该博客详细介绍了如何用Java编程实现一个贪吃蛇游戏，包括游戏的基本功能如随机生成食物、控制蛇移动、碰撞检测（边界、自身）以及游戏结束条件。游戏还具备了欢迎界面、游戏界面和结束界面，并且加入了声音效果，玩家吃到食物时和游戏结束时会播放不同音效。此外，游戏界面展示了实时的得分和游戏时间。
完整版代码如下
实现贪吃蛇游戏基本功能，屏幕上随机出现一个“食物”，称为豆子，上下左右控制“蛇”的移动，吃到“豆子”以后“蛇”的身体加长一点,得分增加，“蛇”碰到边界或，蛇头与蛇身相撞，蛇死亡，游戏结束。为游戏设计初始欢迎界面，游戏界面，游戏结束界面。
import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;
import java.util.Random;
import javax.sound.sampled.*;
import javax.swing.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.Random;
class Tile{
int x;
int y;
public Tile(int x0,int y0){
x = x0;
y = y0;
}
}
class AePlayWave extends Thread {
private String filename;
private final int EXTERNAL_BUFFER_SIZE = 524288; // 128Kb
public AePlayWave(String wavfile) {
filename = wavfile;
}
public void run() {
File soundFile = new File(filename);
AudioInputStream audioInputStream = null;
try {
audioInputStream = AudioSystem.getAudioInputStream(soundFile);
} catch (UnsupportedAudioFileException e1) {
e1.printStackTrace();
return;
} catch (IOException e1) {
e1.printStackTrace();
return;
}
AudioFormat format = audioInputStream.getFormat();
SourceDataLine auline = null;
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
try {
auline = (SourceDataLine) AudioSystem.getLine(info);
auline.open(format);
} catch (LineUnavailableException e) {
e.printStackTrace();
return;
} catch (Exception e) {
e.printStackTrace();
return;
}
auline.start();
int nBytesRead = 0;
byte[] abData = new byte[EXTERNAL_BUFFER_SIZE];
try {
while (nBytesRead != -1) {
nBytesRead = audioInputStream.read(abData, 0, abData.length);
if (nBytesRead >= 0)
auline.write(abData, 0, nBytesRead);
}
} catch (IOException e) {
e.printStackTrace();
return;
} finally {
auline.drain();
auline.close();
}
}
}
public class Snake extends JComponent {
private static final long serialVersionUID = 3794762291171148906L;
private final int MAX_SIZE = 400;//蛇身体最长为400节
private Tile temp = new Tile(0, 0);
private Tile temp2 = new Tile(0, 0);
private Tile head = new Tile(227, 100);//头部的位置初始化为(227,100)
private Tile[] body = new Tile[MAX_SIZE];
private String direction = "R";//默认向右走
private String current_direction = "R";//当前方向
private boolean first_launch = false;
private boolean iseaten = false;
private boolean isrun = true;
private int randomx, randomy;
private int body_length = 4;//身体长度初始化为5
private Thread run;
private JLabel label = new JLabel("当前长度：");
private JLabel label2 = new JLabel("所花时间：");
private JLabel label3 = new JLabel("说 明：");
private JTextArea explain = new JTextArea("此游戏是一个贪吃蛇Demo版本，实现简单地移动，得分，判断撞墙和撞自己的功能，"
+ "初始长度为6，头部为蓝，身体的颜色为黄色。\n"
+ "游戏界面按上下左右键实现移动");
private JLabel Score = new JLabel("6");
private JLabel Time = new JLabel("");
private Font f = new Font("微软雅黑", Font.PLAIN, 15);
private Font f2 = new Font("微软雅黑", Font.PLAIN, 13);
private JPanel p = new JPanel();
private int hour = 0;
private int min = 0;
private int sec = 0;
private boolean pause = false;
public Snake() {
//布局
add(label);
label.setBounds(500, 10, 80, 20);
label.setFont(f);
add(Score);
Score.setBounds(500, 35, 80, 20);
Score.setFont(f);
add(label2);
label2.setBounds(500, 60, 80, 20);
label2.setFont(f);
add(Time);
Time.setBounds(500, 85, 80, 20);
Time.setFont(f);
add(p);
p.setBounds(498, 110, 93, 1);
p.setBorder(BorderFactory.createLineBorder(Color.black));
add(label3);
label3.setBounds(500, 115, 80, 20);
label3.setFont(f);
add(explain);
explain.setBounds(498, 138, 100, 350);
explain.setFont(f2);
explain.setLineWrap(true);
explain.setOpaque(false);
for (int i = 0; i < MAX_SIZE; i++) {
body[i] = new Tile(0, 0);
