写个java贪吃蛇
时间: 2023-10-11 13:15:52 浏览: 44
好的,下面是一个简单的 Java 贪吃蛇游戏代码实现:
```java
import java.awt.*;
import java.awt.event.*;
import java.util.Random;
import javax.swing.*;
public class SnakeGame extends JFrame implements ActionListener {
private static final long serialVersionUID = 1L;
private final int WIDTH = 400, HEIGHT = 440;
private final int DOT_SIZE = 10, ALL_DOTS = 1600;
private final int RAND_POS = 29;
private final int x[] = new int[ALL_DOTS];
private final int y[] = new int[ALL_DOTS];
private int dots;
private int apple_x, 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 SnakeGame() {
initGame();
initUI();
}
private void initGame() {
addKeyListener(new TAdapter());
setBackground(Color.black);
setFocusable(true);
setPreferredSize(new Dimension(WIDTH, HEIGHT));
loadImages();
initGameObjects();
timer = new Timer(140, this);
timer.start();
}
private void initUI() {
setTitle("Java Snake");
setDefaultCloseOperation(EXIT_ON_CLOSE);
JPanel panel = new JPanel();
panel.setBackground(Color.black);
panel.setPreferredSize(new Dimension(WIDTH, HEIGHT));
getContentPane().add(panel);
pack();
setLocationRelativeTo(null);
setVisible(true);
}
private void loadImages() {
ImageIcon iid = new ImageIcon("dot.png");
ball = iid.getImage();
ImageIcon iia = new ImageIcon("apple.png");
apple = iia.getImage();
ImageIcon iih = new ImageIcon("head.png");
head = iih.getImage();
}
private void initGameObjects() {
dots = 3;
for (int z = 0; z < dots; z++) {
x[z] = 50 - z * 10;
y[z] = 50;
}
locateApple();
}
private void move() {
for (int z = dots; z > 0; z--) {
x[z] = x[(z - 1)];
y[z] = y[(z - 1)];
}
if (leftDirection) {
x[0] -= DOT_SIZE;
}
if (rightDirection) {
x[0] += DOT_SIZE;
}
if (upDirection) {
y[0] -= DOT_SIZE;
}
if (downDirection) {
y[0] += DOT_SIZE;
}
}
private void checkCollision() {
for (int z = dots; z > 0; z--) {
if ((z > 4) && (x[0] == x[z]) && (y[0] == y[z])) {
inGame = false;
}
}
if (y[0] >= HEIGHT) {
inGame = false;
}
if (y[0] < 0) {
inGame = false;
}
if (x[0] >= WIDTH) {
inGame = false;
}
if (x[0] < 0) {
inGame = false;
}
if (!inGame) {
timer.stop();
}
}
private void locateApple() {
Random rand = new Random();
int r = rand.nextInt(RAND_POS);
apple_x = ((r * DOT_SIZE));
r = rand.nextInt(RAND_POS);
apple_y = ((r * DOT_SIZE));
}
private void checkApple() {
if ((x[0] == apple_x) && (y[0] == apple_y)) {
dots++;
locateApple();
}
}
private void doDrawing(Graphics g) {
if (inGame) {
g.drawImage(apple, apple_x, apple_y, this);
for (int z = 0; z < dots; z++) {
if (z == 0) {
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);
}
@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 SnakeGame();
}
}
```
这个代码实现的是一个简单的贪吃蛇游戏,其中包括了贪吃蛇的移动、撞墙和自身的碰撞判断,以及吃到苹果后的处理。
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