Challenge 3 Java Programming 2017

public class Calendar
{
    public static void main(String [] args)
    {
        System.out.println("  Sun    Mon    Tue    Wed    Thu    Fri    Sat  ");
        headers();
        cal(31, 6);
        headers();
    }
    public static void headers()
    {
        System.out.println("+------+------+------+------+------+------+------+");
    }
    public static String padded(int n, int width)
    {
        String s= "" + n;
        for (int i = s.length(); i < width; i++)
        {
            s = " " + s;
        }
        return s;
    }
    public static void cal(int days, int sun)
    {
        int printdays = 1;
        int weekday = 1;
        while(printdays <= days)
        {
            if (weekday == (8 - sun) % 7 + 1 && printdays == 1)
            {
                System.out.print("|" + padded(printdays, 6));
                printdays++;
            }
            else if(weekday < (8 - sun) % 7 + 1 && printdays == 1)
            {
                System.out.print("|      ");
            }
            else if(printdays > 1)
            {
                System.out.print("|" + padded(printdays, 6));
                printdays++;
            }
            weekday++;
            if(weekday > 7)
            {
                System.out.println("|");
                weekday = 1;
            }
        }
        if(weekday != 1)
        {
            for(; weekday <= 7; weekday++)
            {
            System.out.print("|      ");
        }
        System.out.println("|");
    }
    }
}