Java JapaneseChronology dateEpochDay()用法及代碼示例

使用java.time.chrono.JapaneseChronology類的dateEpochDay()方法從大紀元開始根據日語日曆係統獲取日語日期。

用法:

public JapaneseDate dateEpochDay(long epochDay)

參數：此方法將類型為epochDay的long作為參數。

返回值：此方法根據日語日曆係統從另一個TemporalAccessor對象返回本地日期。

異常：如果此時代無法創建日語日期，則此方法將引發DateTimeException。

下麵的示例說明了dateEpochDay()方法：

範例1：

// Java program to demonstrate 
// dateEpochDay() 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(); 
  
            // display the result 
            System.out.println("current JapaneseDate is:"
                               + hidate); 
  
            // getting JapaneseDate for the 
            // given TemporalAccessor object 
            // by using date() method 
            hidate = crono.dateEpochDay(23456); 
  
            // display the result 
            System.out.println("\nJapaneseDate(accoding "
                               + "to ephochday) is:"
                               + hidate); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

current JapaneseDate is:Japanese Heisei 32-04-13

JapaneseDate(accoding to ephochday) is:Japanese Heisei 46-03-22

範例2：

// Java program to demonstrate 
// dateEpochDay() 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(); 
  
            // display the result 
            System.out.println("current JapaneseDate is:"
                               + hidate); 
  
            // getting JapaneseDate for the 
            // given TemporalAccessor object 
            // by using date() method 
            hidate = crono.dateEpochDay(-999999999); 
  
            // display the result 
            System.out.println("\nJapaneseDate(accoding "
                               + "to ephochday) is:"
                               + hidate); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

current JapaneseDate is:Japanese Heisei 32-04-13
passed parameter can not form a date
Exception thrown:java.time.DateTimeException:JapaneseDate before Meiji 6 is not supported

參考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/JapaneseChronology.html#dateEpochDay-long-

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注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 JapaneseChronology dateEpochDay() method in Java with Example。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。