Exception in thread "AWT-EventQueue-0" java.lang.StackOverflowError at java.awt.AWTEventMulticaster.keyPressed(Unknown Source)q'jiu'jie

Question

package com.attempt.snake;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.image.BufferedImage;import java.util.Arrays;import java.util.Random;import javax.imageio.ImageIO;import javax.swing.JFrame;import javax.swing.JPanel;public class GluttonousSnake extends JPanel implements Runnable { // 窗体 public static final int width = 675;// 面板宽 public static final int height = 540;// 面板高 // 规定 private int state = START; private static final int START = 0; private static final int RUNNING = 1; private static final int GAME_OVER = 3; // 图像 public static BufferedImage start;// 开始背景 public static BufferedImage game_over;// 结束背景 public static BufferedImage background;// 运行背景 public static BufferedImage drumstick;// 鸡腿 public static BufferedImage snakeBody;// 蛇身 public static BufferedImage snakeHeart_u;// 蛇头上 public static BufferedImage snakeHeart_d;// 蛇头下 public static BufferedImage snakeHeart_r;// 蛇头右 public static BufferedImage snakeHeart_l;// 蛇头左 // 数据 private int score = 0;// 得分 private int speed = 50;// 变换速率 private int count = 0;// 次数（用来改变蛇的速度） int Ux = 0;// 记忆吃鸡腿前一步的最后一节蛇身的位置x int Uy = 0;// 记忆吃鸡腿前一步的最后一节蛇身的位置y // 对象 private Snake snakeHead = new Snake();// 蛇头 private All snakes[] = { snakeHead };// 整条蛇 private int direction = 1; Drumstick drumsticks = new Drumstick(270, 270); // private Timer timer;// 时间线程 // 静态块初始化图片 static { try { start = ImageIO .read(GluttonousSnake.class.getResource("start.png")); background = ImageIO.read(GluttonousSnake.class .getResource("background.png")); game_over = ImageIO.read(GluttonousSnake.class .getResource("game_over.png")); drumstick = ImageIO.read(GluttonousSnake.class .getResource("drumstick.png")); snakeBody = ImageIO.read(GluttonousSnake.class .getResource("SnakeBody.png")); snakeHeart_u = ImageIO.read(GluttonousSnake.class .getResource("SnakeHeart_u.png")); snakeHeart_d = ImageIO.read(GluttonousSnake.class .getResource("SnakeHeart_d.png")); snakeHeart_r = ImageIO.read(GluttonousSnake.class .getResource("SnakeHeart_r.png")); snakeHeart_l = ImageIO.read(GluttonousSnake.class .getResource("SnakeHeart_l.png")); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } // 游戏开始 public void action() { this.addMouseListener(new MouseAdapter() { @Override public void mouseClicked(MouseEvent e) { // TODO Auto-generated method stub if (state == START) { if (e.getX() >= 275 && e.getX() <= 417 && e.getY() >= 464 && e.getY() <= 488) { state = RUNNING; } } if (state == GAME_OVER) { if (e.getX() >= 249 && e.getX() <= 426 && e.getY() >= 264 && e.getY() <= 353) { speed = 50; snakes = Arrays.copyOf(snakes, 1); snakeHead = new Snake(); snakes[0] = snakeHead; direction = 1; count = 0; score = 0; state = RUNNING; } } } }); } // 重写Runable线程中的run方法 @Override public void run() { // TODO Auto-generated method stub count++; this.addKeyListener(new KeyAdapter() { @Override public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub switch (e.getKeyCode()) { case KeyEvent.VK_UP: if (direction != 1) direction = 2; break; case KeyEvent.VK_DOWN: if (direction != 2) direction = 1; break; case KeyEvent.VK_LEFT: if (direction != 3) direction = 4; break; case