(feat) Implement Lab 5 exercise 7 - show user age

week1.java

@@ -5,8 +5,8 @@ import java.util.concurrent.ThreadLocalRandom;
 
 class runLabs {
     public static void main(String[] args) {
-        new Lab4();
-        // new Lab5();
+        // new Lab4();
+        new Lab5();
         // new Lab6();
         // new Lab7();
     }
@@ -368,6 +368,37 @@ class Lab5 extends Lab {
     class five7 extends Exercise {
         public five7() {
             super(7);
+            showUserAge();
+        }
+
+        public void showUserAge() {
+            Scanner userInput = new Scanner(System.in);
+            System.out.println(String.format("Please input your DOB"));
+            System.out.println(String.format("input format is YYYY M D"));
+            String inputString = userInput.nextLine();
+
+            Scanner processInput = new Scanner(inputString);
+
+            int dobYear = processInput.nextInt();
+            int dobMonth = processInput.nextInt();
+            int dobDay = processInput.nextInt();
+            // input sanitisation could be nice...
+
+            Calendar userDOB = Calendar.getInstance();
+            // recall months are zero-indexed!
+            userDOB.set(dobYear, dobMonth-1, dobDay);
+
+            Calendar today = Calendar.getInstance();
+
+            System.out.println(String.format("Today:\t%s", today.getTime()));
+            System.out.println(String.format(
+                "DOB  :\t%s (difference: %d years)",
+                                         userDOB.getTime(),
+                                         Lab4.yearsOld(today, userDOB)));
+
+            userInput.close();
+            processInput.close();
+
         }
     }
 }