Print a month page. Only works for the Western calendar. Java code example - Click here to copy ->>>

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Code:



 

/*

 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.

 * All rights reserved. Software written by Ian F. Darwin and others.

 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $

*/





import java.util.*;

import java.text.*;



/** Print a month page.

 * Only works for the Western calendar.

 * @author   Ian F. Darwin, http://www.darwinsys.com/

 * @version $Id: CalendarPage.java,v 1.7 2004/03/07 03:19:41 ian Exp $

 */

public class CalendarPage {



   /** The names of the months */

   String[] months = {

      "January", "February", "March", "April",

      "May", "June", "July", "August",

      "September", "October", "November", "December"

   };



   /** The days in each month. */

   public final static int[] dom = {

         31, 28, 31, 30,   /* jan feb mar apr */

         31, 30, 31, 31, /* may jun jul aug */

         30, 31, 30, 31   /* sep oct nov dec */

   };



   /** Compute which days to put where, in the Cal panel */

   public void print(int mm, int yy) {

      /** The number of days to leave blank at the start of this month */

      int leadGap = 0;



      System.out.print(months[mm]);      // print month and year

      System.out.print(" ");

      System.out.print(yy);

      System.out.println();



      if (mm < 0 || mm > 11)

         throw new IllegalArgumentException("Month " + mm + " bad, must be 0-11");

      GregorianCalendar calendar = new GregorianCalendar(yy, mm, 1);



      System.out.println("Su Mo Tu We Th Fr Sa");



      // Compute how much to leave before the first.

      // get(DAY_OF_WEEK) returns 0 for Sunday, which is just right.

      leadGap = calendar.get(Calendar.DAY_OF_WEEK)-1;



      int daysInMonth = dom[mm];

      if (calendar.isLeapYear(calendar.get(Calendar.YEAR)) && mm == 1)

         ++daysInMonth;



      // Blank out the labels before 1st day of month

      for (int i = 0; i < leadGap; i++) {

         System.out.print("   ");

      }



      // Fill in numbers for the day of month.

      for (int i = 1; i <= daysInMonth; i++) {



         // This "if" statement is simpler than fiddling with NumberFormat

         if (i<=9)

            System.out.print(' ');

         System.out.print(i);



         if ((leadGap + i) % 7 == 0)      // wrap if end of line.

            System.out.println();

         else

            System.out.print(' ');

      }

      System.out.println();

   }



   /** For testing, a main program */

   public static void main(String[] av) {

      int month, year;



      CalendarPage cp = new CalendarPage();



      // print the current month.

      if (av.length == 2) {

         cp.print(Integer.parseInt(av[0])-1, Integer.parseInt(av[1]));

      } else {

         Calendar c = Calendar.getInstance();

         cp.print(c.get(Calendar.MONTH), c.get(Calendar.YEAR));

      }

   }

}