Java IsoChronology dateYearDay(Era, int, int)用法及代碼示例

java.time.chrono.IsoChronology類的dateYearDay()方法用於根據特定時代的Iso日曆檢索本地日期。

用法:

public LocalDate dateYearDay(Era era,
                             int yearOfEra,
                             int dayOfYear)

參數：此方法采用以下參數作為參數。

era:這是Era類型的對象
year:這是LocalDate的year字段的整數年
day:這是LocalDate的day字段的整數天

返回值：此方法根據特定時代的Iso日曆返回本地日期。

下麵是說明dateYearDay()方法的示例：

範例1：

// 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 
            // LocalDate Object 
            LocalDate hidate = LocalDate.now(); 
  
            // getting IsoChronology 
            // used in LocalDate 
            IsoChronology crono 
                = hidate.getChronology(); 
  
            // getting LocalDate for the 
            // given date and year field 
            // by using dateYearDay() method 
            LocalDate date 
                = crono.dateYearDay( 
                    IsoEra.BCE, 1440, 24); 
  
            // display the result 
            System.out.println("LocalDate is:"
                               + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can "
                               + "not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

LocalDate is:-1439-01-24

範例2：

// 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 
            // LocalDate Object 
            LocalDate hidate = LocalDate.now(); 
  
            // getting IsoChronology 
            // used in LocalDate 
            IsoChronology crono 
                = hidate.getChronology(); 
  
            // getting LocalDate for the 
            // given date and year field 
            // by using dateYearDay() method 
            LocalDate date 
                = crono.dateYearDay( 
                    IsoEra.BCE, 0000, 30); 
  
            // display the result 
            System.out.println("LocalDate is:"
                               + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can "
                               + "not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

輸出：

LocalDate is:0001-01-30

參考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#dateYearDay-java.time.chrono.Era-int-int-

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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 IsoChronology dateYearDay(Era, int, int) 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。