Java WeekFields weekOfYear()用法及代码示例

WeekFields类的weekOfYear()方法用于返回一个字段，以基于此WeekFields访问一年中的星期。例：

如果一年的第一天是星期一，则第一周从第一天开始，没有零周
如果一年的第二天是星期一，则第一周从第二天开始，而第一天在零周
如果一年中的第4天是星期一，则第1周从第4周开始，第1至第3周在零周开始
如果一年中的第5天是星期一，则第二周从第5周开始，第1至第4周在第1周

该字段可用于任何日历系统。

用法:

public TemporalField weekOfYear()

参数：此方法不接受任何内容。

返回值：此方法返回一个提供对week-of-year的访问权限的字段，而不是null。

以下示例程序旨在说明WeekFields.weekOfYear()方法：
程序1:

// Java program to demonstrate 
// WeekFields.weekOfYear() method 
  
import java.time.DayOfWeek; 
import java.time.LocalDate; 
import java.time.temporal.TemporalField; 
import java.time.temporal.WeekFields; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create WeekFields 
        WeekFields weekFields 
            = WeekFields.of(DayOfWeek.MONDAY, 1); 
  
        // apply weekOfYear() 
        TemporalField weekOfYear 
            = weekFields.weekOfYear(); 
  
        // create a LocalDate 
        LocalDate day 
            = LocalDate.of(2021, 12, 21); 
  
        // get week of year for localdate 
        int wow = day.get(weekOfYear); 
  
        // print results 
        System.out.println("Week of year for "
                           + day + ":" + wow); 
    } 
}

输出：

Week of year for 2021-12-21:52

程序2:

// Java program to demonstrate 
// WeekFields.weekOfYear() method 
  
import java.time.DayOfWeek; 
import java.time.LocalDate; 
import java.time.temporal.TemporalField; 
import java.time.temporal.WeekFields; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
  
        // create WeekFields 
        WeekFields weekFields 
            = WeekFields.of(DayOfWeek.SUNDAY, 1); 
  
        // apply weekOfYear() 
        TemporalField weekOfYear 
            = weekFields.weekOfYear(); 
  
        // create a LocalDate 
        LocalDate day = LocalDate.of(2014, 10, 12); 
  
        // get week of year for localdate 
        int wow = day.get(weekOfYear); 
  
        // print results 
        System.out.println("Week of year for "
                           + day + ":" + wow); 
    } 
}

输出：

Week of year for 2014-10-12:42

参考：https：//docs.oracle.com/javase/10/docs/api/java/time/temporal/WeekFields.html#weekOfYear()

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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 WeekFields weekOfYear() 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。