Java IsoChronology date(int, int, int)用法及代码示例

java.time.chrono.IsoChronology类的date()方法用于根据ISO日历系统获取给定年，月和日的本地日期。

用法:

public LocalDate date(int prolepticYear,
                      int month,
                      int dayOfMonth)

参数：此方法采用以下参数作为参数。

prolepticYear:ISO年份字段的整数预测年份
month:ISO的month字段的整数month
day:ISO的天字段的整数天

返回值：此方法根据Iso日历系统返回给定年，月和日的本地日期。

异常：如果日，月和年的给定字段无法形成结构化日期，则此方法将引发DateTimeException。

下面是说明date()方法的示例：

范例1：

// Java program to demonstrate 
// date() 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 lodate = LocalDate.now(); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = lodate.getChronology(); 
  
            // getting LocalDate for the 
            // given date, month and year field 
            // by using date() mehtod 
            LocalDate date = crono.date(1440, 05, 24); 
  
            // display the result 
            System.out.println("LocalDate is:" + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed paramter can "
                               + "not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

LocalDate is:1440-05-24

范例2：

// Java program to demonstrate 
// date() 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 lodate = LocalDate.now(); 
  
            // getting IsoChronology used in LocalDate 
            IsoChronology crono = lodate.getChronology(); 
  
            // getting LocalDate for the 
            // given date, month and year field 
            // by using date() mehtod 
            LocalDate date = crono.date(2020, 05, 34); 
  
            // display the result 
            System.out.println("LocalDate is:" + date); 
        } 
        catch (DateTimeException e) { 
            System.out.println("passed paramter can "
                               + "not form a date"); 
            System.out.println("Exception thrown:" + e); 
        } 
    } 
}

输出：

passed paramter can not form a date
Exception thrown:java.time.DateTimeException:Invalid value for DayOfMonth (valid values 1 - 28/31):34

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