完整的贪吃蛇(蛇吃蛋)Java源代码
代码：
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
public class SnakeGame {
public static void main(String[] args) {
SnakeFrame frame = new SnakeFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
// ----------记录状态的线程
class StatusRunnable implements Runnable {
public StatusRunnable(Snake snake, JLabel statusLabel, JLabel scoreLabel) {
this.statusLabel = statusLabel;
this.scoreLabel = scoreLabel;
this.snake = snake;
}
public void run() {
String sta = "";
String spe = "";
while (true) {
switch (snake.status) {
case Snake.RUNNING:
sta = "Running";
break;
case Snake.PAUSED:
sta = "Paused";
break;
case Snake.GAMEOVER:
sta = "GameOver";
break;
}
statusLabel.setText(sta);
scoreLabel.setText("" + snake.score);
try {
Thread.sleep(100);
} catch (Exception e) {
}
}
}
private JLabel scoreLabel;
private JLabel statusLabel;
private Snake snake;
}
// ----------蛇运动以及记录分数的线程
class SnakeRunnable implements Runnable {
public SnakeRunnable(Snake snake, Component component) {
this.snake = snake;
this.component = component;
}
public void run() {
while (true) {
try {
snake.move();
component.repaint();
Thread.sleep(snake.speed);
} catch (Exception e) {
}
}
}
private Snake snake;
private Component component;
}
class Snake {
boolean isRun;// ---------是否运动中
ArrayList<Node> body;// -----蛇体
Node food;// --------食物
int derection;// --------方向
int score;
int status;
int speed;
public static final int SLOW = 500;
public static final int MID = 300;
public static final int FAST = 100;
public static final int RUNNING = 1;
public static final int PAUSED = 2;
public static final int GAMEOVER = 3;
public static final int LEFT = 1;
public static final int UP = 2;
public static final int RIGHT = 3;
public static final int DOWN = 4;
public Snake() {
speed = Snake.SLOW;
score = 0;
isRun = false;
status = Snake.PAUSED;
derection = Snake.RIGHT;
body = new ArrayList<Node>();
body.add(new Node(60, 20));
body.add(new Node(40, 20));
body.add(new Node(20, 20));
makeFood();
}
// ------------判断食物是否被蛇吃掉
// -------如果食物在蛇运行方向的正前方，并且与蛇头接触，则被吃掉
private boolean isEaten() {
Node head = body.get(0);
if (derection == Snake.RIGHT && (head.x + Node.W) == food.x
&& head.y == food.y)
return true;
if (derection == Snake.LEFT && (head.x - Node.W) == food.x
&& head.y == food.y)
return true;
if (derection == Snake.UP && head.x == food.x
&& (head.y - Node.H) == food.y)
return true;
if (derection == Snake.DOWN && head.x == food.x
&& (head.y + Node.H) == food.y)
return true;
else
return false;
}
// ----------是否碰撞
private boolean isCollsion() {
Node node = body.get(0);
// ------------碰壁
if (derection == Snake.RIGHT && node.x == 280)
return true;
if (derection == Snake.UP && node.y == 0)
return true;
if (derection == Snake.LEFT && node.x == 0)
return true;
if (derection == Snake.DOWN && node.y == 380)
return true;
// --------------蛇头碰到蛇身
Node temp = null;
int i = 0;
for (i = 3; i < body.size(); i++) {
temp = body.get(i);
if (temp.x == node.x && temp.y == node.y)
break;
}
if (i < body.size())
return true;
else
return false;
}
// -------在随机的地方产生食物
public void makeFood() {
Node node = new Node(0, 0);
boolean isInBody = true;
int x = 0, y = 0;
int X = 0, Y = 0;
int i = 0;
while (isInBody) {
x = (int) (Math.random() * 15);
y = (int) (Math.random() * 20);
X = x * Node.W;
Y = y * Node.H;
for (i = 0; i < body.size(); i++) {
if (X == body.get(i).x && Y == body.get(i).y)
break;
}
if (i < body.size())
isInBody = true;
else
isInBody = false;
}
food = new Node(X, Y);
}
// ---------改变运行方向
public void changeDerection(int newDer) {
if (derection % 2 != newDer % 2)// -------如果与原来方向相同或相反，则无法改变
derection = newDer;
}
public void move() {
if (isEaten()) {// -----如果食物被吃掉
body.add(0, food);// --------把食物当成蛇头成为新的蛇体
score += 10;
makeFood();// --------产生食物
} else if (isCollsion())// ---------如果碰壁或自身
{
isRun = false;
status = Snake.GAMEOVER;// -----结束
} else if (isRun) {// ----正常运行（不吃食物，不碰壁，不碰自身）
Node node = body.get(0);
int X = node.x;
int Y = node.y;
// ------------蛇头按运行方向前进一个单位
switch (derection) {
case 1:
X -= Node.W;
break;
case 2:
Y -= Node.H;
break;
case 3:
X += Node.W;
break;
case 4:
Y += Node.H;
break;
}
body.add(0, new Node(X, Y));
// ---------------去掉蛇尾
body.remove(body.size() - 1);
}
}
}
// ---------组成蛇身的单位，食物
class Node {
public static final int W = 20;
public static final int H = 20;
int x;
int y;
public Node(int x, int y) {
this.x = x;
this.y = y;
}
}
// ------画板
