Java IsoChronology range()用法及代码示例

java.time.chrono.IsoChronology类的range()方法用于从ChronoField类型的指定字段获取范围。

用法:

public ValueRange range(ChronoField field)

参数：此方法将ChronoField类型的字段作为参数。

返回值：此方法从chrono类型的指定字段返回范围。

下面是说明range()方法的示例：

范例1：

// Java program to demonstrate 
// range() method 
  
import java.util.*; 
import java.io.*; 
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
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 the ValueRange for 
            // given ChronoField 
            // by using range() method 
            ValueRange range 
                = crono.range( 
                    ChronoField.ERA); 
  
            // display the result 
            System.out.println( 
                "Equivalent Range:"
                + range); 
        } 
        catch (DateTimeException e) { 
            System.out.println( 
                "passed parameter can"
                + " not form a date"); 
            System.out.println( 
                "Exception thrown:" + e); 
        } 
    } 
}

输出：

Equivalent Range:0 - 1

范例2：

// Java program to demonstrate 
// range() method 
  
import java.util.*; 
import java.io.*; 
import java.time.*; 
import java.time.chrono.*; 
import java.time.temporal.*; 
  
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 the ValueRange for 
            // given ChronoField 
            // by using range() method 
            ValueRange range 
                = crono.range( 
                    ChronoField.YEAR); 
  
            // display the result 
            System.out.println( 
                "Equivalent Range:"
                + range); 
        } 
        catch (DateTimeException e) { 
            System.out.println( 
                "passed parameter can"
                + " not form a date"); 
            System.out.println( 
                "Exception thrown:" + e); 
        } 
    } 
}

输出：

Equivalent Range:-999999999 - 999999999

参考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#range-java.time.temporal.ChronoField-

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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 range() 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。