Java YearMonth withYear()用法及代碼示例

YearMonth類的withYear(int year)方法用於使用傳遞的Year來更改YearMonth對象的年份，此方法之後將返回更改後的YearMonth的副本。此實例是不可變的，不受此方法調用的影響。

用法:

public YearMonth withYear(int year)

參數：此方法接受月份作為參數，該年份是在從MIN_YEAR到MAX_YEAR的返回year-month中設置的年份。

返回值：此方法基於此year-month和所請求的年份返回YearMonth。

異常：如果年份值無效，則此方法引發DateTimeException。

以下示例程序旨在說明withYear()方法：
示例1:

// Java program to demonstrate 
// YearMonth.withYear() 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 withYear method of YearMonth class 
        YearMonth updatedlocal = yr.withYear(2023); 
  
        // print instance 
        System.out.println("YearMonth after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

輸出：

YearMonth before applying method: 2019-12
YearMonth after applying method: 2023-12

示例2:

// Java program to demonstrate 
// YearMonth.withYear() 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 withYear method of YearMonth class 
        YearMonth updatedlocal = yr.withYear(1992); 
  
        // print instance 
        System.out.println("YearMonth after"
                           + " applying method: "
                           + updatedlocal); 
    } 
}

輸出：

YearMonth before applying method: 2022-07
YearMonth after applying method: 1992-07

參考文獻： https://docs.oracle.com/javase/10/docs/api/java/time/YearMonth.html#withYear(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 YearMonth withYear() 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。