Update APCalendar.java

src/main/java/APCalendar.java

@@ -1,3 +1,4 @@
+
 public class APCalendar
 {
   /** Returns true if year is a leap year and false otherwise. */
@@ -12,7 +13,11 @@ private static boolean isLeapYear(int year)
    */
   public static int numberOfLeapYears(int year1, int year2)
   { 
-    /* to be implemented in part (a) */
+    int sum = 0;
+    for(int i = year1; i <= year2; i++)
+if(isLeapYear(i))
+sum++;
+return sum;
 
   }
 
@@ -51,6 +56,17 @@ private static int dayOfYear(int month, int day, int year)
    */
   public static int dayOfWeek(int month, int day, int year)
   {
-    /* to be implemented in part (b) */
+    int dayOfTheYear = dayOfYear(month, day, year);
+    int firstDayOfTheYear = firstDayOfYear(year);
+    int days = firstDayOfTheYear;
+    for (int i = 1; i < dayOfTheYear; i++)
+      {
+        days++;
+        if (days == 7)
+        {
+          days = 0;
+        }
+      }
+    return days;
   }
 }