Java IsoChronology dateEpochDay()用法及代码示例

java.time.chrono.IsoChronology类的dateEpochDay()方法用于从大纪元开始根据ISO系统获取本地日期。

用法:

public IsoDate dateEpochDay(long epochDay)

参数：此方法将类型为epochDay的long作为参数。

返回值：此方法根据Hijrah日历系统从另一个TemporalAccessor对象返回IsoDate。

下面是说明dateEpochDay()方法的示例：

范例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 LocalDate Object 
            LocalDate hidate = LocalDate.now(); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = hidate.getChronology(); 
  
            // display the result 
            System.out.println("current LocalDate is:"
                               + hidate); 
  
            // getting LocalDate for the 
            // given TemporalAccessor object 
            // by using date() method 
            hidate = crono.dateEpochDay(23456); 
  
            // display the result 
            System.out.println("\nLocalDate(accoding "
                               + "to ephochday) is:"
                               + hidate); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

current LocalDate is:2020-03-08

LocalDate(accoding to ephochday) is:2034-03-22

范例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  LocalDate Object 
            LocalDate hidate = LocalDate.of(00000, 01, 01); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = hidate.getChronology(); 
  
            // display the result 
            System.out.println("current LocalDate is:"
                               + hidate); 
  
            // getting LocalDate for the 
            // given TemporalAccessor object 
            // by using date() method 
            hidate = crono.dateEpochDay(-999999999); 
  
            // display the result 
            System.out.println("\nLocalDate(accoding "
                               + "to ephochday) is:"
                               + hidate); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

current LocalDate is:0000-01-01

LocalDate(accoding to ephochday) is:-2735938-12-30

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

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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 dateEpochDay() 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。