Java DayOfWeek getValue()方法及示例

java.time.DayOfWeek 的 getValue() 方法是Java中的一个内置函数，用于返回分配给一周7天的整数值，即星期一、星期二、星期三、星期四、星期五、星期六和星期日。该整数值遵循ISO-8601标准，从1（周一）到7（周日）。

方法声明 。

public int getValue()

语法

int val = DayOfWeekObject.getValue()

参数。这个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，1代表星期一，2代表星期二，以此类推。

下面的程序说明了上述方法：

程序 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);
    }
}

输出:

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

程序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);
    }
}

输出:

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

参考资料: https://docs.oracle.com/javase/8/docs/api/java/time/DayOfWeek.html#getValue-