Introduction

In this blog, we will learn how to get started with Monthly Calendar Program in Java.

Software Requirement

JAVA, NOTEPAD.
  1. import java.util.*;
  2. import java.text.*;
  4. public class MonthCalender {
  6. public final static String[] monthcalender = {
  7. "January",
  8. "February",
  9. "March",
  10. "April",
  11. "May",
  12. "June",
  13. "July",
  14. "August",
  15. "September",
  16. "October",
  17. "November",
  18. "December"
  19. };
  21. public final static int daysinmonths[] = {
  22. 31,
  23. 28,
  24. 31,
  25. 30,
  26. 31,
  27. 30,
  28. 31,
  29. 31,
  30. 30,
  31. 31,
  32. 30,
  33. 31
  34. };
  36. private void displayMonth(int month, int year) {
  38. int blankdays = 0;
  39. System.out.println(" " + monthcalender[month] + " " + year);
  41. if (month < 0 || month > 11) {
  42. throw new IllegalArgumentException(
  43. "Month " + month + " It is not valid and must lie in between 0 and 11");
  44. }
  46. GregorianCalendar cldr = new GregorianCalendar(year, month, 1);
  47. System.out.println("Sunday Monday Tuesday Wednesday Thursday Friday Saturday");
  50. blankdays = cldr.get(Calendar.DAY_OF_WEEK) - 1;
  51. int daysInMonth = daysinmonths[month];
  53. if (cldr.isLeapYear(cldr.get(Calendar.YEAR)) && month == 1) {
  55. ++daysInMonth;
  56. }
  58. for (int i = 0; i < blankdays; i++) {
  59. System.out.print(" ");
  60. }
  62. for (int i = 1; i <= daysInMonth; i++) {
  64. if (i <= 9) {
  65. System.out.print(" ");
  66. }
  67. System.out.print(i);
  69. if ((blankdays + i) % 7 == 0) {
  70. System.out.println();
  71. } else {
  72. System.out.print(" ");
  73. }
  74. }
  75. }
  77. public static void main(String[] args) {
  79. int mon, yr;
  80. MonthCalender moncldr = new MonthCalender();
  82. if (args.length == 2) {
  83. moncldr.displayMonth(Integer.parseInt(args[0]) - 1, Integer.parseInt(args[1]));
  84. } else {
  85. Calendar todaycldr = Calendar.getInstance();
  86. moncldr.displayMonth(todaycldr.get(Calendar.MONTH), todaycldr.get(Calendar.YEAR));
  87. }
  88. }
  89. }
Output

calender
Monthly Calendar has been created successfully. Feel free to comment with some suggestions.