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

Java.time.chrono.JapaneseChronology类的dateYearDay()方法用于根据特定年份和日期的 Iso 日历检索日本日期。
句法：

public JapaneseDate dateYearDay(
  int prolepticYear, int dayOfYear)

参数：此方法将以下参数作为参数：

• year：这是 JapaneseDate 的 year 字段的整数预测年份
• day：这是 JapaneseDate 的 day 字段的整数天

返回值：此方法根据特定年份和日期的日本日历返回日本日期。
异常：此方法抛出DateTimeException - 如果给定数据无法形成日期。
以下是说明dateYearDay()方法的示例：
示例 1：

Java

// Java program to demonstrate
// dateYearDay() 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();
 
            // getting JapaneseDate for the
            // given date and year field
            // by using dateYearDay() method
            JapaneseDate date
                = crono.dateYearDay(2018, 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 30-01-24

示例 2：

Java

// Java program to demonstrate
// dateYearDay() 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();
 
            // getting JapaneseDate for the
            // given date and year field
            // by using dateYearDay() method
            JapaneseDate date
                = crono.dateYearDay(1440, 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#dateYearDay-int-int-