KeyEvent.VK_RIGHT: if (direction != 4) direction = 3; break; default: break; } } }); if (state == RUNNING) { if (nolive()) { state = GAME_OVER; } if (count % speed == 0) { moveTo(); snakeHead.step(direction); eatDrumstick(); } } repaint(); // 蛇的速度就会增加 if (count % 1000 == 0 && speed > 2) { speed -= 2; } try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } // 判死 public boolean nolive() { if (snakeHead.hitOneself(snakes) && snakes.length > 1) { return true; } else if (snakeHead.outOfBound(width, height)) { return true; } else { return false; } } // 蛇移动 public void moveTo() { if (snakes.length > 1) { for (int i = snakes.length - 1; i > 0; i--) { snakes[i].x = snakes[i - 1].x; snakes[i].y = snakes[i - 1].y; } } } // 蛇吃到鸡腿的方法 public void eatDrumstick() { int panduan = 0; if ((snakeHead.getX() + snakeHead.getImageWidth() / 2) <= (drumsticks .getX() + drumsticks.getImageWidth() / 2) && (snakeHead.getX() + snakeHead.getImageWidth() / 2) >= (drumsticks .getX() - drumsticks.getImageWidth() / 2) && (snakeHead.getY() + snakeHead.getImageHeight() / 2) <= (drumsticks .getY() + drumsticks.getImageHeight() / 2) && (snakeHead.getY() + snakeHead.getImageHeight() / 2) >= (drumsticks .getY() - drumsticks.getImageHeight() / 2)) { panduan = 1; score += drumsticks.getScore(); snakes = Arrays.copyOf(snakes, snakes.length + 1); snakes[snakes.length - 1] = drumsticks; snakes[snakes.length - 1].x = Ux; snakes[snakes.length - 1].y = Uy; RandDrumstick(); } if (panduan == 0) { Ux = snakes[snakes.length - 1].x; Uy = snakes[snakes.length - 1].y; } panduan = 0; } // 鸡腿去向 public void RandDrumstick() { int x; int y; Random random = new Random(); x = 45 + random.nextInt(13) * 45; y = 45 + random.nextInt(10) * 45; drumsticks = new Drumstick(x, y); } // 重写画笔方法 public void paint(Graphics g) { new Thread(this).start(); // 状态 paintState(g); if (state == RUNNING) { // 画蛇 paintSnake(g); // 鸡腿 g.drawImage(drumstick, drumsticks.getX(), drumsticks.getY(), null); // 分数 paintScore(g); } } // 画蛇 public void paintSnake(Graphics g) { if (snakes.length > 1) { for (int i = 1; i < snakes.length; i++) { g.drawImage(snakeBody, snakes[i].getX(), snakes[i].getY(), null); } g.drawImage(snakeHead.getImage(), snakeHead.getX(), snakeHead.getY(), null); } else { g.drawImage(snakeHead.getImage(), snakeHead.getX(), snakeHead.getY(), null); } } // 分数 public void paintScore(Graphics g) { int x = 10; // int y = 25; // Font font = new Font(Font.SANS_SERIF, Font.BOLD, 14); // 字体 g.setColor(new Color(0x3A3B3B)); g.setFont(font); // 设置字体 g.drawString("SCORE:" + score, x, y); // 分数 } // 游戏状态 public void paintState(Graphics g) { switch (state) { case START: // 开始״̬ g.drawImage(start, 0, 0, null); break; case RUNNING: // 游戏״̬ g.drawImage(background, 0, 0, null); break; case GAME_OVER: // 游戏״̬ g.drawImage(game_over, 0, 0, null); break; } } public static void main(String[] args) { JFrame frame = new JFrame(); GluttonousSnake game = new GluttonousSnake(); frame.add(game); // 将面板添加到JFrame中 frame.setSize(width, height); // 设置大小 frame.setAlwaysOnTop(true); // 设置其总在最上 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 默认关闭操作 frame.setLocationRelativeTo(null); // 设置窗体初始位置 frame.setVisible(true); // 尽快调用paint game.setFocusable(true); game.action(); }}具体的代码

Answer 1

将数组换成list依然会报错