java实现贪吃蛇

import java.awt.Color;

import java.awt.GridBagLayout;

import java.awt.event.KeyEvent;

import java.awt.event.KeyListener;

import java.util.LinkedList;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

public class Work2 extends JFrame {

private static LinkedList snake = new LinkedList<>();// 蛇的坐标

private static LinkedList jLabels = new LinkedList<>();// 蛇身

private boolean flag = false;

private int dz = 62;// 初始食物坐标

private int fx = 1;// 初始方向

static {

snake.add(61);

snake.add(60);// 初始蛇坐标

jLabels.add(new JLabel());

jLabels.add(new JLabel());// C初始蛇身

}

public Work2() {

this.setTitle(“贪吃蛇”);

this.setSize(415, 438);

this.setLocation(100, 90);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setLayout(null);

}

void init() {

JPanel jPanel = new JPanel();// 地图

jPanel.setLayout(null);

jPanel.setSize(400, 400);

jPanel.setLocation(0, 0);

jPanel.setBackground(Color.BLACK);

JLabel jLabel = new JLabel();// 食物

// 通过监听键盘来确定上，下，左，右方向

this.addKeyListener(new KeyListener() {

@Override

public void keyTyped(KeyEvent e) {

}

@Override

public void keyReleased(KeyEvent e) {

switch (e.getKeyCode()) {

case KeyEvent.VK_DOWN:

fx = fx == -20 ? -20 : 20;// 如果方向相反则不变

System.out.println(“2”);

break;

case KeyEvent.VK_UP:

fx = fx == 20 ? 20 : -20;

break;

case KeyEvent.VK_LEFT:

fx = fx == 1 ? 1 : -1;

break;

case KeyEvent.VK_RIGHT:

fx = fx == -1 ? -1 : 1;

break;

default:

break;

}

}

@Override

public void keyPressed(KeyEvent e) {

// TODO Auto-generated method stub

}

});

jPanel.add(jLabel);

jPanel.add(jLabels.get(0));

jPanel.add(jLabels.get(1));

this.add(jPanel);

this.setVisible(true);

while (true) {

snake.addFirst(snake.get(0) + fx);

// 蛇头碰到墙游戏结束

if (snake.get(0) < 0 || snake.get(0) > 399 || (fx == 1 && snake.get(0) % 20 == 0)

|| (fx == -1 && snake.get(0) % 20 == 19)) {

JOptionPane.showMessageDialog(null, “游戏结束”);

return;

}

// 蛇头碰到蛇身

for (int i = 1; i < snake.size() - 1; i++) {

if (snake.get(0).equals(snake.get(i))) {

JOptionPane.showMessageDialog(null, “游戏结束”);

return;

}

}

// 判读是否吃到食物

if (snake.get(0) == dz) {

flag = true;

// 吃到的操作

jLabels.addFirst(new JLabel());

jPanel.add(jLabels.get(0));

} else {

// 没吃的操作

snake.removeLast();

}

for (int i = 0; i < snake.size(); i++) {

// 显现蛇

drow(jLabels.get(i), snake.get(i), Color.green);

}

try {

// 速度

Thread.sleep(200);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

// 重新产生食物

if (flag) {

flag = false;

while (true) {

int random = (int) (Math.random() * 399);

if (!snake. contains(random) ) {

dz = random;

break;

}

}

drow(jLabel, dz, Color.YELLOW);

}

}

}

// 每块蛇身的坐标大小

private void drow(JLabel jLabel, int a, Color color) {

jLabel.setOpaque(true);

jLabel.setBackground(color);

jLabel.setSize(18, 18);

jLabel.setLocation(a % 20 * 20, a / 20 * 20);

}

public static void main(String[] args) {

new Work2().init();

}

}