java贪食蛇教学 java贪吃蛇

要用java写贪吃蛇呢，你要掌握这几个知识点

1、集合的应用,Arraylist。

用来存储蛇块对象的。

2、swing编程

你需要绘制图形界面

3、事件监听

键盘监听和按钮点击事件监听

4、线程或定时器的应用(这里我们就用线程)

5、贪吃蛇的核心算法

(面向对象作为java的基本功在这里就不写出来了)

掌握了这些知识点之后，我们就可以来制作贪吃蛇了

1、创建蛇块对象

蛇块属性有位置位置用x,y表示，

package snakeeat;
public class Snakeact {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x=x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y=y;
}
}
2、创建窗口
package snakeeat;
import javax.swing.*;
public class Snake extends JFrame{
public Snake (){
Snakewin win=new Snakewin();
add(win);
setTitle("贪吃蛇");
setSize (435,390);
setLocation(200,200);
setVisible(true);
}
public static void main(String[] args) {
new Snake();
}
}

3、绘制面板(很多逻辑方法都在这个类里)

package snakeeat;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
public class Snakewin extends JPanel implements ActionListener, KeyListener, Runnable {
JButton newGame, stopGame;//开始和结束的按钮
int score = 0;//分数
int speed = 1;//蛇运动的速度
int rx = 0;//食物的X坐标
int ry = 0;
int num1 = 0, num2 = 0;
int temp = 0;//判断方向
boolean start = false;//判断游戏是否开始
JLabel lable;
List list = new ArrayList();
Random r = new Random();
JDialog die = new JDialog();
JButton ok;
//构造方法，初始化各种值
public Snakewin() {
newGame = new JButton("开始");
stopGame = new JButton("结束");
this.setLayout(new FlowLayout(FlowLayout.LEFT));
newGame.addActionListener(this);
stopGame.addActionListener(this);
this.addKeyListener(this);
this.add(newGame);
this.add(stopGame);
die.setLayout(new GridLayout(2, 1));
ok = new JButton("继续");
ok.addActionListener(this);
die.setSize(200, 200);
die.setLocation(400, 300);
die.add(ok);
die.setVisible(false);
if (start) {
lable = new JLabel("您的分数是：" + score);
die.add(lable);
}
}

//绘制图形界面和蛇

public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawRect(10, 40, 400, 300);
g.drawString("分数:" + score, 150, 20);
g.drawString("速度:" + speed, 150, 35);
g.setColor(new Color(0, 255, 0));
if (start) {
g.fillRect(10 + rx * 10, 40 + ry * 10, 10, 10);
g.setColor(new Color(255, 0, 0));
for (int i = 0; i < list.size(); i++) {
g.fillRect(10 + list.get(i).getX() * 10, 40 + list.get(i).getY() * 10, 10, 10);
}
eat();
}
}

//吃食物的方法

public void eat() {
if (list.size() != 0) {
if (list.get(0).getX() == rx && list.get(0).getY() == ry) {
score++;
if (score % 10 == 0) {
speed++;
}
rx = r.nextInt(40);
ry = r.nextInt(30);
Snakeact tempAct = new Snakeact();
tempAct.setX(list.get(list.size() - 1).getX());
tempAct.setY(list.get(list.size() - 1).getY());
list.add(tempAct);
}
}
}

//蛇身移动方法

public void sonMove() {
Snakeact tempAct = new Snakeact();
for (int i = 0; i < list.size(); i++) {
if (i == 1) {
list.get(i).setX(list.get(0).getX());
list.get(i).setY(list.get(0).getY());
} else if (i > 1) {
tempAct = list.get(i - 1);
list.set(i - 1, list.get(i));
list.set(i, tempAct);
}
}
}

//蛇头移动方法

public void move(int x, int y) {
if (list.size() != 0) {
if (minYes(x, y)) {
sonMove();
list.get(0).setX(list.get(0).getX() + x);
list.get(0).setY(list.get(0).getY() + y);
} else {
die.setVisible(true);
}
}
}

//按钮事件监听

public void actionPerformed(ActionEvent e) {
if (e.getSource() == newGame) {
newGame.setEnabled(false);
start = true;
rx = r.nextInt(40);
ry = r.nextInt(30);
Snakeact tempAct = new Snakeact();
tempAct.setX(20);
tempAct.setY(15);
list.add(tempAct);
requestFocus(true);
Thread mThread = new Thread(this);
mThread.start();
repaint();
}
if (e.getSource() == stopGame) {
System.exit(0);
}
if (e.getSource() == ok) {
list.clear();
newGame.setEnabled(true);
die.setVisible(false);
score = 0;
speed = 1;
}
}
public boolean minYes(int x, int y) {
if (list.size() != 0) {
if (!maxYes(list.get(0).getX() + x, list.get(0).getY() + y)) {
return false;
}
}
return true;
}

//判断是否出界

public boolean maxYes(int x, int y) {
if (x < 0 || x >= 40 || y < 0 || y >= 30) {
return false;
}
for (int i = 0; i < list.size(); i++) {
if (i > 1 && list.get(i).getX() == list.get(0).getX() && list.get(i).getY() == list.get(0).getY()) {
return false;
}
}
return true;
}

//键盘敲击事件监听

public void keyPressed(KeyEvent e) {
if (start) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP:
if (temp != 2) {
move(0, -1);
temp = 1;
}
repaint();
break;
case KeyEvent.VK_DOWN:
if (temp != 1) {
move(0, 1);
temp = 2;
}
repaint();
break;
case KeyEvent.VK_LEFT:
if (temp != 4) {
move(-1, 0);
temp = 3;
}
repaint();
break;
case KeyEvent.VK_RIGHT:
if (temp != 3) {
move(1, 0);
temp = 4;
}
repaint();
break;
default:
break;
}
}
}
@Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyReleased(KeyEvent e) {
}

//线程的run方法

public void run() {
while (start) {
switch (temp) {
case 1:
move(0, -1);
break;
case 2:
move(0, 1);
break;
case 3:
move(-1, 0);
break;
case 4:
move(1, 0);
break;
default:
move(1, 0);
break;
}
repaint();
try {
Thread.sleep(600 / speed);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

每一点都是一个类哦

效果图