private static String[][] board2 = {new String[]{"A1", "A2", "A3", "A4", "A5"},
    new String[]{"B1", "B2", "B3", "B4", "B5"}};

    public static void main(String args[]) {

        Scanner stdin = new Scanner(System.in);

        boolean textIsGood = false;
        do {
            System.out.println("Enter in A1-E5");

            String text = stdin.nextLine();

            char[] chars = text.toCharArray();
            System.out.println("Length " +chars.length);
            if (chars.length == 2) {
                char letter = chars[0];
                char number = chars[1];

                System.out.println("Letter entered: " +letter);
                System.out.println("Number entered: " +number);
                if (Character.isDigit(number)) {
                    int actualNumber = Integer.parseInt(number +"");
                    System.out.println("Is a digit!");
                    if (actualNumber >= 1) {
                        System.out.println("Made it here 1");
                        if (actualNumber < 6) {
                            System.out.println("Made it here 2");
                            if (Character.isAlphabetic(letter)) {
                                char letterSimplified = Character.toLowerCase(letter);
                                int characterValue = (int) letterSimplified;
                                if (characterValue >= 97 && characterValue <= 101) {
                                    textIsGood = true;
                                }
                            }
                        }
                    }
                }
            }

        } while (!textIsGood);



        ArrayList<Integer> shipPositions = new ArrayList<>();

        while (shipPositions.size() != 3) {
            int number = randInt(0, 10);
            if (!shipPositions.contains(number)) {
                shipPositions.add(number);
            }
        }


        HashMap<Integer, Boolean> shipHasBeenHit = new HashMap<>();
        for (Integer i : shipPositions) {
            shipHasBeenHit.put(i, false);
        }

        shipHasBeenHit.put(0, true);

        int counter = 0;
        for (Map.Entry<Integer, Boolean> entry : shipHasBeenHit.entrySet()) {
            Boolean value = entry.getValue();

            if (value) {
                counter++;
            }
            // ...
        }

        System.out.println("counter: " +counter);
//        if (counter == 7) {
//
//        }
     }