Switch challenges

switch/switch/src/Main.java

@@ -13,7 +13,11 @@ public class Main {
         String month = "aprilr";
         System.out.println(month + " is in the " + getQuarter(month) + " quarter");*/
         // System.out.println(getNATO('x'));
-        getDayOfTheWeek(3);
+        // getDayOfTheWeek(3);
+        System.out.println(isLeapYear(-1600));
+        System.out.println(isLeapYear(1600));
+        System.out.println(isLeapYear(2017));
+        System.out.println(isLeapYear(2000));
     }
 
     public static String getQuarter(String month) {
@@ -59,4 +63,29 @@ public class Main {
         };
         System.out.println(dayOfTheWeek);
     }
+
+    public static boolean isLeapYear(int year){
+        if (year <= 1 || year >= 9999) {
+            System.out.print("Invalid year!: ");
+            return false;
+        }
+        if(year % 4 == 0) {
+            if (year % 100 != 0) {
+                System.out.print("Year is divisible by 4 and not by 100.: ");
+                return true;
+            } else {
+                if (year % 400 == 0){
+                    System.out.print("Year is divisible by 4, by 100 and by 400.: ");
+                    return true;
+                }
+                else {
+                    System.out.print("Ordinary leap year.: ");
+                    return false;
+                }
+            }
+        } else {
+            System.out.print("Not divisible by 4.: ");
+            return false;
+        }
+    }
 }
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