Java中的 DayOfWeek of() 方法及示例

Java .time.DayOfWeek的of()方法是Java中的一个内置函数，它从 int 值返回 DayOfWeek 的实例。 int 值的范围在 1（星期一）到 7（星期日）之间。

方法声明：

public static DayOfWeek of(int dayOfWeek)

句法：

DayOfWeek dayOfWeekObject = DayOfWeek.of(int dayOfWeek)

参数：此方法以 dayOfWeek 作为参数，其中：

• dayOfWeek – 是从 1（星期一）到 7（星期日）的 int 值。
• dayOfWeekObject – 是 DayOfWeek 对象的一个实例。

返回值：函数返回 DayOfWeek 对象的一个实例。

下面的程序说明了上述方法：
方案一：

// Java Program Demonstrate of()
// method of DayOfWeek
import java.time.DayOfWeek;
  
class DayOfWeekExample {
    public static void main(String[] args)
    {
        // Getting an instance of DayOfWeek from int value
        DayOfWeek dayOfWeek = DayOfWeek.of(4);
  
        // Printing the day of the week
        // and its Int value
        System.out.println("Day of the Week - "
                           + dayOfWeek.name());
        System.out.println("Int Value of "
                           + dayOfWeek.name() + " - "
                           + dayOfWeek.getValue());
    }
}

输出：

Day of the Week - THURSDAY
Int Value of THURSDAY - 4

方案二：

// Java Program Demonstrate of()
// method of DayOfWeek
import java.time.DayOfWeek;
  
class DayOfWeekExample {
    public static void main(String[] args)
    {
        // Getting an instance of DayOfWeek from int value
        DayOfWeek dayOfWeek = DayOfWeek.of(7);
  
        // Printing the day of the week
        // and its Int value
        System.out.println("Day of the Week - "
                           + dayOfWeek.name());
        System.out.println("Int Value of "
                           + dayOfWeek.name() + " - "
                           + dayOfWeek.getValue());
    }
}

输出：

Day of the Week - SUNDAY
Int Value of SUNDAY - 7

参考： https: Java/time/DayOfWeek.html#of-int-