Java MonthDay withDayOfMonth()用法及代碼示例

MonthDay類的withDayOfMonth(int dayOfMonth)方法用於將傳遞的dayOfMonth用作參數來更改MonthDay對象的day-of-month，然後該方法返回更改後的MonthDay的副本。如果day-of-month值在指定的月份後無效，則拋出異常改變操作。

用法:

public MonthDay withDayOfMonth(int dayOfMonth)

參數：此方法接受dayOfMonth作為參數，該參數是要在返回的month-day中設置的day-of-month(從1到31)。

返回值：此方法基於此month-day和所請求的日期返回MonthDay。

異常：如果day-of-month值無效，或者當day-of-month在月份中無效，則此方法引發DateTimeException。

以下示例程序旨在說明withDayOfMonth()方法：
示例1:

// Java program to demonstrate 
// MonthDay.withDayOfMonth() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a MonthDay object 
        MonthDay monthday 
            = MonthDay.of(8, 28); 
  
        // print instance 
        System.out.println("MonthDay before"
                           + " applying method: "
                           + monthday); 
  
        // apply withDayOfMonth method 
        // of MonthDay class 
        MonthDay updatedlocal 
            = monthday.withDayOfMonth(21); 
  
        // print instance 
        System.out.println("MonthDay after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

輸出：

MonthDay before applying method: --08-28
MonthDay after applying method: --08-21

示例2:

// Java program to demonstrate 
// MonthDay.withDayOfMonth() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a MonthDay object 
        MonthDay monthday 
            = MonthDay.of(10, 31); 
  
        // print instance 
        System.out.println("MonthDay before"
                           + " applying method: "
                           + monthday); 
  
        // apply withDayOfMonth method 
        // of MonthDay class 
        MonthDay updatedlocal 
            = monthday.withDayOfMonth(12); 
  
        // print instance 
        System.out.println("MonthDay after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

輸出：

MonthDay before applying method: --10-31
MonthDay after applying method: --10-12

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

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注：本文由純淨天空篩選整理自AmanSingh2210大神的英文原創作品 MonthDay 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。