}
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
super.keyPressed(e);
if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
if (isrun && current_direction != "L") {
direction = "R";
}
}
if (e.getKeyCode() == KeyEvent.VK_LEFT) {
if (isrun && current_direction != "R") {
direction = "L";
}
}
if (e.getKeyCode() == KeyEvent.VK_UP) {
if (isrun && current_direction != "D") {
direction = "U";
}
}
if (e.getKeyCode() == KeyEvent.VK_DOWN) {
if (isrun && current_direction != "U") {
direction = "D";
}
}
if (e.getKeyCode() == KeyEvent.VK_ESCAPE) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int i = 0; i < MAX_SIZE; i++) {
body[i].x = 0;
body[i].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
}
if (e.getKeyCode() == KeyEvent.VK_SPACE)//按空格键开始和暂停暂时没做，还在思考中
{
if (!pause)//暂停
{
pause = true;
isrun = false;
} else//开始
{
pause = false;
isrun = true;
}
}
}
});
new Timer();
setFocusable(true);
}
public void paintComponent(Graphics g1) {
super.paintComponent(g1);
Graphics2D g = (Graphics2D) g1;
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_NORMALIZE);
//画头部
g.setColor(Color.blue);
g.fillRoundRect(head.x, head.y, 20, 20, 10, 10);
g.setPaint(new GradientPaint(115, 135, Color.orange, 230, 135, Color.orange, true));
if (!first_launch) {
//初始化身体
int x = head.x;
for (int i = 0; i < body_length; i++) {
x -= 22;//相邻两个方块的间距为2个像素，方块宽度都为20像素
body[i].x = x;
body[i].y = head.y;
g.fillRoundRect(body[i].x, body[i].y, 20, 20, 10, 10);
}
//初始化食物位置
ProduceRandom();
g.fillOval(randomx, randomy, 19, 19);
} else {
//每次刷新身体
for (int i = 0; i < body_length; i++) {
g.fillRoundRect(body[i].x, body[i].y, 20, 20, 10, 10);
}
if (EatFood())//被吃了重新产生食物
{
ProduceRandom();
g.fillOval(randomx, randomy, 19, 19);
iseaten = false;
} else {
g.fillOval(randomx, randomy, 19, 19);
}
}
first_launch = true;
//墙
g.setStroke(new BasicStroke(4, BasicStroke.CAP_BUTT, BasicStroke.JOIN_BEVEL));
g.setBackground(Color.white);
g.drawRect(2, 7, 491, 469);
}
public void ProduceRandom() {
boolean flag = true;
Random rand = new Random();
randomx = (rand.nextInt(21) + 1) * 22 + 7;
randomy = (rand.nextInt(20) + 1) * 22 + 12;
while (flag) {
for (int i = 0; i < body_length; i++) {
if (body[i].x == randomx && body[i].y == randomy) {
randomx = (rand.nextInt(21) + 1) * 22 + 7;
randomy = (rand.nextInt(20) + 1) * 22 + 12;
flag = true;
break;
} else {
if (i == body_length - 1) {
flag = false;
}
}
}
}
}
public void HitWall() {//判断是否撞墙
if (current_direction == "L") {
if (head.x < 7) {
new AePlayWave("over.wav").start();
isrun = false;
int result = JOptionPane.showConfirmDialog(null, "Game over! Try again?", "Information", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_NO_OPTION) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int i = 0; i < MAX_SIZE; i++) {
body[i].x = 0;
body[i].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
} else {
System.exit(0);
}
}
}
if (current_direction == "R") {
if (head.x > 489) {
new AePlayWave("over.wav").start();
isrun = false;
int result = JOptionPane.showConfirmDialog(null, "Game over! Try again?", "Information", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_NO_OPTION) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int i = 0; i < MAX_SIZE; i++) {
body[i].x = 0;
body[i].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
} else {
System.exit(0);
}
}
}
if (current_direction == "U") {
if (head.y < 12) {
new AePlayWave("over.wav").start();
isrun = false;
