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Java LocalDate withDayOfMonth()用法及代碼示例


Java中LocalDate類的withDayOfMonth()方法返回已更改day-of-month的此LocalDate的副本。

用法:

public LocalDate withDayOfMonth(int dayOfMonth)

參數:此方法接受強製性參數dayOfMonth,其中day-of-month可以在1到28-31之間設置結果。


返回值:該函數基於此日期和所請求的日期返回LocalDate,而不是null。

異常:當月份中的日期值無效時,該函數將引發DateTimeException。

以下示例程序旨在說明LocalDate.withDayOfMonth()方法:

示例1:

// Program to illustrate the withDayOfMonth() method 
  
import java.util.*; 
import java.time.*; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
  
        // Parses the date 
        LocalDate dt1 = LocalDate.parse("2018-12-07"); 
        LocalDate result = dt1.withDayOfMonth(01); 
  
        // Prints the date with year 
        System.out.println("The date with day of the month is: " + result); 
    } 
}
輸出:
The date with day of the month is: 2018-12-01

示例2:

// Program to illustrate the withDayOfMonth() method 
// Exceptions 
import java.util.*; 
import java.time.*; 
import java.time.temporal.ChronoField; 
  
public class GfG { 
    public static void main(String[] args) 
    { 
  
        try { 
            // Parses the date 
            LocalDate dt1 = LocalDate.parse("2018-12-07"); 
            LocalDate result = dt1.withDayOfMonth(35); 
  
            // Prints the date with year 
            System.out.println("The date with day of the month is: " + result); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}
輸出:
java.time.DateTimeException: Invalid value for DayOfMonth (valid values 1 - 28/31): 35

參考: https://docs.oracle.com/javase/10/docs/api/java/time/LocalDate.html#withDayOfMonth(int)



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注:本文由純淨天空篩選整理自gopaldave大神的英文原創作品 LocalDate withDayOfMonth() method in Java with Examples。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。