JAVA简易贪吃蛇的实现

原文地址：JAVA简易贪吃蛇的实现 作者：云台听雪

//---主方法-----------------

public class GreedSnake {

public static void main(String[] args) {

SnakeModel model=new SnakeModel();

SnakeControl control=new SnakeControl(model);

SnakeView view=new SnakeView(model,control);

new Thread(model).start();

new Thread(view).start();

}

}

//---SnakeModel------------

import java.util.LinkedList;

import java.util.ListIterator;

import java.util.Random;

public class SnakeModel implements Runnable {

static boolean [][]matrix;

int maxX,maxY;

static int freshTime;

int bufDir;

Node head;

Node food;

public static final int UP=1;

public static final int DOWN=3;

public static final int LEFT=2;

public static final int RIGHT=4;

LinkedList snakeList=new LinkedList();

public Node createFood(){

Random r=new Random();

int x,y;

while(true){

x=r.nextInt(maxX);

y=r.nextInt(maxY);

if(!matrix[x][y]){

break;

}

}

Node n=new Node(x,y,LEFT);

matrix[x][y]=true;

System.out.println("matrix "+x+" "+y);

return n;

}

public SnakeModel(){

head=new Node(2,3,RIGHT);

maxX=30;

maxY=30;

freshTime=200;

matrix=new boolean[maxX][maxY];

snakeList.add(head);

snakeList.add(new Node(2,2,DOWN));

food=createFood();

bufDir=head.drct;

}

public void move(){ 

ListIterator it=snakeList.listIterator();

//吃掉食物

System.out.println("head "+head.x+" "+head.y);

boolean near=false;

switch(head.drct){

case UP:

if(food.x==head.x&&food.y==(head.y-1)){

near=true;

}

break;

case DOWN:

if(food.x==head.x&&food.y==(head.y+1)){

near=true;

}

break;

case LEFT:

if(food.x==(head.x-1)&&food.y==head.y){

near=true;

}

break;

case RIGHT:

if(food.x==(head.x+1)&&food.y==head.y){

near=true;

}

break;

}

if(near){

System.out.println("eat");

snakeList.addFirst(food);

food.drct=head.drct;

head=food;

food=createFood();

near=false;

}

else{

it.next();

while(it.hasNext()){

Node n=it.next();

if(head.x==n.x&&head.y==n.y){

System.out.println("你输了");

System.exit(0);

}

}

while(it.hasPrevious()){

Node n=it.previous();

if(it.hasPrevious()){

if(snakeList.get(it.previousIndex()).xx){

n.drct=LEFT;

}

else if(snakeList.get(it.previousIndex()).x>n.x){

n.drct=RIGHT;

}

else if(snakeList.get(it.previousIndex()).yy){

n.drct=UP;

}

else if(snakeList.get(it.previousIndex()).y>n.y){

n.drct=DOWN;

}

}

}

while(it.hasNext()){

Node n=it.next();

try{

nodeMove(n);

}catch(ArrayIndexOutOfBoundsException e){

System.out.println("你输了");

System.exit(0);

}

}

}

}

public void changeDirection(){

if(Math.abs(bufDir-head.drct)==2){

bufDir=head.drct;

}

else

head.drct=bufDir;

}

public void nodeMove(Node n){

matrix[n.x][n.y]=false;

switch(n.drct){

case UP:

n.y--;

break;

case DOWN:

n.y++;

break;

case LEFT:

n.x--;

break;

case RIGHT:

n.x++;

break;

}

matrix[n.x][n.y]=true;

}

public void run(){

while(true){

changeDirection();

move();

try{

Thread.sleep(freshTime);

}catch(Exception e){}

}

}

}

class Node{

int x;

int y;

int drct;

Node(int x,int y,int direct){

this.x=x;

this.y=y;

drct=direct;

}

}

//---SnakeControl-------------------------

import java.awt.Frame;

import java.awt.event.KeyAdapter;

import java.awt.event.KeyEvent;

public class SnakeControl extends KeyAdapter{

SnakeModel model;

SnakeControl(SnakeModel model){

this.model=model;

}

public void keyPressed(KeyEvent e){

switch(e.getKeyCode()){

case 38:

model.bufDir=SnakeModel.UP;

break;

case 40:

model.bufDir=SnakeModel.DOWN;

break;

case 37:

model.bufDir=SnakeModel.LEFT;

break;

case 39:

model.bufDir=SnakeModel.RIGHT;

}

}

}

//---SnakeView----------------------

import java.awt.Color;

import java.awt.Frame;

import java.awt.Graphics;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

public class SnakeView extends Frame implements Runnable{

int nodeWidth=10;

int nodeHeight=10;

SnakeView(SnakeModel model,SnakeControl control){

model.maxX=model.maxX;

model.maxY=model.maxY;

setSize(model.maxX*nodeWidth+20,model.maxY*nodeHeight+40);

setLocation(300,200);

setVisible(true);

addKeyListener(control);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent e){

System.exit(0);

}

});

setBackground(Color.RED);

setResizable(false);

}

public void repaint(){

Graphics g=getGraphics();

for(int i=0;imatrix.length;i++){

for(int j=0;jmatrix[i].length;j++){

if(SnakeModel.matrix[i][j]){

g.setColor(Color.BLACK);

}

else{

g.setColor(Color.YELLOW);

}

g.fillRect(i*nodeWidth+10, j*nodeHeight+30, nodeWidth-1, nodeHeight-1);

}

}

}

public void run(){

while(true){

try{

Thread.sleep(SnakeModel.freshTime);

}catch(Exception e){

System.out.println("refresh error");

}

repaint();

}

}

}