int result = JOptionPane.showConfirmDialog(null, "Game over! Try again?", "Information", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_NO_OPTION) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int i = 0; i < MAX_SIZE; i++) {
body[i].x = 0;
body[i].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
} else {
System.exit(0);
}
}
}
if (current_direction == "D") {
if (head.y > 472) {
new AePlayWave("over.wav").start();
isrun = false;
int result = JOptionPane.showConfirmDialog(null, "Game over! Try again?", "Information", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_NO_OPTION) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int i = 0; i < MAX_SIZE; i++) {
body[i].x = 0;
body[i].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
} else {
System.exit(0);
}
}
}
}
public void HitSelf() {//判断是否撞到自己身上
for (int i = 0; i < body_length; i++) {
if (body[i].x == head.x && body[i].y == head.y) {
new AePlayWave("over.wav").start();
isrun = false;
int result = JOptionPane.showConfirmDialog(null, "Game over! Try again?", "Information", JOptionPane.YES_NO_OPTION);
if (result == JOptionPane.YES_NO_OPTION) {
direction = "R";//默认向右走
current_direction = "R";//当前方向
first_launch = false;
iseaten = false;
isrun = true;
body_length = 5;
head = new Tile(227, 100);
Score.setText("6");
hour = 0;
min = 0;
sec = 0;
for (int j = 0; j < MAX_SIZE; j++) {
body[j].x = 0;
body[j].y = 0;
}
run = new Thread();
run.start();
System.out.println("Start again");
} else {
System.exit(0);
}
break;
}
}
}
public boolean EatFood() {
if (head.x == randomx && head.y == randomy) {
iseaten = true;
return true;
}
else {
return false;
}
}
public void Thread() {
long millis = 150;//每隔150毫秒刷新一次
run = new Thread() {
public void run() {
while (true) {
try {
Thread.sleep(millis);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
if (!pause) {
temp.x = head.x;
temp.y = head.y;
//头部移动
if (direction == "L") {
head.x -= 22;
}
if (direction == "R") {
head.x += 22;
}
if (direction == "U") {
head.y -= 22;
}
if (direction == "D") {
head.y += 22;
}
current_direction = direction;//刷新当前前进方向
//身体移动
for (int i = 0; i < body_length; i++) {
temp2.x = body[i].x;
temp2.y = body[i].y;
body[i].x = temp.x;
body[i].y = temp.y;
temp.x = temp2.x;
temp.y = temp2.y;
}
if (EatFood()) {
body_length++;
body[body_length - 1].x = temp2.x;
body[body_length - 1].y = temp2.y;
Score.setText("" + (body_length + 1));
new AePlayWave("eat.wav").start();
}
repaint();
HitWall();
HitSelf();
}
}
}
};
run.start();
}
public static void main(String[] args) {
Snake t = new Snake();
t.Thread();
JFrame game = new JFrame();
Image img = Toolkit.getDefaultToolkit().getImage("title.png");//窗口图标
game.setIconImage(img);
game.setTitle("Snake");
game.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// game.setSize(502, 507);
game.setSize(602, 507);
game.setResizable(false);
game.setLocationRelativeTo(null);
game.add(t);
game.setVisible(true);
}
//计时器类
class Timer extends Thread {
public Timer() {
this.start();
}
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
if (isrun) {
sec += 1;
if (sec >= 60) {
sec = 0;
min += 1;
}
if (min >= 60) {
min = 0;
hour += 1;
}
showTime();
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
private void showTime() {
String strTime = "";
if (hour < 10)
strTime = "0" + hour + ":";
else
strTime = "" + hour + ":";
if (min < 10)
strTime = strTime + "0" + min + ":";
else
strTime = strTime + "" + min + ":";
if (sec < 10)
strTime = strTime + "0" + sec;
else
strTime = strTime + "" + sec;
//在窗体上设置显示时间
Time.setText(strTime);
}
}
}思想如下;
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