Chapter 5 Exercise 29, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

**5.29 (Display calendars) Write a program that prompts the user to enter the year and first day of the year and displays the calendar table for the year on the console. For example, if the user entered the year 2013, and 2 for Tuesday, January 1, 2013, your program should display the calendar for each month in the year, as follows:

             January 2015
---------------------------------------
Sun   Mon   Tue   Wed   Thu   Fri   Sat  
                        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  

import java.util.Scanner;
 
public class ProgrammingEx5_29 {
 public static void main(String[] args) {
 
  String sMonth, sDay;
 
  Scanner input = new Scanner(System.in);
  // Enter loan amount
  System.out.print("Enter year:");
  int year = input.nextInt();
  System.out.print("Enter day (0 for Sunday, 1 for Monday and so on):");
  int day = input.nextInt();
  // Going through each month
  for (int month = 1; month <= 12; month++) {
 
   // Processing month
 
   switch (month) {
   case 1:
    sMonth = "January";
    break;
   case 2:
    sMonth = "February";
    break;
   case 3:
    sMonth = "March";
    break;
   case 4:
    sMonth = "April";
    break;
   case 5:
    sMonth = "May";
    break;
   case 6:
    sMonth = "June";
    break;
   case 7:
    sMonth = "July";
    break;
   case 8:
    sMonth = "August";
    break;
   case 9:
    sMonth = "September";
    break;
   case 10:
    sMonth = "October";
    break;
   case 11:
    sMonth = "November";
    break;
   case 12:
    sMonth = "December";
    break;
   default:
    sMonth = "";
   }
 
   // Printing month and day heading
   // Spaces calculated form length of the month string to make it
   // center. 34 is the line length.
   System.out.printf("%" + (34 + sMonth.length()) / 2 + "s %s\n",
     sMonth, year);
   System.out.println(String.format("%39S", "").replace(' ', '-'));
   System.out.printf("%-6s%-6s%-6s%-6s%-6s%-6s%-6s\n", "Sun", "Mon",
     "Tue", "Wed", "Thu", "Fri", "Sat");
 
   // calculating number of days
   int length = 30 + ((month + (int) (month / 8.0)) % 2);
   if (month == 2) {
    if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
     length = 29;
    } else {
     length = 28;
    }
   }
   day = (day) % 7;
 
   switch (day) {
   case 0:
    sDay = "Sunday";
    break;
   case 1:
    sDay = "Monday";
    break;
   case 2:
    sDay = "Tuesday";
    break;
   case 3:
    sDay = "Wednesday";
    break;
   case 4:
    sDay = "Thursday";
    break;
   case 5:
    sDay = "Friday";
    break;
   case 6:
    sDay = "Saturday";
    break;
   default:
    sDay = "";
   }
   // Calculating day
 
   // Print spaces before the 1st of each month
   if (day != 0) {
    System.out.print(String.format("%" + 6 * day + "s", ""));
   }
 
   // Loop to print date
 
   for (int i = 1; i <= length; i++) {
    System.out.printf("%-6d", i);
 
    // print new line after Saturday
    if (day % 7 == 6) {
     System.out.println("");
    }
    day += 1;
   }
   // print new line at the end of each month
   System.out.println("");
 
  }
 }
}