Java MonthDay withDayOfMonth()用法及代码示例

MonthDay类的withDayOfMonth(int dayOfMonth)方法用于将传递的dayOfMonth用作参数来更改MonthDay对象的day-of-month，然后该方法返回更改后的MonthDay的副本。如果day-of-month值在指定的月份后无效，则抛出异常改变操作。

用法:

public MonthDay withDayOfMonth(int dayOfMonth)

参数：此方法接受dayOfMonth作为参数，该参数是要在返回的month-day中设置的day-of-month(从1到31)。

返回值：此方法基于此month-day和所请求的日期返回MonthDay。

异常：如果day-of-month值无效，或者当day-of-month在月份中无效，则此方法引发DateTimeException。

以下示例程序旨在说明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); 
    } 
}

输出：

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); 
    } 
}

输出：

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

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

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 MonthDay withDayOfMonth() Method in Java with Examples。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。