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Thread: Display Calendars in Console Program

  1. #1
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    Default Display Calendars in Console Program

    I am creating a program that prompts the user to enter a year and the first day of the month, Sun=0, Mon=1, etc . . . then shows that years calendar with the correct number date placement, but I am having severe trouble getting the actual numbered dates up... Honestly I am just not quite sure how to do it. The calendars need to be displayed in the console. Any help is appreciated... I'm just lost.

    Here's what I have so far:
     
    import javax.swing.JOptionPane;
     
    public class test {
     
        public static void main(String[] args) {
     
     
     
     
           // Prompt the user to enter input
        String yearString = JOptionPane.showInputDialog("Enter a year:");
        int year = Integer.parseInt(yearString);
     
        String firstDayString = JOptionPane.showInputDialog("Enter the first day of the year:");
        int firstDay = Integer.parseInt(firstDayString);
     
        int numberOfDaysInMonth = 0;
     
     
     
        // Display calendar for each month
        for (int month = 1; month <= 12; month++) {
          // Display Calendar title
          switch (month) {
            case 1: System.out.printf("                        January\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
                    numberOfDaysInMonth = 31;
                    break;
            case 2: System.out.printf("                        February\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
                    if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
                      numberOfDaysInMonth = 29;
                    else
                      numberOfDaysInMonth = 28;
            break;
            case 3: System.out.printf("                        March\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
            case 4: System.out.printf("                        April\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 30;
            break;
            case 5: System.out.printf("                        May\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
            case 6: System.out.printf("                        June\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 30;
            break;
            case 7: System.out.printf("                        July\n");
               System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
            case 8: System.out.printf("                        August\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
            case 9: System.out.printf("                        September\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 30;
            break;
            case 10: System.out.printf("                        October\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
            case 11: System.out.printf("                        November\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 30;
            break;
            case 12: System.out.printf("                        December\n");
                System.out.printf("=======================================================\n");
                System.out.printf("Sun     Mon     Tues     Wed      Thurs     Fri     Sat\n");
            numberOfDaysInMonth = 31;
            break;
          }
     
     
    //      switch (firstDay) {
    //       
    //        case 0: System.out.println("Sunday"); break;
    //        case 1: System.out.println("Monday"); break;
    //        case 2: System.out.println("Tuesday"); break;
    //        case 3: System.out.println("Wednesday"); break;
    //        case 4: System.out.println("Thursday"); break;
    //        case 5: System.out.println("Friday"); break;
    //        case 6: System.out.println("Saturday"); break;
    //      }
    //      // Get the start day for the next month
    firstDay = (firstDay + numberOfDaysInMonth) % 7;
        }
      }
    }

    I just made this which displays the right format for one month... but if i kept this method up it would take up so many lines of code. My professor said that it must be done in under 150 lines.

    public class NewClass {
     public static void main(String[] args) {
     
     for(int num1 = 1; num1 <= 7; num1++){
            System.out.print(num1 + "        ");
        }
         System.out.println("\n");
        for(int num2 = 8; num2 <= 14; num2++){
        System.out.print(num2+"       ");
        }
        System.out.println("\n");
        for(int num3 = 15; num3 <= 21; num3++){
            System.out.print(num3+"       ");
        }
         System.out.println("\n");
        for(int num4 = 22; num4 <= 28; num4++){
            System.out.print(num4+"       ");
        }
         System.out.println("\n");
        for(int num5 = 29; num5 <= 31; num5++){
            System.out.print(num5+"       ");
        }
     
            }
    }
    Last edited by ColeTrain; October 14th, 2012 at 07:12 PM.


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