how to turn to stream?

for (int i = 0; i < 10; i++) {
            int randomIndex = (int) (Math.random() * questions.size());
            getQuestion(randomIndex);
            checkInputMatch(randomIndex);
        }
how this
or this
for (int i = 0; i < MAX_LINE; i++) {
            line = bufferedReader.readLine().toLowerCase(Locale.ROOT);
            arrayList.add(line);
        }
or this
private void addAllVideos(BufferedReader bufferedReader) throws IOException {
        String line;
        int MAX_LINE = 22;
        for (int i = 0; i < MAX_LINE; i++) {
            line = bufferedReader.readLine().toLowerCase(Locale.ROOT);
            videos.add(new Video(line, LocalDate.now()));
        }
    }
or this
for (int i = 0; i < sampleMorseCodeInput.length(); i++){
            letterToMorseCode(sampleMorseCodeInput, i);
            audioInitialization.pathForAudio(sampleMorseCodeInput, i);
        }
or this
private boolean isDraw() {
        for (Cell[] players : getGrid()) {
            for (int i = 0; i < getGrid().length; i++) {
                if (players[i] == null || players[i].getSymbol().equals(" ") || isWinner(Cell.HUMAN)) {
                    return false;
                }
            }
        }
        return true;
    }
or this
private void runHumansTurn() {
        System.out.println("Pick a number from 1 - 9 ");
        int humanSelectedPosition = input.nextInt();
        while (isCellTaken(getCellPositioning(humanSelectedPosition)) || isRightInput(humanSelectedPosition)) {
            System.out.println("Try again ");
            humanSelectedPosition = input.nextInt();
        }
        getGrid()[(humanSelectedPosition - 1) / 3][(humanSelectedPosition - 1) % 3] = Cell.HUMAN;
    }
or this
private void displayGrid() {
        for (Cell[] players : getGrid()) {
            for (int index = 0; index < getGrid().length; index++) {
                String symbolText = players[index] == null ? " " : players[index].getSymbol();

                String delimiter = isLastRowIndex(index % getCols()) ? "\n" : "|";

                System.out.print(symbolText + delimiter);
            }
        }
    }
or this
private boolean rightToLeftDiagonalWin(Cell userCharacter) {
        for (int rows = 0; rows < ROWS; rows++) {
            Cell cell = grid[COLS - rows - 1][rows];
            if (cell != userCharacter) {
                return false;
            }
        }
        return true;
    }
or this
private boolean leftToRightDiagonalWin(Cell userCharacter) {
        for (int i = 0; i < ROWS; i++) {
            Cell cell = grid[i][i];
            if (cell != userCharacter) {
                return false;
            }
        }
        return true;
    }
or this
private boolean hasWonVertically(Cell userCharacter) {
        for (int col = 0; col < COLS; col++) {
            boolean isColWon = true;
            for (int row = 0; row < ROWS; row++) {
                Cell cellIndex = grid[row][col];
                if (cellIndex != userCharacter) {
                    isColWon = false;
                    break;
                }
            }

            if (isColWon) {
                return true;
            }
        }
        return false;
    }
or this
private int balanceCondition(int balance, int balanceLimit, String message) {
        while (balance > balanceLimit) {
            System.out.println(message);
            balance = input.nextInt();
        }
        return balance;
    }