Игра змейка

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

import java.util.ArrayList;

​

public class Main extends JFrame implements ActionListener {

    private ArrayList<Point> snakePoints;

    private int direction;

    private Point food;

    private boolean inGame;

    private Timer timer;

​

    public static void main(String[] args) {

        new Main();

    }

​

    public Main() {

        setTitle("Snake Game");

        setSize(800, 600);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setVisible(true);

​

        snakePoints = new ArrayList<>();

        direction = KeyEvent.VK_RIGHT;

        inGame = true;

​

        addKeyListener(new KeyAdapter() {

            @Override

            public void keyPressed(KeyEvent e) {

                int key = e.getKeyCode();

​

                if ((key == KeyEvent.VK_LEFT) && direction != KeyEvent.VK_RIGHT) {

                    direction = KeyEvent.VK_LEFT;

                }

​

                if ((key == KeyEvent.VK_RIGHT) && direction != KeyEvent.VK_LEFT) {

                    direction = KeyEvent.VK_RIGHT;

                }

​

                if ((key == KeyEvent.VK_UP) && direction != KeyEvent.VK_DOWN) {

                    direction = KeyEvent.VK_UP;

                }

​

                if ((key == KeyEvent.VK_DOWN) && direction != KeyEvent.VK_UP) {

                    direction = KeyEvent.VK_DOWN;

                }

            }

        });

​

        snakePoints.add(new Point(100, 100));

        snakePoints.add(new Point(90, 100));

        snakePoints.add(new Point(80, 100));

​

        food = new Point(200, 200);

​

        timer = new Timer(100, this);

        timer.start();

    }

​

    @Override

    public void paint(Graphics g) {

        super.paint(g);

​

        if (inGame) {

            g.setColor(Color.GREEN);

            for (Point point : snakePoints) {

                g.fillRect(point.x, point.y, 10, 10);

            }

​

            g.setColor(Color.RED);

            g.fillRect(food.x, food.y, 10, 10);

        } else {

            gameOver(g);

        }

    }

​

    @Override

    public void actionPerformed(ActionEvent e) {

        if (inGame) {

            checkFood();

            checkCollision();

            move();

            repaint();

        }

    }

​

    private void checkFood() {

        if (snakePoints.get(0).equals(food)) {

            snakePoints.add(food);

            int x = (int) (Math.random() * 79) * 10;

            int y = (int) (Math.random() * 59) * 10;

            food.setLocation(x, y);

        }

    }

​

    private void checkCollision() {

        for (int i = 1; i < snakePoints.size(); i++) {

            if (snakePoints.get(0).equals(snakePoints.get(i))) {

                inGame = false;

            }

        }

​

        if (snakePoints.get(0).x < 0 || snakePoints.get(0).x > 790 ||

                snakePoints.get(0).y < 0 || snakePoints.get(0).y > 590) {

            inGame = false;

        }

    }

​

    private void move() {

        Point head = snakePoints.get(0);

        Point newHead = head.getLocation();

​

        switch (direction) {

            case KeyEvent.VK_LEFT:

                newHead.x -= 10;

                break;

            case KeyEvent.VK_RIGHT:

                newHead.x += 10;

                break;

            case KeyEvent.VK_UP:

                newHead.y -= 10;

                break;

            case KeyEvent.VK_DOWN:

                newHead.y += 10;

                break;

        }

​

        snakePoints.add(0, newHead);

        snakePoints.remove(snakePoints.size() - 1);

    }

​

    private void gameOver(Graphics g) {

        String message = "Проигрыш";

        Font font = new Font("Победа", Font.BOLD, 30);

        FontMetrics metrics = getFontMetrics(font);

​

        g.setColor(Color.BLACK);

        g.setFont(font);

        g.drawString(message, (800 - metrics.stringWidth(message)) / 2, 300);

    }

}