Java中的 Calendar getFirstDayOfWeek() 方法及示例

Calendar 类中的getFirstDayOfWeek()方法用于返回此 Calendar 周的第一天。
句法：

public int getFirstDayOfWeek()

参数：该方法不带任何参数。
返回值：该方法返回一周的第一天。
下面的程序说明了 Calendar 类的 getFirstDayOfWeek() 方法的工作：
示例 1：

Java

// Java code to illustrate
// getFirstDayOfWeek() method
 
import java.util.*;
 
public class Calendar_Demo {
    public static void main(String[] args)
    {
 
        // Creating calendar object
        Calendar calndr = Calendar.getInstance();
 
        // Displaying the first
        // day of the week
        System.out.println("The First day"
                           + " is: " + calndr.getFirstDayOfWeek());
 
        int the_day = calndr.getFirstDayOfWeek();
        switch (the_day) {
        case 1:
            System.out.println("Sunday");
            break;
        case 2:
            System.out.println("Monday");
            break;
        case 3:
            System.out.println("Tuesday");
            break;
        case 4:
            System.out.println("Wednesday");
            break;
        case 5:
            System.out.println("Thursday");
            break;
        case 6:
            System.out.println("Friday");
            break;
        case 7:
            System.out.println("Saturday");
            break;
        }
    }
}

输出：

The First day is: 1
Sunday

参考： https: Java/util/Calendar.html#getFirstDayOfWeek()