重写贪吃蛇代码

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

public class ArrayTest { public static void main(String args[]) {  TestFrame frame = new TestFrame();  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  frame.show(); }}

class TestFrame extends JFrame { public TestFrame() {  setSize(width, height);  this.setBackground(Color.BLACK);  Container c = getContentPane();

  TestPanel panel = new TestPanel();  c.add(panel, BorderLayout.CENTER); }

 int width = 600;

 int height = 500;}

// TestPanel类实现移动的功能:当按键时,在头部增加新的节点,同时去掉尾部的节点class TestPanel extends JPanel implements KeyListener {

 int sideX = 15;// 定义节点的宽和高;

 int sideY = 15;

 int panelWidth = 600;

 int panelHeight = 500;

 int d = 1;// 移动的步长;

 int foodX;

 int foodY;

 TestNode n;

 Rectangle2D foodRect;

 Rectangle2D snakeHead;

 LinkedList list = new LinkedList();

 public TestPanel() {  // 当游戏开始时,初始化蛇,食物的位置  for (int i = 0; i < 10; i++) {   list.add(new TestNode(sideX + i, sideY));// 初始化node.  }// 初试化蛇  foodX = 45;  foodY = 60;// 初始化食物的位置  foodRect = new Rectangle2D.Double(foodX, foodY, 10, 10);  snakeHead = new Rectangle2D.Double();  this.setSize(panelWidth, panelHeight);  this.setBackground(Color.BLACK);  setFocusable(true);  addKeyListener(this); }

 public void paintComponent(Graphics g) {  super.paintComponent(g);  Graphics2D g2 = (Graphics2D) g;  // 绘制食物和蛇  g2.setColor(Color.YELLOW);  g2.fill(foodRect);  Iterator it = list.iterator();  g2.setColor(Color.RED);  while (it.hasNext()) {   n = (TestNode) it.next();   g2.fillRect(n.nodeX * sideX, n.nodeY * sideY, sideX - 1, sideY - 1);  }  // 将蛇头填充为黄色.  g2.setColor(Color.YELLOW);  TestNode first = (TestNode) list.getFirst();  snakeHead = new Rectangle2D.Double(first.nodeX * sideX, first.nodeY    * sideY, sideX - 1, sideX - 1);  g2.fill(snakeHead); }

 public void keyPressed(KeyEvent e) {  int keycode = e.getKeyCode();  if (keycode == KeyEvent.VK_LEFT) {   move(-d, 0);

  } else if (keycode == KeyEvent.VK_DOWN) {   move(0, d);  } else if (keycode == KeyEvent.VK_UP) {   move(0, -d);  } else if (keycode == KeyEvent.VK_RIGHT) {   move(d, 0);  } }

 public void keyReleased(KeyEvent e) { }

 public void keyTyped(KeyEvent e) { }

 // 蛇的运动函数; public void move(int mx, int my) {

  TestNode n = (TestNode) list.getFirst();  int maxX = this.getWidth() / sideX;  int maxY = this.getHeight() / sideY;  int x = n.nodeX;  int y = n.nodeY;  if ((x >= 0 && x < maxX - 0.5) && (y >= 0 && y < maxY)) {   if (snakeHead.contains(foodRect)) {    foodX = 1 + (int) (Math.random() * panelWidth / sideX) * 15;    foodY = 1 + (int) (Math.random() * panelHeight / sideY) * 15;    foodRect = new Rectangle2D.Double(foodX, foodY, 10, 10);    list.addFirst(new TestNode(x + mx, y + my));   } else {    list.addFirst(new TestNode(x + mx, y + my));    list.removeLast();   }  } else {   JOptionPane.showMessageDialog(null, "GAME OVER");   System.exit(0);  }  repaint(); }}

class TestNode {// 可以算做是节点类吧. int nodeX;

 int nodeY;

 public TestNode(int x, int y) {  this.nodeX = x;  this.nodeY = y; }}