Need some help with method for calendar

Question

Hi all,
I've got to design a claendar for college but I'm not allowed use any one the Java calendar classes so I've but up a number of methods to get the start days of months etc.
At the moment I'm trying to get a method working tha will loop around 12 times and assign the days in the month to a string array for printing later in another function but to test I'm printing to screen.
At the moment when I get the days to print on screen It shows me the days for Janurary similar to below 12 times and I've been looking at it so long I can't see the wood for the trees and I was just wondering if someone can point out when I'm going wrong here.
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
The data for the start days and total number of days in a month are held in arrays in seperate methods as well.
With the following code I'm just getting the days for Jan to print out 12 times.
I thnik the the problem is with the first part of the while loop It does not appear to be looping throught the DaysIn and TopLeft arrays as if I manually change the value of the variable l = 1; I get the days for Feb to print out.
           static int [] DaysIn (int y) //  return correct day in month
         int [] LDays = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; // leap year.
         int [] Days = {31, 28, 31, 30, 31, 31, 31, 30, 30, 31, 30, 31};
     if (y%4==0 && (y%100!=0 || y%400==0)) // test if y is a leap year. y is gotten from print cal.
         return LDays;
     else               
        return Days;
static int [] TopLeft (int y) // find the starting position of the days in a month for printing
        int [] k = StartDay(y);
        int [] TopLeft = new int [12];
        int t = 0;
       while (t!=12)
     TopLeft[t] = 1- k[t];
     t++;
       return TopLeft;
static String [] DispMonthDays(int y) // Method to supply the days of a month in grid form needs work.
     int k = 0; // int to take the topleft value for each month
     int DIM = 0; // int to take the total days in each month
    String MonthD=""; // empty string
     String [] MonthDay = new String [6];
     int l= 0;
               While(l!=12)
          k = TopLeft(y)[l]; // Believe problem lies at these two lines
          DIM = DaysIn(y)[l];  //
            while (k != 42)
             if (k < 1){MonthD = MonthD + " "+" "+" ";}
                                  else if (k >=1 && k <=9){MonthD = MonthD + " "+ k +" ";}
                else if (k >= 10 && k <= DIM){MonthD = MonthD + k + " ";}
                else if(k > DIM){MonthD = MonthD +" ";}
                k++;     
          MonthDay[0] = MonthD.substring(0,20);
          MonthDay[1] = MonthD.substring(21,41);
          MonthDay[2] = MonthD.substring(42,62);
          MonthDay[3] = MonthD.substring(63,83);
          MonthDay[4] = MonthD.substring(84,104);
          MonthDay[5] = MonthD.substring(105,106);
     l++;}
     return MonthDay;
static void PrintCal(int y) // function to hand off year and print cal
     int upstep=0;
    int count=0;
    while (count !=12)
          while (upstep!=6)
             System.out.print(DispMonthDays(y)[upstep]);System.out.println();
               upstep++;
          upstep=0;
          count++;
}Any help greatly appreciated

Answer 1

Given the previous valid comment here is my code again.
I'm running the code on the console
   // Months of year          
                static final String [] MNames  = {"January ", "February ", "March ", 
                    "April ",   "May ",      "June ",
                    "July ",    "August ",   "September ",
                     "October ", "November ", "December "};
     static int [] daysIn (int y) // see if y is a leap year and return correct day in month
           int [] LDays = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; // leap year.
           int [] Days = {31, 28, 31, 30, 31, 31, 31, 30, 30, 31, 30, 31};
          if (y%4==0 && (y%100!=0 || y%400==0)) // test if y is a leap year. y is gotten from printCal.
          return LDays;
          else               
          return Days;
                static int [] startDay(int y) // Find First Day of a month
          int [] z = daysIn(y);
          int firstDay =((y-1900)*365 +(y-1901)/4)%7;
          int x = 0;
         int [] startDay = new int [12];
         while (x!=12)
          if (x==0)
             {startDay[0] = firstDay; firstDay = (firstDay+z[0])%7;}
          else
             {startDay[x] = firstDay; firstDay = (firstDay+z[x])%7;}
          x++;
          return startDay;
       static int [] topLeft (int y) // find the starting position of the days in a month for printing
          int [] k = startDay(y);
          int [] topLeft = new int [12];
          int t = 0;
                                     while (t!=12)
                   topLeft[t] = 1- k[t];
                                          t++;
          return topLeft;
       static String [] dispMonthDays(int y) // Method to supply the days of a month in grid form needs work.
             int k = 0; // int to take the topleft value for each month
             int dim = 0; // int to take the total days in each month               
                        String monthD=""; // empty string
             String [] monthDay = new String [6]; // String Array to take the results of MonthD  and be returned 12 tmes
          int loopThrough= 0; // int variable to progress through the topLeft and daysIn arrays
          while(loopThrough !=12)
                 k = topLeft(y)[loopThrought]; // Not being moved through as far as I can see
                dim = daysIn(y)[loopThrough];
                      while (k != 42)
                 if (k < 1){monthD = monthD + " "+" "+" ";}
                    else if (k >=1 && k <=9){monthD = monthD + " "+ k +" ";}
                   else if (k >= 10 && k <= dim){monthD = monthD + k + " ";}
                   else if(k > dim){monthD = monthD +" ";}
                   k++;}
                 monthDay[0] = monthD.substring(0,20);
                 monthDay[1] = monthD.substring(21,41);
                 monthDay[2] = monthD.substring(42,62);
                 monthDay[3] = monthD.substring(63,83);
                 monthDay[4] = monthD.substring(84,104);
                 monthDay[5] = monthD.substring(105,106);
               l++;
          return monthDay;
   static void printCal(int y) // function to hand off year and print cal amended for testing to see if dispMonthDays is working
     int count=0;
     int upstep=0; // int variable to return the monthDay
                      while (count !=12)
          while (upstep!=6)
                  System.out.print(dispMonthDays(y)[upstep]);
                   upstep++;
           upstep=0;
          count++;
  public static void main (String [] args)
     Scanner input = new Scanner (System.in);
     System.out.print("Enter a year: "); int year = input.nextInt();
         printCal(year);
              I still think the problem is with the first loop in dispMonthDays