Month Calendar Generator in Java

I wrote this program to generate month calendar using Java programming ten years ago while learning how to program in Java.

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My email address is the following jakerpomperada@gmail.com, jakerpomperada@aol.com, and jakerpomperada@yahoo.com.

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My telephone number at home here in Bacolod City, Negros Occidental Philippines is  +63 (034) 4335675.

Here in Bacolod City, Negros Occidental I also accepting computer repair, networking and Arduino Project development at a very affordable price.

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Program Listing

 

calendar.java

 

// calendar.java
// author  : Mr. Jake Rodriguez Pomperada, MAED - Instructional Technology
// date    : March 18, 2009 Tuesday 2:05 PM
// tool    : Java
// email   : jakerpomperada@yahoo.com
// tel. no.: +63 034 4335081
//
// program description:
//
// Argument Month and Day Calendar in Java implementation




import java.util.*;

class calendar
{
        public static void main(String arg[])
        {
              GregorianCalendar c1 = new GregorianCalendar();
              int month  = Integer.parseInt(arg[0]);
              int year = Integer.parseInt(arg[1]);
              month = month-1;
              c1.set(year,month,1);
              int day = c1.get(Calendar.DAY_OF_WEEK);
              System.out.println(day);
              int numdays = 0;

        switch(c1.get(Calendar.MONTH))
        {
           case 0:
           case 2:
           case 4:
           case 6:
           case 7:
           case 9:
           case 11:
                numdays = 31;

                break;
           case 1:
                if(c1.isLeapYear(c1.get(Calendar.YEAR)))
                   numdays = 29;
                else
                   numdays = 28;
                   break;
           case 3:
           case 5:
           case 8:
           case 10:
                 numdays = 30;
                 break;
        default:
                System.out.println("ERROR IN MONTH SPECIFICATION");
                break;
       }
       display(day,numdays);

       }
       static void display(int sday , int tday)
         {
              int k = 0;

              System.out.print("\n\n");
              System.out.print("\n=========================================");
               System.out.print("\n    MONTH AND YEAR CALENDAR VERSION 1.0");
              System.out.print("\n=========================================");

              System.out.print("\n\n");
              System.out.println(" SUN  MON  TUE  WED  THU  FRI  SAT ");
              for(int j = 1;j <= sday-1; j++)
              {
               System.out.print("     ");
               k++;
              }
             for(int i = 1;i <= tday;i++)
             {
               if(i < 10)
                System.out.print("  "+"0"+i+" ");
               else
                System.out.print("  "+i+" ");
               k++;
               if ( k == 7)
               {
                System.out.println();
                k = 0;
               }
             }
             System.out.print("\n\n");
              System.out.print("\n==================================================");
                 System.out.print("\n   Created By: Mr. Jake R. Pomperada, MAED-IT    ");
              System.out.print("\n==================================================");

           System.out.print("\n\n");

          System.exit(1);

      }
 }  // End of Code