贪吃蛇（Java实现）

//Snake.java
  1 package snake;
  2 
  3 import javax.swing.*;
  4 import java.awt.*;
  5 import java.awt.event.*;
  6 import java.io.BufferedReader;
  7 import java.io.BufferedWriter;
  8 import java.io.FileNotFoundException;
  9 import java.io.FileReader;
 10 import java.io.FileWriter;
 11 import java.io.IOException;
 12 import java.util.Iterator;
 13 import java.util.LinkedList;
 14 import java.util.Random;
 15 class go implements Runnable {
 16     Snake s;
 17     Random random;
 18     int foodX = 15, foodY = 15;
 19 int N;
 20     go(Snake snake) {
 21         s = snake;
 22         random = new Random();
 23         N=s.N;
 24     }
 25     Point getFood() {
 26         Point p = new Point();
 27         Iterator<Point> it = s.list.iterator();
 28         Point temp = it.next();
 29         boolean isFoodinBody = true;
 30         while (isFoodinBody) {
 31             foodX = Math.abs(random.nextInt()) % N;
 32             foodY = Math.abs(random.nextInt()) % N;
 33             isFoodinBody = false;
 34             while (it.hasNext()) {
 35                 temp = (Point) it.next();
 36                 if (foodX == temp.x && temp.y == foodY) {
 37                     isFoodinBody = true;
 38                     break;
 39                 }
 40             }
 41         }
 42         return p;
 43     }
 44     public void run() {
 45         while (true) {
 46             Point first = s.list.getFirst();
 47             int x = first.x, y = first.y;
 48             int gotfood = 0;
 49             if (foodX == x && foodY == y) {
 50                 if (!s.isDead) {
 51                     s.SCORE += 100;
 52                     s.scoreField.setText("SCORE:  "+new Integer(s.SCORE).toString());
 53                     s.list.add(s.list.getLast());
 54                 }
 55                 gotfood = 1;
 56                 foodX = Math.abs(random.nextInt()) % N;
 57                 foodY = Math.abs(random.nextInt()) % N;
 58                 s.bs[foodX][foodY].setBackground(Color.PINK);
 59                 
 60             }
 61             Iterator<Point> it = s.list.iterator();
 62             Point temp = it.next();
 63             while (it.hasNext()) {
 64                 temp = (Point) it.next();
 65                 if (temp.x == x && temp.y == y) {
 66                     
 67                     
 68                     s.gameOver();
 69                     
 70                 }
 71                 if (gotfood == 1 && foodX == temp.x && temp.y == foodY) {
 72                     Point food = getFood();
 73                     foodX = food.x;
 74                     foodY = food.y;
 75                     s.bs[foodX][foodY].setBackground(Color.PINK);
 76                     gotfood=0;
 77                 }
 78             }
 79             switch (s.dir) {
 80                 case 2 :
 81                     y =( (y - 1)+N )% N;
 82                     /*if (y == -1)
 83                         y = 29;*/
 84                     break;
 85                 case 0 :
 86                     y = (y + 1) % N;
 87                     break;
 88                 case 3 :
 89                     x = ((x - 1)+N) % N;
 90                     /*if (x == -1)
 91                         x = 29;*/
 92                     break;
 93                 case 1 :
 94                     x = (x + 1) % N;
 95                     break;
 96             }
 97             Point head = new Point(x, y);
 98             s.bs[x][y].setBackground(Color.LIGHT_GRAY);
 99 
100             s.list.addFirst(head);
101             Point lastP = s.list.removeLast();
102             s.bs[lastP.x][lastP.y].setBackground(Color.GRAY);
103             try {
104                 Thread.sleep(100);
105             } catch (InterruptedException e) {
106                 e.printStackTrace();
107             }
108 
109             /*
110              * for (int i = 0; i <= list.size() - 1; i++) { System.out.print(
111              * "(" + list.get(i).x + "," + list.get(i).y + ")  ");
112              * 
113              * }
114              */
115             // System.out.println();
116 
117         }
118     }
119 }
120 public class Snake extends JFrame {
121     private static final long serialVersionUID = -6494984874207734357L;
122     int N = 30;
123     int dir = 0;// 0 右 1下 2左 3上
124     int SCORE = 0;
125     int a=0,b=0,c=0;
126     boolean isDead = false;
127     JButton[][] bs = new JButton[N][N];
128     JPanel panel,scorePanel;
129     JTextField scoreField,bestScoreField;
130     LinkedList<Point> list;
131     Snake() {
132         super("Snake");
133         Container container = getContentPane();
134         container.setLayout(new BorderLayout());
135         scorePanel = new JPanel();
136         scorePanel .setLayout(new BorderLayout());
137         scoreField = new JTextField(20);
