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I think that's what you need./************************************************************************
* Compilation: javac Calendar.java
* Execution: java Calendar M Y
*
* This program takes the month M and year Y and prints a
* calendar for that month.
*
* % java Calendar 7 2005
* July 2005
* S M T W Th F S
* 1 2
* 3 4 5 6 7 8 9
* 10 11 12 13 14 15 16
* 17 18 19 20 21 22 23
* 24 25 26 27 28 29 30
* 31
*
************************************************************************/
public class Calendar {
/***************************************************************************
* Given the month (M), day (D), and year (Y), return which day
* of the week it falls on according to the Gregorian calendar.
* For M use 1 for January, 2 for February, and so forth. Outputs
* 0 for Sunday, 1 for Monday, and so forth.
**************************************************************************/
public static int day(int M, int D, int Y) {
int y = Y - (14 - M) / 12;
int x = y + y/4 - y/100 + y/400;
int m = M + 12 * ((14 - M) / 12) - 2;
int d = (D + x + (31m)/12) % 7;
return d;
}
// return true if the given year is a leap year
public static boolean isLeapYear(int year) {
if ((year % 4 == 0) && (year % 100 != 0)) return true;
if (year % 400 == 0) return true;
return false;
}
public static void main(String[] args) {
int M = Integer.parseInt(args[0]); // month (Jan = 1, Dec = 12)
int Y = Integer.parseInt(args[1]); // year
// months[i] = name of month i
String[] months = {
"", // leave empty so that months[1] = "January"
"January", "February", "March",
"April", "May", "June",
"July", "August", "September",
"October", "November", "December"
};
// days[i] = number of days in month i
int[] days = {
0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
// check for leap year
if (M == 2 && isLeapYear(Y)) days[M] = 29;
// print calendar header
StdOut.println(" " + months[M] + " " + Y);
StdOut.println(" S M Tu W Th F S");
// starting day
int d = day(M, 1, Y);
// print the calendar
for (int i = 0; i < d; i++)
StdOut.print(" ");
for (int i = 1; i <= days[M]; i++) {
StdOut.printf("%2d ", i);
if (((i + d) % 7 == 0) || (i == days[M])) StdOut.println();
}
}
}
