贪吃蛇java课程设计

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Snake extends JFrame {

private JPanel contentPane; //窗体内容网格

private JButton btnStart = new JButton("开始"); //游戏开始按钮

private JButton btnPause = new JButton("暂停"); //游戏暂停按钮

private JButton btnExit = new JButton("退出"); //游戏退出按

private JPanel pnlTop = new JPanel(); //顶部按钮和分数面板

private JPanel pnlLeft = new JPanel(); //左侧面板

private JPanel playPanel = new JPanel(); //游戏区面板

private BorderLayout borderLayout1 = new BorderLayout(); //容器布局管理器private BorderLayout borderLayout2 = new BorderLayout();

private GridLayout rbtnLayout = new GridLayout(10, 1, 1, 1);

private static final int UP = 1,LEFT = 2,DOWN = 3,RIGHT = 4;//蛇运动方向private static final int ROWS = 30; //游戏区行数

private static final int COLS = 50; //游戏区列数

private boolean isPause = false; //游戏暂停标志

private boolean isEnd; //游戏结束标志

private SnakeBody snake; //贪食蛇

private int score = 0; //当前得分

SnakeThread thread = new SnakeThread(); //游戏主线程

private GridLayout grid1 = new GridLayout(ROWS,COLS,0,0); //游戏区布局private JButton[][] blocks; //游戏区的所有方块

JPanel jPanel2 = new JPanel();

JLabel jLabel1 = new JLabel("得分：");

JLabel lblScroe = new JLabel("0");

ButtonGroup buttonGroup1 = new ButtonGroup();

JRadioButton rbtnLow = new JRadioButton("初级", true);

JRadioButton rbtnMid = new JRadioButton("中级");

JRadioButton rbtnHigh = new JRadioButton("高级");

public Snake() {

super("贪食蛇游戏");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

contentPane = (JPanel)this.getContentPane();

contentPane.setLayout(borderLayout2);

this.setResizable(false);

this.setSize(new Dimension(512, 414));

keyAction keyAct = new keyAction();

this.addKeyListener(keyAct);

btnStart.addKeyListener(keyAct);

btnPause.addKeyListener(keyAct);

btnExit.addKeyListener(keyAct);

rbtnLow.addKeyListener(keyAct);

rbtnMid.addKeyListener(keyAct);

rbtnHigh.addKeyListener(keyAct);

btnAction btnAct = new btnAction();

btnStart.addActionListener(btnAct);

btnPause.addActionListener(btnAct);

btnExit.addActionListener(btnAct);

rbtnLow.addActionListener(btnAct);

rbtnMid.addActionListener(btnAct);

rbtnHigh.addActionListener(btnAct);

pnlLeft.setLayout(borderLayout1);

playPanel.setLayout(grid1);

playPanel.setBackground(Color.white);

playPanel.setBorder(BorderFactory.createEtchedBorder()); jPanel2.setLayout(rbtnLayout);

buttonGroup1.add(rbtnLow);

buttonGroup1.add(rbtnMid);

buttonGroup1.add(rbtnHigh);

rbtnLow.setSelected(true);

pnlLeft.add(playPanel);

pnlLeft.add(jPanel2, BorderLayout.WEST);

jPanel2.add("f1", rbtnLow);

jPanel2.add("f2", rbtnMid);

jPanel2.add("f3", rbtnHigh);

pnlTop.add(btnStart);

pnlTop.add(btnPause);

pnlTop.add(btnExit);

pnlTop.add(jLabel1);

pnlTop.add(lblScroe);

contentPane.add(pnlTop, BorderLayout.NORTH); contentPane.add(pnlLeft, BorderLayout.CENTER);

//创建并初始化游戏区方块

blocks = new JButton[ROWS][COLS];

for (int i = 0; i < ROWS; i++) {

for (int j = 0; j < COLS; j++) {

blocks[i][j] = new JButton();

blocks[i][j].setBackground(Color.lightGray);

blocks[i][j].setV isible(false);

playPanel.add(blocks[i][j]);

}

}

}

public static void main(String[] args) {

Snake app = new Snake();

app.validate();

app.setV isible(true);

}

public void start() {

snake = new SnakeBody(); //创建蛇身

if (rbtnLow.isSelected())

snake.setSpeed(300);

if (rbtnMid.isSelected())

snake.setSpeed(200);

if (rbtnHigh.isSelected())

snake.setSpeed(100);

score = 0;

isPause = false;

isEnd = false; //

btnPause.setText("暂停");

//初始化游戏区

for (int i = 0; i < ROWS; i++) {

for (int j = 0; j < COLS; j++) {

blocks[i][j].setBackground(Color.lightGray);

blocks[i][j].setV isible(false);

}

}

//在游戏区内随机放置豆

int x = (int) (Math.random() * ROWS);

int y = (int) (Math.random() * COLS);

while (blocks[x][y].isVisible()) {

x = (int) (Math.random() * ROWS);

y = (int) (Math.random() * COLS);

