SnakeGame

우연히 youtube를 보다가 java로 만든 뱀 게임이 있길래 새벽에 심심해서 따라해 봤다...하하하하하

 

영상의 길이는 40분이 살짝 넘어서 따라해볼만 한 것 같았다.

 

 

혹시나 궁금해하는 분들이 있을 수도 있으니 아래 링크와 코드의 흔적을 남겨놓겠다,,, 간단하면서 나름 재밌는 프로그램이니 따라해봐도 좋을 것??? 같다

 

 

Main

public class SnakeGame {
    public static void main(String[] args) {
        GameFrame frame = new GameFrame();
    }
}

Frame

import javax.swing.*;

public class GameFrame extends JFrame {
    GameFrame(){

        this.add(new GamePanel());
        this.setTitle("Snake");
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setResizable(false);
        this.pack();
        this.setVisible(true);
        this.setLocationRelativeTo(null);
    }
}

Panel

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Random;

public class GamePanel extends JPanel implements ActionListener {

    static final int SCREEN_WIDTH = 600;
    static final int SCREEN_HEIGHT = 600;
    static final int UNIT_SIZE = 25;
    static final int GAME_UNITS = (SCREEN_WIDTH*SCREEN_HEIGHT)/UNIT_SIZE;
    static final int DELAY = 75;
    final int x[] = new int[GAME_UNITS];
    final int y[] = new int[GAME_UNITS];
    int bodyParts = 6;
    int applesEaten;
    int appleX, appleY;
    char direction = 'R';
    boolean running = false;
    Timer timer;
    Random random;

    GamePanel(){
        random = new Random();
        this.setPreferredSize(new Dimension(SCREEN_WIDTH, SCREEN_HEIGHT));
        this.setBackground(Color.black);
        this.setFocusable(true);
        this.addKeyListener(new MyKeyAdapter());
        startGame();
    }

    public void startGame() {
        newApple();
        running = true;
        timer = new Timer(DELAY, this);
        timer.start();
    }

    public void paintComponent(Graphics graphics) {
        super.paintComponent(graphics);
        draw(graphics);
    }

    public void draw(Graphics graphics){

        if(running) {
            /*
            for (int i = 0; i < SCREEN_HEIGHT / UNIT_SIZE; i++) {
                graphics.setColor(Color.GRAY);
                graphics.drawLine(i * UNIT_SIZE, 0, i * UNIT_SIZE, SCREEN_HEIGHT);
                graphics.drawLine(0, i * UNIT_SIZE, SCREEN_WIDTH, i * UNIT_SIZE);
            }*/
            graphics.setColor(Color.red);
            graphics.fillOval(appleX, appleY, UNIT_SIZE, UNIT_SIZE);

            for (int i = 0; i < bodyParts; i++) {
                if (i == 0) {
                    graphics.setColor(Color.green);
                    graphics.fillRect(x[i], y[i], UNIT_SIZE, UNIT_SIZE);
                } else {
                    //graphics.setColor(new Color(45, 180, 0));
                    graphics.setColor(new Color(random.nextInt(255),random.nextInt(255),random.nextInt(255)));
                    graphics.fillRect(x[i], y[i], UNIT_SIZE, UNIT_SIZE);
                }
            }

            // Score Board
            graphics.setColor(Color.red);
            graphics.setFont(new Font("Ink Free", Font.BOLD, 40));
            FontMetrics metrics = getFontMetrics(graphics.getFont());
            graphics.drawString("Score : " + applesEaten,
                    (SCREEN_WIDTH - metrics.stringWidth("Score : " + applesEaten))/2,
                    graphics.getFont().getSize());
        } else {
            gameOver(graphics);
        }
    }

    public void move() {
        for(int i = bodyParts; i>0; i--){
            x[i] = x[i-1];
            y[i] = y[i-1];
        }

        switch (direction){
            case 'U':
                y[0] = y[0] - UNIT_SIZE;
                break;
            case 'D':
                y[0] = y[0] + UNIT_SIZE;
                break;
            case 'R':
                x[0] = x[0] + UNIT_SIZE;
                break;
            case 'L':
                x[0] = x[0] - UNIT_SIZE;
                break;
        }
    }

    public void newApple() {
        appleX = random.nextInt(SCREEN_WIDTH/UNIT_SIZE)*UNIT_SIZE;
        appleY = random.nextInt(SCREEN_HEIGHT/UNIT_SIZE)*UNIT_SIZE;
    }

    public void checkApple() {
        if((x[0] == appleX) && (y[0] == appleY)) {
            bodyParts++;
            applesEaten++;
            newApple();
        }
    }

    public void checkCollisions() {
        // check if head collids with body
        for(int i = bodyParts; i > 0; i--){
            if((x[0] == x[i]) && (y[0] == y[i])) {
                running = false;
                break;
            }
        }

        // check if head touches left, right border
        if(x[0] < 0 || x[0] > SCREEN_WIDTH) {
            running = false;
        }
        // check if head touches top, bottom border
        if(y[0] < 0 || y[0] > SCREEN_HEIGHT){
            running = false;
        }

        if(!running){
            timer.stop();
        }
    }

    public void gameOver(Graphics graphics){
        // Score
        graphics.setColor(Color.red);
        graphics.setFont(new Font("Ink Free", Font.BOLD, 40));
        FontMetrics metrics = getFontMetrics(graphics.getFont());
        graphics.drawString("Score : " + applesEaten,
                (SCREEN_WIDTH - metrics.stringWidth("Score : " + applesEaten))/2,
                graphics.getFont().getSize());
        // Game Over Text
        //graphics.setColor(Color.red);
        graphics.setFont(new Font("Ink Free", Font.BOLD, 75));
        FontMetrics metrics2 = getFontMetrics(graphics.getFont());
        graphics.drawString("Game Over",
                (SCREEN_WIDTH - metrics2.stringWidth("Game Over"))/2,
                SCREEN_HEIGHT/2);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(running){
            move();
            checkApple();
            checkCollisions();
        }
        repaint();
    }

    public class MyKeyAdapter extends KeyAdapter {
        @Override
        public void keyPressed(KeyEvent e){
            switch (e.getKeyCode()) {
                case KeyEvent.VK_LEFT:
                    if(direction != 'R'){
                        direction = 'L';
                    }
                    break;
                case KeyEvent.VK_RIGHT:
                    if(direction != 'L') {
                        direction = 'R';
                    }
                    break;
                case KeyEvent.VK_UP:
                    if(direction != 'D') {
                        direction = 'U';
                    }
                    break;
                case KeyEvent.VK_DOWN:
                    if(direction != 'U') {
                        direction = 'D';
                    }
                    break;
            }
        }
    }
}

참고로 Apple은 Snake가 먹는 먹이이며, 먹으면 뱀의 길이가 1 증가한다. 

 

 

 

 

• 참고