class SnakePanel extends JPanel {
Snake snake;
public SnakePanel(Snake snake) {
this.snake = snake;
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Node node = null;
for (int i = 0; i < snake.body.size(); i++) {// ---红蓝间隔画蛇身
if (i % 2 == 0)
g.setColor(Color.blue);
else
g.setColor(Color.yellow);
node = snake.body.get(i);
g.fillRect(node.x, node.y, node.H, node.W);// *******************试用*********************
}
node = snake.food;
g.setColor(Color.red);
g.fillRect(node.x, node.y, node.H, node.W);
}
}
class SnakeFrame extends JFrame {
private JLabel statusLabel;
private JLabel speedLabel;
private JLabel scoreLabel;
private JPanel snakePanel;
private Snake snake;
private JMenuBar bar;
JMenu gameMenu;
JMenu helpMenu;
JMenu speedMenu;
JMenuItem newItem;
JMenuItem pauseItem;
JMenuItem beginItem;
JMenuItem helpItem;
JMenuItem aboutItem;
JMenuItem slowItem;
JMenuItem midItem;
JMenuItem fastItem;
public SnakeFrame() {
init();
ActionListener l = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getSource() == pauseItem)
snake.isRun = false;
if (e.getSource() == beginItem)
snake.isRun = true;
if (e.getSource() == newItem) {
newGame();
}
// ------------菜单控制运行速度
if (e.getSource() == slowItem) {
snake.speed = Snake.SLOW;
speedLabel.setText("Slow");
}
if (e.getSource() == midItem) {
snake.speed = Snake.MID;
speedLabel.setText("Mid");
}
if (e.getSource() == fastItem) {
snake.speed = Snake.FAST;
speedLabel.setText("Fast");
}
}
};
pauseItem.addActionListener(l);
beginItem.addActionListener(l);
newItem.addActionListener(l);
aboutItem.addActionListener(l);
slowItem.addActionListener(l);
midItem.addActionListener(l);
fastItem.addActionListener(l);
addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode()) {
// ------------方向键改变蛇运行方向
case KeyEvent.VK_DOWN://
snake.changeDerection(Snake.DOWN);
break;
case KeyEvent.VK_UP://
snake.changeDerection(Snake.UP);
break;
case KeyEvent.VK_LEFT://
snake.changeDerection(Snake.LEFT);
break;
case KeyEvent.VK_RIGHT://
snake.changeDerection(Snake.RIGHT);
break;
// 空格键，游戏暂停或继续
case KeyEvent.VK_SPACE://
if (snake.isRun == true) {
snake.isRun = false;
snake.status = Snake.PAUSED;
break;
}
if (snake.isRun == false) {
snake.isRun = true;
snake.status = Snake.RUNNING;
break;
}
}
}
public void keyReleased(KeyEvent k) {
}
public void keyTyped(KeyEvent k) {
}
});
}
private void init() {
speedLabel = new JLabel();
snake = new Snake();
setSize(380, 460);
setLayout(null);
this.setResizable(false);
bar = new JMenuBar();
gameMenu = new JMenu("Game");
newItem = new JMenuItem("New Game");
gameMenu.add(newItem);
pauseItem = new JMenuItem("Pause");
gameMenu.add(pauseItem);
beginItem = new JMenuItem("Continue");
gameMenu.add(beginItem);
helpMenu = new JMenu("Help");
aboutItem = new JMenuItem("About");
helpMenu.add(aboutItem);
speedMenu = new JMenu("Speed");
slowItem = new JMenuItem("Slow");
fastItem = new JMenuItem("Fast");
midItem = new JMenuItem("Middle");
speedMenu.add(slowItem);
speedMenu.add(midItem);
speedMenu.add(fastItem);
bar.add(gameMenu);
bar.add(helpMenu);
bar.add(speedMenu);
setJMenuBar(bar);
statusLabel = new JLabel();
scoreLabel = new JLabel();
snakePanel = new JPanel();
snakePanel.setBounds(0, 0, 300, 400);
snakePanel.setBorder(BorderFactory.createLineBorder(Color.darkGray));
add(snakePanel);
statusLabel.setBounds(300, 25, 60, 20);
add(statusLabel);
scoreLabel.setBounds(300, 20, 60, 20);
add(scoreLabel);
JLabel temp = new JLabel("状态");
temp.setBounds(310, 5, 60, 20);
add(temp);
temp = new JLabel("分数");
temp.setBounds(310, 105, 60, 20);
add(temp);
temp = new JLabel("速度");
temp.setBounds(310, 55, 60, 20);
add(temp);
speedLabel.setBounds(310, 75, 60, 20);
add(speedLabel);
}
private void newGame() {
this.remove(snakePanel);
this.remove(statusLabel);
this.remove(scoreLabel);
speedLabel.setText("Slow");
statusLabel = new JLabel();
scoreLabel = new JLabel();
snakePanel = new JPanel();
snake = new Snake();
snakePanel = new SnakePanel(snake);
snakePanel.setBounds(0, 0, 300, 400);
snakePanel.setBorder(BorderFactory.createLineBorder(Color.darkGray));
Runnable r1 = new SnakeRunnable(snake, snakePanel);
Runnable r2 = new StatusRunnable(snake, statusLabel, scoreLabel);
Thread t1 = new Thread(r1);
Thread t2 = new Thread(r2);
t1.start();
t2.start();
add(snakePanel);
statusLabel.setBounds(310, 25, 60, 20);
add(statusLabel);
scoreLabel.setBounds(310, 125, 60, 20);
add(scoreLabel);
}
}
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