title: Java Calendar Program
body: <p>I have a project due soon. We have to write a program that asks for a year and prints out a calendar. We can only use one while, one for, and one switch loop. (and no arrays! ugh) Im having trouble figuring out how to print out the days of each month, starting with the first day of the first week, as most months will not start on Sunday.</p>
  
  <pre><code>import java.util.*;
  import java.util.Calendar;
  class Lab2 {
      public static void main(String[] args) {
      Scanner user = new Scanner(System.in);
      System.out.print("What year do you want to view? ");
      int year = user.nextInt();
      System.out.printf("%12d\n", year);
      System.out.println();
      boolean leap = isLeap(year);    
      int firstDay = JulianDate(year);
      monthLoop(year, firstDay, leap);
  }
  
  public static boolean isLeap(int year) {
      boolean verdict = false;
      if (year % 100 == 0 &amp;&amp; year % 400 == 0) {
          verdict = true;
      }
      if(year % 100 != 0 &amp;&amp; year % 4 == 0) {
          verdict = true;
      }
      return verdict;
  }
  
  
  public static int JulianDate(int year) {
      Calendar calendar = Calendar.getInstance();
      calendar.set(Calendar.YEAR, year);
      calendar.set(Calendar.DAY_OF_YEAR, 1);
      int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK) - 1;
      return dayOfWeek;
  }
  
  public static void monthLoop(int year, int firstDay, boolean leap) {
      for(int i=1; i &lt;= 12; i++) {
          switch (i) {
              case 1: System.out.printf("%13s\n", "January");
                      break;
              case 2: System.out.printf("%13s\n", "February");
                      break;
              case 3: System.out.printf("%12s\n", "March");
                      break;
              case 4: System.out.printf("%12s\n", "April");
                      break;
              case 5: System.out.printf("%11s\n", "May");
                      break;
              case 6: System.out.printf("%11s\n", "June");
                      break;
              case 7: System.out.printf("%11s\n", "July");
                      break;
              case 8: System.out.printf("%13s\n", "August");
                      break;
              case 9: System.out.printf("%14s\n", "September");
                      break;
              case 10: System.out.printf("%13s\n", "October");
                      break;
              case 11: System.out.printf("%14s\n", "November");
                      break;
              case 12: System.out.printf("%14s\n", "December");
                      break;                      
          }
  
      System.out.println("S  M  Tu W  Th F  S");
  
  
      }
  
  }
  
  }
  </code></pre>