目前我正在攻读计算机科学，我的老师希望我用数组进行蛇形游戏。
我的代码与我朋友的代码完全相同，但它只会长出一个体长而且不会长得更长，在食用食物后它开始减慢移动蛇的速度。我不确定我哪里出错了请帮忙。谢谢。
以下是代码：
public class Main extends JPanel implements KeyListener, ActionListener {
private static final long serialVersionUID = 1L;
static int dir;
static int i;
static int x[] = new int[200]; // Decleare Array of snake on x coordinate
static int y[] = new int[200]; // Decleare Array of snake on y coordinate
static int taillength = 1;
static int sxinc = 20, syinc = 20; // Speed of moving snake
static int fx = 100, fy = 100; // Declare the position of where food at
static int f2x = 300, f2y = 300; // Declare the position of where food2 at
static int fmx = 300, fmy = 100; // Declare the position of where food3 at
static int score = 0; // Create Score Counter
static int width = 745, height = 489; // Declare the size of JPanel
static int nsx, nsy; // The new value of the snake movement
static int csx = 20, csy = 20; // The value to add/minus on the number to
static BufferedImage background = null;
static JFrame f;
static JFrame g;
public Main() {
addKeyListener(this);
}
public void addNotify() {
super.addNotify();
requestFocus();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(background, 0, 0, width, height, this);
g.setColor(Color.GREEN);
g.fillRect(fx, fy, 20, 20);
g.setFont(new Font("Times New Roman", Font.BOLD, 15));
g.setColor(Color.GREEN);
g.drawString("GREEN - Add 1 body length, add 1 score", 0, 429);
g.setColor(Color.BLUE);
g.fillRect(f2x, f2y, 20, 20);
g.setFont(new Font("Times New Roman", Font.BOLD, 15));
g.setColor(Color.BLUE);
g.drawString("BLUE - Add 2 body length, add 2 score", 0, 444);
g.setColor(Color.CYAN);
g.fillRect(fmx, fmy, 20, 20);
g.setFont(new Font("Times New Roman", Font.BOLD, 15));
g.setColor(Color.CYAN);
g.drawString("CYAN - Minus 1 body length, add 1 score", 0, 459);
g.setColor(Color.RED);
for (int j = 0; j < x.length && j < taillength; j++) {
g.fillRect(x[j], y[j], 20, 20);
g.setColor(Color.ORANGE);
}
g.fillRect(x[0], y[0], 20, 20);
g.setColor(Color.RED);
g.setFont(new Font("Times New Roman", Font.BOLD, 25));
g.setColor(Color.WHITE);
g.drawString("Score : " + score, 305, 459);
}
public void snakenew() {
for (int i = 0; i < x.length; i++) {
x[i] = 0;
y[i] = 0;
}
}
public static void main(String a[]) {
x[0] = 300;
y[0] = 220;
try { // Import Background
background = ImageIO.read(new File("H:/shutterstock_12730534.jpg"));
} catch (IOException e) {
}
Main p = new Main();
g = new JFrame();
g.add(p);
g.setSize(200, 300);
g.setVisible(true);
g.setResizable(false);
f = new JFrame();
f.add(p);
f.setSize(width, height);
f.setVisible(true);
f.setResizable(false);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Timer t = new Timer(60, p);
t.start();
}
public void actionPerformed(ActionEvent e) {
if ((x[0] + 20 > width) || (x[0] < 0) || (y[0] + 40 > height)
|| (y[0] < 0)) { // Game over when hit the wall
JOptionPane.showMessageDialog(null, "You hit the wall!", "Game",
JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
if ((taillength > 1) && (x[i] != x[0]) && (y[i] != y[0])) { // Game over
// when
// touch you
// snake
// body
if ((x[0] == x[i]) & (y[0] == y[i])) {
JOptionPane.showMessageDialog(null, "You ran into yourself!",
"Game", JOptionPane.INFORMATION_MESSAGE);
}
}
if (dir == KeyEvent.VK_UP) {
if (y[0] == y[taillength]) {
y[0] = y[0] - syinc;
}
}
else if (dir == KeyEvent.VK_DOWN) {
if (y[0] == y[taillength]) {
y[0] = y[0] + syinc;
}
}
else if (dir == KeyEvent.VK_LEFT) {
if (x[0] == x[taillength]) {
x[0] = x[0] - sxinc;
}
}
else if (dir == KeyEvent.VK_RIGHT) {
if (x[0] == x[taillength]) {
x[0] = x[0] + sxinc;
}
}
if (dir == KeyEvent.VK_K) {
if ((score > 6) && (taillength > 5)) {
taillength = taillength - 5;
score = score - 7;
}
}
if ((x[0] == fx) && (y[0] == fy)) { // Food Score and random food
fx = (int) (Math.random() * 37) * 20;
fy = (int) (Math.random() * 25) * 20;
taillength++;
score++;
}
if ((x[0] == f2x) && (y[0] == f2y)) {
f2x = (int) (Math.random() * 37) * 20;
f2y = (int) (Math.random() * 25) * 20;
taillength = taillength + 2;
score = score + 2;
}
if ((x[0] == fmx) && (y[0] == fmy)) {
if (taillength > 0) {
fmx = (int) (Math.random() * 37) * 20;
fy = (int) (Math.random() * 25) * 20;
taillength--;
score++;
}
}
for (i = taillength; i > 0; i--) {
x[i] = x[(i - 1)];
y[i] = y[(i - 1)];
}
f.repaint();
}
public void keyPressed(KeyEvent ke) {
dir = ke.getKeyCode();
}
public void keyReleased(KeyEvent arg0) {
}
public void keyTyped(KeyEvent arg0) {
}
}
答案 0 :(得分：2)
一些事情：
run()方法......这不是计时器的工作原理（请参考最后一点说明原因）。 paint()方法的这种用法可归因于与最后一点相同的推理。总之：如果您想借用代码，请不要向与您在同一课程中的人员借用代码。最后，查看Java中Snake游戏的一些示例。我确定你会发现一些经历过类似问题的人，你可能会从中学到什么。我希望这对你有所帮助，祝你好运！