Java IsoChronology dateYearDay(Era, int, int)用法及代码示例

java.time.chrono.IsoChronology类的dateYearDay()方法用于根据特定时代的Iso日历检索本地日期。

用法:

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

参数：此方法采用以下参数作为参数。

era:这是Era类型的对象
year:这是LocalDate的year字段的整数年
day:这是LocalDate的day字段的整数天

返回值：此方法根据特定时代的Iso日历返回本地日期。

下面是说明dateYearDay()方法的示例：

范例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); 
        } 
    } 
}

输出：

LocalDate is:-1439-01-24

范例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); 
        } 
    } 
}

输出：

LocalDate is:0001-01-30

参考： 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：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 IsoChronology dateYearDay(Era, int, int) method in Java with Example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。