calenday java implementating

Calendar.java

public class Calendar
{
    public static boolean isLeapYear(int year)
    {
	if((year % 4 ==0 && year % 100 != 0) || (year % 400 == 0))
	    return true;
	return false;
    }
    public static String getMonth(int month)
    {
	String[] m = {"", "January", "Febuary", "March",
			  "April", "May", "June", "July", 
			  "August", "Setempter", "October", "November", "December"};
	return m[month];
    }
    public static int getDays(int month, int year)
    {
	int[] d = { 0 , 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
	if(isLeapYear(year))
	    d[2] = 29;
	return d[month];
    }
    public static int getDay(int m, int d, int y)
    {
	int y0 = y - (14-m)/12;
	int x = y0 + y0/4 - y0/100 + y0/400;
	int m0 = m + 12 * ((14-m)/12 - 2);
	int d0 = (d + x + (31 * m0)/12) % 7;
	return d0;
    }
    public static void showTitle(String[] days)
    {
	for(int i = 0; i < days.length; i++)
	    StdOut.printf("%2s ", days[i]);
	StdOut.println();
    }
    public static void main(String[] args)
    {
	int month = Integer.parseInt(args[0]);
	int year = Integer.parseInt(args[1]);
	String[] days = {" S", " M", "Tu", " W", "Th", " F", " S"};
	String m = getMonth(month);
	StdOut.println(m + "  " + year);
	showTitle(days);
	int day = getDay(month, 1, year);

	int count = 0;
	for(int i = 0; i < day; i++)
	    {
		StdOut.print("   ");
		count++;
	    }
	for(int i = 1; i <= getDays(month, year); i++)
	    {
		
		StdOut.printf("%2d ", i);
		count++;
		if(count % 7 == 0)
		    StdOut.println();
	    }
	StdOut.println();

	
    }
}