本文实例为大家分享了java编写的贪吃蛇源码，供大家参考，具体内容如下

程序共包含以下两个文件：

文件:ShellWin.java

import java.awt.Color;

import java.awt.Dimension;

import java.awt.FlowLayout;

import java.awt.Graphics;

import java.awt.event.*;

import javax.swing.Box;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

@SuppressWarnings("serial")

public class ShellWin extends JPanel implements Runnable{ //实现了键盘与鼠标两个接口

int direction;

int length;

int score=0;

boolean control=false;

int[] xs=new int[400]; //蛇的个数，xy,坐标控制

int[] ys=new int[400];

int douX;int douY;

Thread thread;

public ShellWin()

{

setPreferredSize(new Dimension(600, 600));

setLocation(100, 100);

setBackground(Color.GREEN);

thread=new Thread(this); //为这个类添加一个线程

create_snake();

create_bean();

}

public void paintComponent(Graphics g) //绘制

{

super.paintComponent(g); //Jpanel内的方法，起到清屏的作用

g.drawString("分数:"+score, 50, 50);

g.drawRect(0,0, 600, 600);

show_snake(g);

show_bean(g);

}

//能不能吃豆，能不能死

void die()

{

JOptionPane.showMessageDialog(null, "game over", "游戏结束", JOptionPane.ERROR_MESSAGE);

}

void eat()

{

length++;

this.score+=100;

create_bean();

}

boolean out_bounds()

{

if(xs[0]==-10||xs[0]==600||ys[0]==-10||ys[0]==600) //出界即死

{

return true;

}

return false;

}

void change_direction(int new_direction) //控制方向

{

if(direction%2!=new_direction%2||direction==0) // 2 4 3 1 上下左右

{

direction=new_direction;

}

}

boolean eat_self()

{

for (int i = 1; i < length; i++) {

if(xs[0]==xs[i]&&ys[0]==ys[i])

{

return true;

}

}

return false;

}

boolean can_eat()

{

if(xs[0]==douX&&ys[0]==douY)

{

return true;

}

return false;

}

void create_snake()

{

direction=0;length=5;

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

xs[i]=400;

ys[i]=400+10*i;

}

}

void create_bean()

{

douX=10*(int)(Math.random()*60);

douY=10*(int)(Math.random()*60);

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

if(xs[i]==douX&&ys[i]==douY)

{

create_bean();

return;

}

}

}

void show_bean(Graphics g) //仍然得要写入到paintComponent方法内

{

g.setColor(Color.RED);

g.fillOval(douX, douY, 10, 10);

}

void crawl()

{

if(direction!=0)

for (int i = length-1; i >0; i--) { // 2 4 3 1 上下左右

xs[i]=xs[i-1]; //后一个替代前一个 4=3；

ys[i]=ys[i-1];

}

switch (direction) {

case 1:

xs[0]=xs[0]+10;

break;

case 2:

ys[0]=ys[0]-10;

break;

case 3:

xs[0]=xs[0]-10;

break;

case 4:

ys[0]=ys[0]+10;

break;

default:

break;

}

}

void show_snake(Graphics g)

{

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

g.setColor(Color.BLUE);

if(i==0){

g.drawOval(xs[i], ys[i], 10, 10);

continue;

}

g.drawRect(xs[i], ys[i], 10, 10); //蛇的长度与大小

}

}

@Override

public void run() {

while(control)

{

try {

if(can_eat())

{

eat();

}

if(out_bounds())

{

die();

return;

}

if(eat_self())

{

die();

return;

}

crawl();

Thread.sleep(200);

repaint();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

class panel extends JPanel implements ActionListener,KeyListener{

JButton startGame=new JButton("开始");

JButton stopGame=new JButton("停止");

Box box1; //盒式布局

panel(){

setLayout(new FlowLayout());

box1=Box.createHorizontalBox();

box1.add(startGame);

box1.add(Box.createHorizontalStrut(2));

box1.add(stopGame);

setSize(800,800);

setBackground(Color.black);

addKeyListener(this); //为ShellWin 对象注册一个侦听器

startGame.addActionListener(this); //为开始按钮添加侦听器，this指代的是Actionistener这个类所创建的对象

stopGame.addActionListener(this); //为结束按钮添加侦听器，this指代的是Actionistener这个类所创建的对象

}

@Override

public void actionPerformed(ActionEvent e) {

if(e.getSource()==startGame)

{

this.requestFocus(); //将光标添加到该控件中

control=true;

thread.start(); //线程开始

//***********************************

this.repaint(100,100, 600, 600);

}

if(e.getSource()==stopGame)

{

this.requestFocus(); //将光标添加到该控件中

control=false; //线程结束

}

}

@Override

public void keyPressed(KeyEvent e) {

switch (e.getKeyCode()) {

case KeyEvent.VK_UP:

change_direction(2);

break;

case KeyEvent.VK_DOWN:

if(direction!=0)

change_direction(4);

break;

case KeyEvent.VK_LEFT:

change_direction(3);

break;

case KeyEvent.VK_RIGHT:

change_direction(1);

break;

default:

break;

}

}

@Override

public void keyReleased(KeyEvent e) {

// TODO Auto-generated method stub

}

@Override

public void keyTyped(KeyEvent e) {

// TODO Auto-generated method stub

}

}

}

文件:ShellMain.java

import javax.swing.Box;

import javax.swing.JFrame;

@SuppressWarnings("serial")

public class ShellMain extends JFrame {

ShellWin win=new ShellWin();

ShellWin.panel pan=win.new panel();

Box box,box2;

ShellMain(){

box2=Box.createHorizontalBox();

box2.add(win);

box=Box.createVerticalBox();

box.add(pan.box1);

box.add(Box.createVerticalStrut(8));

box.add(box2);

pan.add(box);

setTitle("贪吃蛇");

setSize(800,800);

setVisible(true);

setLayout(null);

add(pan);

setLocation(0,0);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new ShellMain();

}

}

更多精彩游戏，请参考专题《java经典小游戏》

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原文链接：https://blog.csdn.net/qq_35273452/article/details/77621895