Java LocalDate withDayOfYear()用法及代码示例

Java中LocalDate类的withDayOfYear()方法返回已更改day-of-year的此LocalDate的副本。

用法:

public LocalDate withDayOfYear(int dayOfYear)

参数：此方法接受必需的参数dayOfYear，该参数指定要在结果中设置的day-of-year，范围为1至365-366。

返回值：该函数基于此日期和所请求的日期返回LocalDate，而不是null。

异常：当day-of-year值无效时，该函数引发DateTimeException。

以下示例程序旨在说明LocalDate.withDayOfYear()方法：

示例1:

// Program to illustrate the withDayOfYear() 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.withDayOfYear(01); 
  
        // Prints the date with year 
        System.out.println("The date with day of year is: " + result); 
    } 
}

输出：

The date with day of year is: 2018-01-01

示例2:

// Program to illustrate the withDayOfYear() 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.withDayOfYear(370); 
  
            // Prints the date with year 
            System.out.println("The date with month is: " + result); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

java.time.DateTimeException: Invalid value for DayOfYear (valid values 1 - 365/366): 370

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

相关用法

注：本文由纯净天空筛选整理自gopaldave大神的英文原创作品 LocalDate withDayOfYear() 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。