Java YearMonth withMonth()用法及代码示例

YearMonth类的withMonth(int month)方法用于使用传递的month来更改YearMonth对象的month-of-year，然后该方法返回更改后的YearMonth的副本。如果day-of-month对于指定的月份无效，则将调整日期到最后一个有效的day-of-month。此实例是不可变的，不受此方法调用的影响。

用法:

public YearMonth withMonth(int month)

参数：此方法接受月份作为参数，即month-of-year，以将其设置在返回的year-month中，从1月(1月)到12月(12月)。

返回值：此方法返回基于此year-month的YearMonth以及所请求的月份。

异常：如果month-of-year值无效，则此方法引发DateTimeException。

以下示例程序旨在说明withMonth()方法：
示例1:

// Java program to demonstrate 
// YearMonth.withMonth() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a YearMonth object 
        YearMonth yr 
            = YearMonth.of(2019, 12); 
  
        // print instance 
        System.out.println("YearMonth before"
                           + " applying method: "
                           + yr); 
  
        // apply withMonth method of YearMonth class 
        YearMonth updatedlocal = yr.withMonth(1); 
  
        // print instance 
        System.out.println("YearMonth after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

输出：

YearMonth before applying method: 2019-12
YearMonth after applying method: 2019-01

示例2:

// Java program to demonstrate 
// YearMonth.withMonth() method 
  
import java.time.*; 
import java.time.temporal.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create a YearMonth object 
        YearMonth yr 
            = YearMonth.of(2022, 7); 
  
        // print instance 
        System.out.println("YearMonth before"
                           + " applying method: "
                           + yr); 
  
        // apply withMonth method of YearMonth class 
        YearMonth updatedlocal = yr.withMonth(12); 
  
        // print instance 
        System.out.println("YearMonth after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

输出：

YearMonth before applying method: 2022-07
YearMonth after applying method: 2022-12

参考文献： https://docs.oracle.com/javase/10/docs/api/java/time/YearMonth.html#withMonth(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 YearMonth withMonth() 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。