Java IsoChronology prolepticYear()用法及代码示例

java.time.chrono.IsoChronology类的prolepticYear()方法用于检索特定hijrah时代的Iso系统中出现的通行年份。

用法:

public int prolepticYear(Era era,
                         int yearOfEra)

参数：此方法将以下参数作为参数。

era:这是iso时代的目标。
yearofEra:这是特定iso时代的一年。

返回值：该方法返回特定iso时代的iso系统中存在的有效年份。

下面是说明prolepticYear()方法的示例：

范例1：

// Java program to demonstrate 
// prolepticYear() 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 prolepticYear for the 
            // given year of Era 
            // by using prolepticYear() method 
            int proyear 
                = crono.prolepticYear(IsoEra.CE, 2020); 
  
            // display the result 
            System.out.println("proleptic Year is:"
                               + proyear); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

proleptic Year is:2020

范例2：

// Java program to demonstrate 
// prolepticYear() 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 prolepticYear for the 
            // given year of Era 
            // by using prolepticYear() method 
            int proyear 
                = crono.prolepticYear(IsoEra.BCE, 1980); 
  
            // display the result 
            System.out.println("proleptic Year is:"
                               + proyear); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed parameter can"
                               + " not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

proleptic Year is:-1979

参考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#prolepticYear-java.time.chrono.Era-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 prolepticYear() 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。