Finished

src/DriverExam.java

@@ -19,13 +19,19 @@ public class DriverExam {
     /** Corresponds to each question, each true if correct answer **/
     private boolean[] missedQuestions;
 
-    // Constructors
+    // Constructor
+    /**
+     * Constructs DE object using an array of given user answers
+     * @param givenAnswers Array of the users given answers
+     */
     public DriverExam(char[] givenAnswers) {
+        // Initialzie givenAnswers array with passed array
         this.givenAnswers = givenAnswers;
         // Initialize missedQuestions to length 20. By default, they will all be False
         missedQuestions = new boolean[20];
     }
 
+    // Methods
 
     /**
      * Compares givenAnswers to correctAnswers, counting amount correct
@@ -76,6 +82,7 @@ public class DriverExam {
      */
     public ArrayList<Integer> questionsMissed() {
         ArrayList<Integer> missedNums = new ArrayList<>();
+        // Loop and add the index+1 of missed questions
         for(int i = 0; i < missedQuestions.length; i++) {
             if(missedQuestions[i]) {
                 missedNums.add(i + 1);

src/Main.java

@@ -3,39 +3,41 @@ import java.util.Scanner;
 
 public class Main {
     public static void main(String[] args) {
-        //char[] answers = {'A','B','F','F','F','F','F','A','C','D','B','C','D','A','D','C','C','B','D','A'};
+        // To hold the users inputted answers
         char[] answers = new char[20];
 
-
-        /// ////////
-        int i = 0;
+        // Compare against this string for input validation
         String checkString = "ABCD";
+        int i = 0; // Loop variable
         Scanner scanner = new Scanner(System.in);
+
+        // Loop until all 20 answers are given
         do {
             System.out.print("Question " + (i+1) + " Student Answer: ");
-            String userIn = scanner.nextLine().toUpperCase();
+            String userIn = scanner.nextLine().toUpperCase(); // toUpperCase allows us to accept lowercase letters
 
+            // Reject the answer if it isnt just a letter
             if(userIn.length() != 1){
                 System.out.println("Please input only a single letter A,B,C,or D");
                 continue;
             }
+            // Reject the answer if it isnt A, B, C, or D
             if(!checkString.contains(userIn)) {
                 System.out.println("Please input only a single letter A,B,C,or D");
                 continue;
             }
+            // Add to array and iterate if the answer is good
             answers[i] = userIn.charAt(0);
             i++;
         } while (i < 20);
 
-        /// ///////
-
+        // Test methods for class
         DriverExam test = new DriverExam(answers);
-
-        System.out.println(test.passed());
-        System.out.println(test.totalCorrect());
-        System.out.println(test.totalIncorrect());
+        System.out.println("Passed: " + test.passed());
+        System.out.println("Total Correct: " + test.totalCorrect());
+        System.out.println("Total Incorrect: " + test.totalIncorrect());
+        System.out.print("Questions Numbers Missed: ");
         ArrayList<Integer> missed = test.questionsMissed();
-
         for(var x : missed) {
             System.out.print(x + " ");
         }