Java DayOfWeek get()用法及代码示例

java.time.DayOfWeek的get()方法是Java中的一个内置函数，它以TemporalField作为参数，并从此day-of-week中获取指定字段的值作为int。 TemporalField是日期时间字段，例如month-of-year或hour-of-minute。日期和时间使用此类字段表示。如果该字段是DAY_OF_WEEK，则将返回day-of-week的值(从1到7)。所有其他ChronoField实例将引发UnsupportedTemporalTypeException。 int值遵循ISO-8601标准，从1(星期一)到7(星期日)。

方法声明：

public int get(TemporalField field);

用法:

int val = DayOfWeekObject.get(TemporalField field);

参数：此方法将field作为参数，其中：

field –是类似Chronafield.DAY_OF_WEEK的时间字段。
DayOfWeekObject–表示DayOfWeek对象。

参数：此方法不接受任何参数。

返回值：该函数返回星期几的int值，例如，星期一为1，星期二为2，依此类推。

以下示例程序旨在说明上述方法：
示例1:

// Java Program Demonstrate get() 
// method of DayOfWeek 
  
import java.time.*; 
import java.time.DayOfWeek; 
import java.time.temporal.ChronoField; 
  
class DayOfWeekExample { 
    public static void main(String[] args) 
    { 
        // Set a local date whose day is found 
        LocalDate localDate 
            = LocalDate.of(1947, 
                           Month.AUGUST, 15); 
  
        // Find the day from the local date 
        DayOfWeek dayOfWeek 
            = DayOfWeek.from(localDate); 
  
        // Printing the day of the week 
        // and its Int value 
        System.out.println("Day of the Week on "
                           + localDate + " - "
                           + dayOfWeek.name()); 
  
        int val 
            = dayOfWeek.get(ChronoField.DAY_OF_WEEK); 
  
        System.out.println("Int Value of "
                           + dayOfWeek.name() 
                           + " - " + val); 
    } 
}

输出：

Day of the Week on 1947-08-15 - FRIDAY
Int Value of FRIDAY - 5

示例2:

// Java Program Demonstrate get() 
// method of DayOfWeek 
import java.time.*; 
import java.time.DayOfWeek; 
import java.time.temporal.ChronoField; 
  
class DayOfWeekExample { 
    public static void main(String[] args) 
    { 
        // Set a local date whose day is found 
        LocalDate localDate 
            = LocalDate.of(2015, 
                           Month.JULY, 13); 
  
        // Find the day from the local date 
        DayOfWeek dayOfWeek 
            = DayOfWeek.from(localDate); 
  
        // Printing the day of the week 
        // and its Int value 
        System.out.println("Day of the Week on "
                           + localDate + " - "
                           + dayOfWeek.name()); 
  
        int val 
            = dayOfWeek.get(ChronoField.DAY_OF_WEEK); 
  
        System.out.println("Int Value of "
                           + dayOfWeek.name() 
                           + " - " + val); 
    } 
}

输出：

Day of the Week on 2015-07-13 - MONDAY
Int Value of MONDAY - 1

参考： https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#get-java.time.temporal.TemporalField-

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