用Java实现贪吃蛇的代码
时间: 2023-03-24 10:03:29 浏览: 85
我可以回答这个问题。以下是用Java实现贪吃蛇的代码:
```
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Snake extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private final int WIDTH = 300;
private final int HEIGHT = 300;
private final int DOT_SIZE = 10;
private final int ALL_DOTS = 900;
private final int RAND_POS = 29;
private final int DELAY = 140;
private int x[] = new int[ALL_DOTS];
private int y[] = new int[ALL_DOTS];
private int dots;
private int apple_x;
private int apple_y;
private boolean leftDirection = false;
private boolean rightDirection = true;
private boolean upDirection = false;
private boolean downDirection = false;
private boolean inGame = true;
private Timer timer;
private Image ball;
private Image apple;
private Image head;
public Snake() {
initGame();
addKeyListener(new TAdapter());
setBackground(Color.black);
setFocusable(true);
setSize(WIDTH, HEIGHT);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
}
private void initGame() {
dots = 3;
for (int z = ; z < dots; z++) {
x[z] = 50 - z * DOT_SIZE;
y[z] = 50;
}
locateApple();
timer = new Timer(DELAY, this);
timer.start();
}
@Override
public void paint(Graphics g) {
super.paint(g);
if (inGame) {
g.drawImage(apple, apple_x, apple_y, this);
for (int z = ; z < dots; z++) {
if (z == ) {
g.drawImage(head, x[z], y[z], this);
} else {
g.drawImage(ball, x[z], y[z], this);
}
}
Toolkit.getDefaultToolkit().sync();
} else {
gameOver(g);
}
}
private void gameOver(Graphics g) {
String msg = "Game Over";
Font small = new Font("Helvetica", Font.BOLD, 14);
FontMetrics metr = getFontMetrics(small);
g.setColor(Color.white);
g.setFont(small);
g.drawString(msg, (WIDTH - metr.stringWidth(msg)) / 2, HEIGHT / 2);
}
private void checkApple() {
if ((x[] == apple_x) && (y[] == apple_y)) {
dots++;
locateApple();
}
}
private void move() {
for (int z = dots; z > ; z--) {
x[z] = x[(z - 1)];
y[z] = y[(z - 1)];
}
if (leftDirection) {
x[] -= DOT_SIZE;
}
if (rightDirection) {
x[] += DOT_SIZE;
}
if (upDirection) {
y[] -= DOT_SIZE;
}
if (downDirection) {
y[] += DOT_SIZE;
}
}
private void checkCollision() {
for (int z = dots; z > ; z--) {
if ((z > 4) && (x[] == x[z]) && (y[] == y[z])) {
inGame = false;
}
}
if (y[] >= HEIGHT) {
inGame = false;
}
if (y[] < ) {
inGame = false;
}
if (x[] >= WIDTH) {
inGame = false;
}
if (x[] < ) {
inGame = false;
}
if (!inGame) {
timer.stop();
}
}
private void locateApple() {
int r = (int) (Math.random() * RAND_POS);
apple_x = ((r * DOT_SIZE));
r = (int) (Math.random() * RAND_POS);
apple_y = ((r * DOT_SIZE));
}
@Override
public void actionPerformed(ActionEvent e) {
if (inGame) {
checkApple();
checkCollision();
move();
}
repaint();
}
private class TAdapter extends KeyAdapter {
@Override
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if ((key == KeyEvent.VK_LEFT) && (!rightDirection)) {
leftDirection = true;
upDirection = false;
downDirection = false;
}
if ((key == KeyEvent.VK_RIGHT) && (!leftDirection)) {
rightDirection = true;
upDirection = false;
downDirection = false;
}
if ((key == KeyEvent.VK_UP) && (!downDirection)) {
upDirection = true;
rightDirection = false;
leftDirection = false;
}
if ((key == KeyEvent.VK_DOWN) && (!upDirection)) {
downDirection = true;
rightDirection = false;
leftDirection = false;
}
}
}
public static void main(String[] args) {
new Snake();
}
}
```