java贪吃蛇（障碍物*咬尾巴）

来源：互联网发布：西安行知教育集团编辑：程序博客网时间：2024/04/29 13:05

运行场景

穿墙图片

游戏结束

ArrayList的各种方法addAll(),add(),remove(),clear()，与数组的区别退出：System.exit(0);JPanel的paintComponent(Graphics g)方法，有GUI系统调用，或者调用JPanel.repaint()重绘KeyListener监听按键事件，非数字去方向键为VK_DOWN..数字区方向键为VK_PK_...Timer time=new Timer(delay,listenr)time.start()time.stop()开启后listener持续监听相应事件，每隔delay段时间刷新感觉像是写的面向方法的程序，只有一个类和内部类，其余全是方法^^

Snake.java

import java.awt.Color.*;import javax.swing.*;import java.awt.*;import java.util.ArrayList;import javax.swing.Timer.*;import java.awt.event.*;import javax.swing.JComponent.*;public class Snake{    JFrame frame;    MyPanel panel;    ArrayList<Item> snake;//蛇体    Item food;//食物    int dir;//行进方向    static int UP=-1;    static int DOWN=1;    static int LEFT=-10;    static int RIGHT=10;    static int l=10;//长度    boolean lose=false;//是否输了    int width=300;//待定    int height=300;    int score=0;//分数    int randX=0;//任意选中的x坐标    int randY=0;//任意选中的y坐标    boolean has;//是否被占用,true则为占用    public static void main(String[] args){        Snake test=new Snake();        test.init();}//界面初始化    public void init(){        if(food!=null)            food=null;//protected     snake.removeRange(0,snake.size());         snake=new ArrayList<Item>();        if(!snake.isEmpty()){            dir=0;            snake.clear();}        if(frame==null)            frame=new JFrame();        if(panel==null)            panel=new MyPanel();        if(time.isRunning())            time.stop();//      panel.repaint();//      snake=new ArrayList<Item>();//              addFood();                food=new Item(13,5);                addSnake();        panel.addKeyListener(key);        panel.setFocusable(true);//              addFood();//                panel.repaint();        frame.getContentPane().add(panel);//      frame.addActionListener(listen);        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        frame.setSize(width,height);        frame.setVisible(true);        panel.repaint();        }//获取随机位置    public void random(){    //  boolean canUse=false;    //  int randX;    //  int randY;        while(true){            randX=(int)(Math.random()*28);            randY=(int)(Math.random()*29);            if(!include(randX,randY)){            //  canUse=true;                break;}}}//位置是否已经被占用,true为被占用    public boolean include(int loaX,int loaY){          boolean contain=false;        for(Item it:snake){            if(it.equals(loaX,loaY)){                contain=true;                break;}}        if(food.equals(loaX,loaY))            contain=true;        return contain;}//吃food,如果has为true表示已经吃到了食物    public void eat(Item pos){        int x=pos.getX();        int y=pos.getY();        has=false;        if(food.equals(x,y)){            has=true;    //      food=null;            addFood();}}//增加snake    public void addSnake(){        random();        Item one=new Item(randX,randY);         snake.add(0,one);}//增加food    public void addFood(){        score++;        random();        food=new Item(randX,randY);}//前进    public void forward(int d){        Item head=snake.get(0);        int x=head.getX()+dir/10;        int y=head.getY()+dir%10;        System.out.println("forward");        head=new Item(x,y);        snake.add(0,head);//添加头部        eat(head);//判断是否吃到了食物        if(!has){//如果没有吃到食物，去掉最后一个item            snake.remove(snake.size()-1);}       lose();        if(lose==true){            System.out.println("start()");            lose=false;            start();}}//JFrame的ActionListener     ActionListener listen=new ActionListener(){        public void actionPerformed(ActionEvent e){            System.out.println("调用ActionPerformed");            forward(dir);            panel.repaint();//重绘}};//刷新频率    Timer time=new Timer(230,listen);//KeyListener    KeyListener key=new KeyListener(){        public void keyPressed(KeyEvent k){        //  System.out.println("引用keyPress");            if(k.getKeyCode()==KeyEvent.VK_UP){                if(dir!=Snake.DOWN)                    dir=Snake.UP;}            if(k.getKeyCode()==KeyEvent.VK_DOWN){                if(dir!=Snake.UP)                    dir=Snake.DOWN;//  }                   }            if(k.getKeyCode()==KeyEvent.VK_LEFT){                if(dir!=Snake.RIGHT)                    dir=Snake.LEFT;}            if(k.getKeyCode()==KeyEvent.VK_RIGHT){                if(dir!=Snake.LEFT)                    dir=Snake.RIGHT;}        //  System.out.println("调用forward(dir)");        //  System.out.println(dir);        //  forward(dir);            time.start();        //  panel.repaint();}        public void keyReleased(KeyEvent k){}        public void keyTyped(KeyEvent k){}};//重绘    class MyPanel extends JPanel{                public void paintComponent(Graphics g){            //刷新背景 heise            System.out.println("调用paintComponent");            g.setColor(Color.white);            g.fillRect(0,0,this.getWidth(),this.getHeight());                   System.out.println(this.getWidth()+"    "+this.getHeight());                //蛇身红色            g.setColor(Color.yellow);            g.fillRect(290,0,l,this.getHeight());            int red=(int)(Math.random()*255);            int green=(int)(Math.random()*255);            int blue=(int)(Math.random()*255);            g.setColor(new Color(red,green,blue));              for(Item items:snake){                int posX=items.getX();                int posY=items.getY();                if(posX>=29){                    System.out.println("posX大于29,lose=true");                    lose=true;}                if(posX<=0)                    items.setX(28);                if(posY>=29)                    items.setY(0);                if(posY<=0)                    items.setY(29);        //      System.out.println(i+"    "+posY);                //待会在设置位置，大小                g.fillOval(items.getX()*l,items.getY()*l,l,l);}            //食物为绿色            g.setColor(Color.green);            int foodX=food.getX();            int foodY=food.getY();            //同上            g.fillOval(foodX*l,foodY*l,l,l);}}//判断是否输了  返回true则输了    public void lose(){          int oneX=snake.get(0).getX();                  int oneY=snake.get(0).getY();                        for(int i=1;i<snake.size();i++){                                if(snake.get(i).equals(oneX,oneY)){                                        System.out.println("你输了！");                    lose=true;                                        break;  }}    System.out.println("lose()"+lose);}    public void start(){         int isRestart = JOptionPane.showConfirmDialog(frame,"分数："+score+" 是否重新开始？", "重新开始", JOptionPane.YES_NO_OPTION);                       score=0;        if (isRestart == JOptionPane.YES_OPTION) {            init();                        }else{                            System.exit(0);}}//Item类    class Item{        int xPos;//item的x坐标        int yPos;//y坐标        public Item(int x,int y){            this.xPos=x;            this.yPos=y;}        public int getX(){            return xPos;}        public int getY(){            return yPos;}        public void setX(int x){            xPos=x;}        public void setY(int y){            yPos=y;}//判断两个坐标是否相等，true为相等        public boolean equals(int aX,int aY){            if((aX==xPos)&&(aY==yPos)){                return true;}            else{                return false;}}}}

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