Java java.time.temporal.WeekFields用法及代码示例

WeekFields类代表星期的定义，提供TemporalField实例。 WeekFields 提供五个字段：weekOfYear()、weekOfMonth()、dayOfWeek()、weekOfWeekBasedYear() 和 weekBasedYear()，它们提供对任何时间对象的值的访问。

每个不同的 WeekFields 都需要一个单独的 Field 实例，并且需要：

一周开始
最少天数

类声明：

public final class WeekFields
extends Object
implements Serializable

WeekFields类继承以下方法 来自 java.lang.Object 类：

clone()
finalize()
getClass()
notify()
notifyAll()
wait()

WeekFields类的方法：

方法	说明
dayOfWeek()	此方法返回一个字段，用于根据此 WeekFields 访问星期几。
equals(Object object)	此方法检查此WeekFields是否等于指定的对象。
getFirstDayOfWeek()	此方法获取第一个day-of-week。
getMinimalDaysInFirstWeek()	此方法在第一周获得最少的天数。
hashCode()	此方法返回此 WeekFields 的哈希代码。
of(DayOfWeek firstDayOfWeek, int minimalDaysInFirstWeek)	此方法从第一个 day-of-week 和最少天数中获取 WeekFields 的实例。
of(Locale locale)	此方法获取适合区域设置的 WeekFields 实例。
toString()	此方法获取此 WeekFields 实例的字符串表示形式。
weekBasedYear()	此方法返回一个字段，用于根据此 WeekFields 访问 week-based-year 的年份。
weekOfMonth()	此方法返回一个字段，用于根据此 WeekFields 访问月份中的第几周。
weekOfWeekBasedYear()	此方法返回一个字段，用于根据此 WeekFields 访问 week-based-year 的周。
weekOfYear()	此方法返回一个字段，用于根据此 WeekFields 访问一年中的第几周。

示例 1：

Java


// Java program to demonstrate 
// WeekFields class 
  
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); 
  
        // creating separate temporal fields for each method 
  
        // apply dayOfWeek() 
        TemporalField dayOfWeek = weekFields.dayOfWeek(); 
  
        // apply weekBasedYear() 
        TemporalField weekBasedYear 
            = weekFields.weekBasedYear(); 
  
        // apply weekOfMonth() 
        TemporalField weekOfMonth 
            = weekFields.weekOfMonth(); 
  
        // apply weekOfWeekBasedYear() 
        TemporalField weekOfWeekBasedYear 
            = weekFields.weekOfWeekBasedYear(); 
  
        // create a LocalDate 
        LocalDate day = LocalDate.of(2021, 03, 31); 
  
        // get day of week for localdate 
        int dow = day.get(dayOfWeek); 
  
        // get week based year for localdate 
        int wby = day.get(weekBasedYear); 
  
        // get week of month for localdate 
        int wom = day.get(weekOfMonth); 
  
        // get week of week for localdate 
        int wow = day.get(weekOfWeekBasedYear); 
  
        // print results 
  
        System.out.println("day of week for " + day + " :"
                           + dow); 
        System.out.println("week based year for " + day 
                           + " :" + wby); 
        System.out.println("week of month for " + day + " :"
                           + wom); 
        System.out.println("Week of week for " + day + " :"
                           + wow); 
    } 
}

输出

day of week for 2021-03-31 :3
week based year for 2021-03-31 :2021
week of month for 2021-03-31 :5
Week of week for 2021-03-31 :14

示例 2：

Java


// Java program to demonstrate 
// WeekFields class 
  
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); 
  
        // creating separate temporal fields for each method 
  
        // apply dayOfWeek() 
        TemporalField dayOfWeek = weekFields.dayOfWeek(); 
  
        // apply weekBasedYear() 
        TemporalField weekBasedYear 
            = weekFields.weekBasedYear(); 
  
        // apply weekOfMonth() 
        TemporalField weekOfMonth 
            = weekFields.weekOfMonth(); 
  
        // apply weekOfWeekBasedYear() 
        TemporalField weekOfWeekBasedYear 
            = weekFields.weekOfWeekBasedYear(); 
  
        // create a LocalDate 
        LocalDate day = LocalDate.of(2021, 12, 05); 
  
        // get day of week for localdate 
        int dow = day.get(dayOfWeek); 
  
        // get week based year for localdate 
        int wby = day.get(weekBasedYear); 
  
        // get week of month for localdate 
        int wom = day.get(weekOfMonth); 
  
        // get week of week for localdate 
        int wow = day.get(weekOfWeekBasedYear); 
  
        // print results 
  
        System.out.println("day of week for " + day + " :"
                           + dow); 
        System.out.println("week based year for " + day 
                           + " :" + wby); 
        System.out.println("week of month for " + day + " :"
                           + wom); 
        System.out.println("Week of week for " + day + " :"
                           + wow); 
    } 
}

输出

day of week for 2021-12-05 :1
week based year for 2021-12-05 :2021
week of month for 2021-12-05 :2
Week of week for 2021-12-05 :50

相关用法

注：本文由纯净天空筛选整理自surbhityagi15大神的英文原创作品 java.time.temporal.WeekFields Class in Java。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。