snakegame.java

// To represent Snake Game
public class Game {
 
    public static final int DIRECTION_NONE = 0, DIRECTION_RIGHT = 1,
    DIRECTION_LEFT = -1, DIRECTION_UP = 2, DIRECTION_DOWN = -2;
    private Snake snake;
    private Board board;
    private int direction;
    private boolean gameOver;
 
    public Game(Snake snake, Board board)
    {
        this.snake = snake;
        this.board = board;
    }
 
    public Snake getSnake()
    {
        return snake;
    }
 
    public void setSnake(Snake snake)
    {
        this.snake = snake;
    }
 
    public Board getBoard()
    {
        return board;
    }
 
    public void setBoard(Board board)
    {
        this.board = board;
    }
 
    public boolean isGameOver()
    {
        return gameOver;
    }
 
    public void setGameOver(boolean gameOver)
    {
        this.gameOver = gameOver;
    }
 
    public int getDirection()
    {
        return direction;
    }
 
    public void setDirection(int direction)
    {
        this.direction = direction;
    }
 
    // We need to update the game at regular intervals,
    // and accept user input from the Keyboard.
    public void update()
    {
        System.out.println("Going to update the game");
        if (!gameOver) {
            if (direction != DIRECTION_NONE) {
                Cell nextCell = getNextCell(snake.getHead());
 
                if (snake.checkCrash(nextCell)) {
                    setDirection(DIRECTION_NONE);
                    gameOver = true;
                }
                else {
                    snake.move(nextCell);
                    if (nextCell.getCellType() == CellType.FOOD) {
                        snake.grow();
                        board.generateFood();
                    }
                }
            }
        }
    }
 
    private Cell getNextCell(Cell currentPosition)
    {
        System.out.println("Going to find next cell");
        int row = currentPosition.getRow();
        int col = currentPosition.getCol();
 
        if (direction == DIRECTION_RIGHT) {
            col++;
        }
        else if (direction == DIRECTION_LEFT) {
            col--;
        }
        else if (direction == DIRECTION_UP) {
            row--;
        }
        else if (direction == DIRECTION_DOWN) {
            row++;
        }
 
        Cell nextCell = board.getCells()[row][col];
 
        return nextCell;
    }
 
    public static void main(String[] args)
    {
 
        System.out.println("Going to start game");
 
        Cell initPos = new Cell(0, 0);
        Snake initSnake = new Snake(initPos);
        Board board = new Board(10, 10);
        Game newGame = new Game(initSnake, board);
        newGame.gameOver = false;
        newGame.direction = DIRECTION_RIGHT;
 
        // We need to update the game at regular intervals,
        // and accept user input from the Keyboard.
 
        // here I have just called the different methods
        // to show the functionality
        for (int i = 0; i < 5; i++) {
            if (i == 2)
                newGame.board.generateFood();
            newGame.update();
            if (i == 3)
                newGame.direction = DIRECTION_RIGHT;
            if (newGame.gameOver == true)
                break;
        }
    }
}