java贪吃蛇简单版

游戏思路

步骤1：实现静态的蛇

蛇的类（初始化部分）：
地图类：

重写的绘制方法：

步骤2：通过键盘让蛇移动起来

蛇的移动方法：

键盘监听事件：

步骤3：通过定时器让蛇移动起来

创建并使用定时器：

步骤4：添加生成点的方法

节点的类

食物继承节点，并重写构造方法。

步骤5：吃东西的方法

在移动的基础上将删除的尾节点复原

步骤6：死亡

两种死亡条件

代码汇总

package com.company; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.Random; public class Main { public static void main(String[] args) { new Map().addGame(new Game()); } } class Node { int x; int y;     Node nextNode; public Node(){} public Node(int x,int y){ this.x = x; this.y = y; } } class Food extends Node { public Food(){         x = new Random().nextInt(39);         y = new Random().nextInt(38); } } class Snake {     Node head;     Node tail;     Node hid = null; //当前方向 int dir=-1; //下一次移动的方向 int nextDir=-1; public Snake(){ //初始化蛇身 this.head = new Node(5,6); this.head.nextNode = new Node(5,7); this.head.nextNode.nextNode = new Node(5,8); this.tail = this.head.nextNode.nextNode; this.tail.nextNode = this.hid; } public void eatFood(){         tail = hid;         hid = null; } public void move() { //1:左  -1:右 2:上 3：下 if (nextDir != -dir) {             dir = nextDir; } else if (nextDir==dir) { return; } //增加头结点         Node node = null; switch (dir) { case 1:  node = new Node(head.x-1, head.y);break; case -1: node = new Node(head.x+1, head.y);break; case 2:  node = new Node(head.x, head.y-1);break; case -2: node = new Node(head.x, head.y+1);break; }         node.nextNode = head;         head = node; //删除尾节点         node = head; while(node!=null) { if (node.nextNode == tail) {                 tail = node;                 hid = tail.nextNode; break; }             node = node.nextNode; } } } class Map extends JFrame {     JFrame jFrame; public Map(){         jFrame = new JFrame("贪吃蛇");         jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);         jFrame.setVisible(true);         jFrame.setBounds(200,200,600,615);         jFrame.setResizable(false); } public void addGame(Game game) {         jFrame.add(game);         game.requestFocus(); } } class Game extends JPanel {     Snake snake = new Snake();     Food food = new Food(); int unit = 15;     Timer timer; {         ActionListener actionListener = new ActionListener() { @Override public void actionPerformed(ActionEvent e) {                 snake.move(); checkCollide(); repaint(); } };         timer = new Timer(100,actionListener);         timer.start();         KeyListener keyListener = new KeyListener(){ @Override public void keyTyped(KeyEvent e) { } @Override public void keyPressed(KeyEvent e) { switch (e.getKeyCode()) { case KeyEvent.VK_UP:                         snake.nextDir = 2; break; case KeyEvent.VK_DOWN:                         snake.nextDir = -2; break; case KeyEvent.VK_LEFT:                         snake.nextDir = 1; break; case KeyEvent.VK_RIGHT:                         snake.nextDir = -1; break; } } @Override public void keyReleased(KeyEvent e) { } }; this.addKeyListener(keyListener); } @Override public void paintComponent(Graphics g) { super.paintComponent(g);         Node node = snake.head; while (node!=snake.tail.nextNode) {             g.setColor(Color.green);             g.fillRoundRect(food.x*unit,food.y*unit,unit,unit,unit,unit);             g.setColor(Color.red);             g.fillRect(node.x*unit,node.y*unit,unit,unit);             node = node.nextNode; } } public void checkCollide(){ if (snake.head.x==food.x&&snake.head.y==food.y) {             snake.eatFood();             food = new Food(); }         Node node = snake.head.nextNode; while(node!=snake.tail.nextNode) { if (snake.head.x==node.x&&snake.head.y==node.y) {                 JOptionPane.showMessageDialog(this,"你碰到了自己的身体","死亡",JOptionPane.WARNING_MESSAGE);                 System.exit(0);                 timer.stop(); } else if (snake.head.x==-1||snake.head.x==39||snake.head.y==-1||snake.head.y==39) {                 JOptionPane.showMessageDialog(this,"你碰到了墙","死亡",JOptionPane.WARNING_MESSAGE);                 System.exit(0);                 timer.stop(); }             node = node.nextNode; } } } 

本次收获和感受

果然学习还是要多敲代码，很多知识是你觉的你会了。但是电脑不要你觉的。还有就是编写代码的时候要细心，不然有时候de了一个小时的bug最后发现是一个单词拼错了会崩溃的哟！