Java DayOfWeek getValue()用法及代碼示例

java.time.DayOfWeek的getValue()方法是Java中的內置函數，它返回分配給一周中7天(即星期一，星期二，星期三，星期三，星期四，星期五，星期六和星期日)的整數值。 int值遵循ISO-8601標準，從1(星期一)到7(星期日)。

方法聲明：

public int getValue()

用法:

int val = DayOfWeekObject.getValue()

參數：此方法不接受任何參數。

返回值：該函數返回星期幾的int值，例如，星期一為1，星期二為2，依此類推。

以下示例程序旨在說明上述方法：
示例1:

// Java Program Demonstrate getValue() 
// method of DayOfWeek 
import java.time.*; 
import java.time.DayOfWeek; 
  
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"
                           + " 15th August 1947 - "
                           + dayOfWeek.name()); 
  
        int val = dayOfWeek.getValue(); 
  
        System.out.println("Int Value of "
                           + dayOfWeek.name() 
                           + " - " + val); 
    } 
}

輸出：

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

示例2:

// Java Program Demonstrate getValue() 
// method of DayOfWeek 
import java.time.*; 
import java.time.DayOfWeek; 
  
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"
                           + " 13th July 2015 - "
                           + dayOfWeek.name()); 
  
        int val = dayOfWeek.getValue(); 
  
        System.out.println("Int Value of "
                           + dayOfWeek.name() 
                           + " - " + val); 
    } 
}

輸出：

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

參考： https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#getValue–

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注：本文由純淨天空篩選整理自rupesh_rao大神的英文原創作品 DayOfWeek getValue() 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。