Java中的 JapaneseChronology range() 方法与示例

Java.time.chrono.JapaneseChronology类的range()方法用于从 chrono 类型的指定字段中获取范围。

句法：

public ValueRange range(ChronoField field)

参数：该方法将ChronoField类型的字段作为参数。

返回值：此方法返回时间类型的指定字段的范围。

以下是说明range()方法的示例：

示例 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();
  
            // getting JapaneseChronology
            // used in LocalDate
            JapaneseChronology 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 : -1 - 2

示例 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
            // JapaneseDate Object
            JapaneseDate hidate
                = JapaneseDate.now();
  
            // getting JapaneseChronology
            // used in LocalDate
            JapaneseChronology 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 : 1873 - 999999999

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