138         bestScoreField= new JTextField(50);
139         bestScoreField.setText(getBestScores());
140         bestScoreField.setEditable(false);
141         scoreField.setText("SCORE:  "+new Integer(SCORE).toString());
142         scoreField.setEditable(false);
143         scorePanel.add(scoreField,BorderLayout.WEST);
144         scorePanel.add(bestScoreField,BorderLayout.EAST);
145         container.add(scorePanel, BorderLayout.NORTH);
146         panel = new JPanel();
147         panel.setLayout(new GridLayout(N, N));
148 
149         for (int i = 0; i <= N - 1; i++) {
150             for (int j = 0; j <= N - 1; j++) {
151                 bs[i][j] = new JButton();
152                 bs[i][j].setBackground(Color.GRAY);
153                 panel.add(bs[i][j]);
154             }
155         }
156 
157         container.add(panel, BorderLayout.CENTER);
158         list = new LinkedList<Point>();
159 
160         list.add(new Point(15, 15));
161         list.add(new Point(15, 14));
162         list.add(new Point(15, 13));
163         list.add(new Point(15, 12));
164         list.add(new Point(15, 11));
165         for (int i = 0; i <= list.size() - 1; i++) {
166             bs[list.get(i).x][list.get(i).y].setBackground(Color.LIGHT_GRAY);
167         }
168         /*for (int i = 0; i <= list.size() - 1; i++) {
169             System.out.print("(" + list.get(i).x + "," + list.get(i).y + ")  ");
170 
171         }*/
172         /*System.out.println();*/
173 
174         this.addKeyListener(new KeyAdapter() {
175             public void keyPressed(KeyEvent e) {
176                 int c = e.getKeyCode();
177                 //System.out.print(c);
178                 int dir1 = dir;
179                 switch (c) {
180                     case KeyEvent.VK_LEFT :
181                         dir1 = 2;
182                         break;
183                     case KeyEvent.VK_RIGHT :
184                         dir1 = 0;
185                         break;
186                     case KeyEvent.VK_UP :
187                         dir1 = 3;
188                         break;
189                     case KeyEvent.VK_DOWN :
190                         dir1 = 1;
191                         break;
192                     default :
193                         System.out.print("hey");
194                         break;
195                 }
196                 if (!(dir1 - dir == -2 | dir1 - dir == 2))
197                     dir = dir1;
198             }
199         });
200         this.setFocusable(true);
201         setLocation(200, 10);
202         setSize(800, 700);
203         setVisible(true);
204     }
205     String getBestScores() {
206         
207         BufferedReader reader=null;
208         try {
209             reader=new BufferedReader(new FileReader("score.txt"));
210         } catch (FileNotFoundException e) {
211             e.printStackTrace();
212         }
213         
214         try {
215         a=Integer.parseInt(reader.readLine());
216         b=Integer.parseInt(reader.readLine());
217         c=Integer.parseInt(reader.readLine());
218         } catch (NumberFormatException e) {
219             e.printStackTrace();
220         } catch (IOException e) {
221             e.printStackTrace();
222         }
223         String bestS=new String("Best Score: "+new Integer(a).toString()+"   "+new Integer(b).toString()+"   "+new Integer(c).toString());
224         return bestS;
225     }
226 int gameOver(){
227     isDead = true;
228     JOptionPane.showMessageDialog(null, "你死了~~~.", "GAME OVER",
229             JOptionPane.PLAIN_MESSAGE);
230     if(SCORE>a){c=b;b=a;a=SCORE;save();System.exit(0);}
231     if(SCORE>b){c=b;b=SCORE;save();System.exit(0);}
232     if(SCORE>c){c=SCORE;save();System.exit(0);}
233     System.exit(0);
234     return 0;
235 }
236 int save(){
237     
238     BufferedWriter writer=null;
239         try {
240             writer=new BufferedWriter(new FileWriter("score.txt"));
241         } catch (IOException e) {
242             e.printStackTrace();
243         }
244     String d=new Integer(a).toString(),e=new Integer(b).toString(),f=new Integer(c).toString();
245     try {
246         writer.write(d);
247         writer.newLine();
248         writer.write(e);
249         writer.newLine();
250         writer.write(f);
251         writer.flush();
252         writer.close();
253         } catch (NumberFormatException ev) {
254         ev.printStackTrace();
255     } catch (IOException ev) {
256         ev.printStackTrace();
257     }
258     return 0;
259 }
260     public static void main(String[] args) {
261         Snake snake = new Snake();
262         snake.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
263         Thread thread = new Thread(new go(snake));
264         thread.start();
265     }
266 
267 }