Snake

package Exam20200628;

import java.util.Arrays;
import java.util.Scanner;

public class Snake {

    public  static int food = 0;
    public  static int newRow = 0;
    public  static int newCol = 0;
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        int n = Integer.parseInt(scanner.nextLine());

        char[][] field = new char[n][n];

        int snakeRow = 0;
        int snakeCol = 0;

        for (int i = 0; i < n; i++) {
            String line = scanner.nextLine();

            if (line.contains("S")) {
                snakeRow = i;
                snakeCol = line.indexOf("S");
            }
            char[] input = line.toCharArray();
            field[i] = input;

        }

        while (food < 10) {
            String direction = scanner.nextLine();

            if (direction.equals("up")) {
                // row --
                newRow = snakeRow - 1;
                newCol = snakeCol;

            } else if (direction.equals("down")) {
                // row ++
                newRow = snakeRow + 1;
                newCol = snakeCol;


            } else if (direction.equals("left")) {
                //col --
                newRow = snakeRow;
                newCol = snakeCol - 1;


            } else if (direction.equals("right")) {
                // col ++
                newRow = snakeRow;
                newCol = snakeCol + 1;


            }
            if (isOutOfBounds(newRow, newCol, field)) {
                field[snakeRow][snakeCol] = '.';
                System.out.println("Game over!");
                break;
            }
            if (field[newRow][newCol] == '*') {
                food++;
            }
            // burrow marked with 'B'
            else if (field[newRow][newCol] == 'B') {
                moovefromStartToTheExitOfBurrow(n, field);
            }

            field[snakeRow][snakeCol] = '.';
            field[newRow][newCol] = 'S';
            snakeRow = newRow;
            snakeCol = newCol;


        }
        if (food >= 10) {
            System.out.println("You won! You fed the snake.");
        }
        System.out.printf("Food eaten: %d%n", food);

        for (char[] symbol : field) {
            for (char c : symbol) {
                System.out.print(c);
            }
            System.out.println();
        }

    }

    public static void moovefromStartToTheExitOfBurrow(int n, char[][] field) {
        field[newRow][newCol] = '.';
        for (int row = newRow + 1; row < n; row++) {
            for (int col = 0; col < field[row].length; col++) {
                if (field[row][col] == 'B') {
                    newRow = row;
                    newCol = col;
                }
            }

        }
    }

    private static boolean isOutOfBounds(int row, int col, char[][] field) {
        return row < 0 || row >= field.length
                || col < 0 || col >= field[row].length;
    }

}