by using date() method
            JapaneseDate date
                = crono.date(1440, 05, 24);
 
            // 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

passed parameter can not form a date
Exception thrown: java.time.DateTimeException: JapaneseDate before Meiji 6 is not supported

参考： https://docs.oracle.com/javase/9/docs/api/ Java/time/chrono/JapaneseChronology.html#date-int-int-int-