Java IsoChronology date(int, int, int)用法及代碼示例

java.time.chrono.IsoChronology類的date()方法用於根據ISO日曆係統獲取給定年，月和日的本地日期。

用法:

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

參數：此方法采用以下參數作為參數。

prolepticYear:ISO年份字段的整數預測年份
month:ISO的month字段的整數month
day:ISO的天字段的整數天

返回值：此方法根據Iso日曆係統返回給定年，月和日的本地日期。

異常：如果日，月和年的給定字段無法形成結構化日期，則此方法將引發DateTimeException。

下麵是說明date()方法的示例：

範例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); 
        } 
    } 
}

輸出：

LocalDate is:1440-05-24

範例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); 
        } 
    } 
}

輸出：

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

參考： https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#date-int-int-int-

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