Java IsoChronology range()用法及代碼示例

java.time.chrono.IsoChronology類的range()方法用於從ChronoField類型的指定字段獲取範圍。

用法:

public ValueRange range(ChronoField field)

參數：此方法將ChronoField類型的字段作為參數。

返回值：此方法從chrono類型的指定字段返回範圍。

下麵是說明range()方法的示例：

範例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); 
        } 
    } 
}

輸出：

Equivalent Range:0 - 1

範例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); 
        } 
    } 
}

輸出：

Equivalent Range:-999999999 - 999999999

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

相關用法

注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 IsoChronology range() 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。