}

blocks[x][y].setBackground(Color.yellow);

blocks[x][y].setV isible(true);

try {

thread.start();

}

catch (IllegalThreadStateException illegalThreadStateException) {} }

class SnakeBody {

public int row[];

public int col[];

public int len = 3, direction = RIGHT, lastdirection = RIGHT; public long speed = 300;

public SnakeBody() {

len = 3;

direction = RIGHT;

lastdirection = RIGHT;

row = new int[ROWS];

col = new int[COLS];

for (int i = 0; i <= len; i++) {

row[i] = 1;

col[i] = len - i;

}

}

public void setSpeed(int s) {

speed = s;

}

public void move() {

blocks[row[len]][col[len]].setV isible(false); //去掉蛇尾

blocks[row[len]][col[len]].setBackground(Color.white); //修改颜色//显示蛇身

for (int i = 0; i < len; i++) {

blocks[row[i]][col[i]].setBackground(Color.green);

blocks[row[i]][col[i]].setV isible(true);

}

//移动蛇身

for (int i = len; i > 0; i--) {

row[i] = row[i - 1];

col[i] = col[i - 1];

}

//根据蛇身运动方向，决定蛇头位置

switch (direction) {

case UP: {

if (lastdirection == DOWN)

row[0] += 1;

else {

row[0] -= 1;

lastdirection = UP;

}

break;

}

case LEFT: {

if (lastdirection == RIGHT)

col[0] += 1;

else {

col[0] -= 1;

lastdirection = LEFT;

}

break;

}

case DOWN: {

if (lastdirection == UP)

row[0] -= 1;

else {

row[0] += 1;

lastdirection = DOWN;

}

break;

}

case RIGHT: {

if (lastdirection == LEFT)

col[0] -= 1;

else {

col[0] += 1;

lastdirection = RIGHT;

}

break;

}

}

//当蛇头碰到墙时,蛇头碰到蛇身时,游戏结束

if (row[0] >= ROWS || row[0] < 0 || col[0] >= COLS || col[0] < 0 ||

blocks[row[0]][col[0]].getBackground().equals(Color.green)) {

isEnd = true;

JOptionPane.showMessageDialog(null, "游戏结束!");

}

//吃豆

if (blocks[row[0]][col[0]].getBackground().equals(Color.yellow)) {

score += 100;

lblScroe.setText(Integer.toString(score));

if (score % 2000 == 0 && speed > 100) {

JOptionPane.showMessageDialog(null, "恭喜你过关了，准备进入下一关");

speed -= 100;

if (speed == 200)

rbtnMid.setSelected(true);

if (speed == 100)

rbtnHigh.setSelected(true);

}

}

//吃豆后,蛇身加长,并随机显示下一个豆

if (blocks[row[0]][col[0]].getBackground().equals(Color.yellow)) {

len++;

int x, y;

x = (int) (Math.random() * ROWS);

y = (int) (Math.random() * COLS);

while (blocks[x][y].isVisible()) {

x = (int) (Math.random() * ROWS);

y = (int) (Math.random() * COLS);

}

blocks[x][y].setBackground(Color.yellow);

blocks[x][y].setV isible(true);

}

blocks[row[0]][col[0]].setBackground(Color.green);

blocks[row[0]][col[0]].setV isible(true); //显示蛇头}

}

class SnakeThread extends Thread {

public void run() {

while (true) {

try {

Thread.sleep(snake.speed); //控制移动速度

if (!isEnd && !isPause) {

snake.move(); //移动蛇身

}

if (isEnd) { //游戏结束

btnStart.setEnabled(true);

}

}

catch (Exception ex) {}

}

}

}

class keyAction extends KeyAdapter {

public void keyPressed(KeyEvent e) {

if (!isEnd && !isPause) {

//根据用户按键，设置蛇运动方向

if (e.getKeyCode() == KeyEvent.VK_UP) {

snake.direction = UP;

}

if (e.getKeyCode() == KeyEvent.VK_DOWN) {

snake.direction = DOWN;

}

if (e.getKeyCode() == KeyEvent.VK_LEFT) {

snake.direction = LEFT;

}

if (e.getKeyCode() == KeyEvent.VK_RIGHT) {

snake.direction = RIGHT;

}

}

}

}

//按钮监听响应处理类

private class btnAction implements ActionListener { public void actionPerformed(ActionEvent ae) {

Object source = ae.getSource();

if (source.equals(btnStart)) {

btnStart.setEnabled(false);

start();

}

if (source.equals(btnPause)) {

if (isPause == true) {

btnPause.setText("暂停");

}

if (isPause == false) {

btnPause.setText("继续");

}

isPause = !isPause;

}

if (source.equals(btnExit)) {

System.exit(0);

}

if (source.equals(rbtnLow)) {

snake.setSpeed(300);

}

if (source.equals(rbtnMid)) {

snake.setSpeed(200);

}

if (source.equals(rbtnHigh)) {

snake.setSpeed(100);

}

}

}

}