JAVA GUI练习 贪吃蛇小游戏
前几天虽然生病了,但还是跟着狂神学习了GUI的方面,跟着练习了贪吃蛇的小项目,这里有狂神写的源码点我下载,还有我跟着敲的点我下载,嘿嘿,也就注释了下重要的地方,这方面逻辑层面还是很简单的,主要是GUI绘画,布局等等的学习,这里我也贴出我这里GUI练习写过的包点我下载,不过这个比较乱(前面基础的awt比较乱,没分包写,swing基本都分包写了还是不乱的),但你打开这个包,你idea也是能通过英文看出来什么意思的~~
贴一下贪吃蛇的代码吧~~
JavaDoc可以自己idea生成哦,别忘了设置字符编码防止中文乱码错误~~
package com.zaunekko.gui.game.snake;
import javax.swing.*;
//入口
public class StartGame {
public static void main(String[] args) {
JFrame jFrame = new JFrame();
jFrame.setBounds(50,50,915,738);
jFrame.setResizable(false);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
//添加JPanel
jFrame.add(new GamePanel());
jFrame.setVisible(true);
}
}
package com.zaunekko.gui.game.snake;
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 GamePanel extends JPanel implements KeyListener , ActionListener {
//蛇
int length;
int[] snakeX = new int[900];
int[] snakeY = new int[900];
//食物
int foodX;
int foodY;
Random random;
//成绩
int score;
//键盘按键方向
String direction;
//游戏是否开始
boolean isStart;
//是否失败
boolean isFail;
//定时器
//Timer timer; 如果在init()里初始化赋值会有bug,死亡之后会double timer,所以只能初始化一次
Timer timer = new Timer(500,this);//ms为单位
//构造器
public GamePanel(){
init();
//获得焦点和键盘事件
this.setFocusable(true);
this.addKeyListener(this);
timer.start();
}
//初始化
public void init(){
length = 3;
snakeX[0] = 100;
snakeY[0] = 100;
snakeX[1] = 75;
snakeY[1] = 100;
snakeX[2] = 50;
snakeY[2] = 100;
random = new Random();
foodX = 25 + 25*random.nextInt(34);
foodY = 75 + 25*random.nextInt(24);
score = 0;
direction = "R";
isStart = false;
isFail = false;
}
//画笔
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
this.setBackground(Color.WHITE);
Data.header.paintIcon(this,g,25,0);
g.fillRect(25,75,850,600);
Data.food.paintIcon(this,g,foodX,foodY);
switch (direction) {
case "R" -> Data.right.paintIcon(this, g, snakeX[0], snakeY[0]);
case "L" -> Data.left.paintIcon(this, g, snakeX[0], snakeY[0]);
case "U" -> Data.up.paintIcon(this, g, snakeX[0], snakeY[0]);
case "D" -> Data.down.paintIcon(this, g, snakeX[0], snakeY[0]);
}
for (int i = 1; i < length ; ++i){
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
g.setColor(Color.WHITE);
g.setFont(new Font("微软雅黑",Font.BOLD,18));
g.drawString("长度" + length,800,15);
g.drawString("分数" + score,800,45);
if (!isStart && !isFail) {
g.setColor(Color.WHITE);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("按下空格开始游戏",300,300);
}else if(isFail) {
g.setColor(Color.RED);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("失败!按下空格重新开始",300,300);
}
}
@Override
public void keyTyped(KeyEvent e) {
}
//键盘监听
@Override
public void keyPressed(KeyEvent e) {
int keyCode = e.getKeyCode();
if (keyCode == KeyEvent.VK_SPACE) {
if (isFail){
//死亡就初始化
repaint();
init();
}else {
isStart = !isStart;
repaint();
}
}else if (keyCode == KeyEvent.VK_UP){
if (isStart)//如果不加此句判断是否已经开始就可以更改方向,则bug:提示按空格时即可更改初始方向
direction = "U";
}else if (keyCode == KeyEvent.VK_DOWN){
if (isStart)
direction = "D";
}else if (keyCode == KeyEvent.VK_LEFT){
if (isStart)
direction = "L";
}else if (keyCode == KeyEvent.VK_RIGHT){
if (isStart)
direction = "R";
}
}
@Override
public void keyReleased(KeyEvent e) {
}
//事件监听
@Override
public void actionPerformed(ActionEvent e) {
if (isStart && !isFail){
//吃食物
if (snakeX[0] == foodX && snakeY[0] == foodY) {
++length;
foodX = 25 + 25*random.nextInt(34);
foodY = 75 + 25*random.nextInt(24);
score += 10;
}
//蛇的第i个元素为上一个元素的位置
for (int i = length - 1; i > 0 ; --i){
snakeX[i] = snakeX[i-1];
snakeY[i] = snakeY[i-1];
}
//方向以及越界判定
switch (direction) {
case "R" -> {
snakeX[0] += 25;
if (snakeX[0] >= 875) {
snakeX[0] = 25;
}
}
case "L" -> {
snakeX[0] -= 25;
if (snakeX[0] < 25) {
snakeX[0] = 850;
}
}
case "U" -> {
snakeY[0] -= 25;
if (snakeY[0] < 75) {
snakeY[0] = 650;
}
}
case "D" -> {
snakeY[0] += 25;
if (snakeY[0] >= 675) {
snakeY[0] = 75;
}
}
}
//失败
for (int i = 1; i < length; i++) {
if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]){
isFail = true;
break;
}
}
repaint();
}
timer.start();
}
}
package com.zaunekko.gui.game.snake;
import javax.swing.*;
import java.net.URL;
public class Data {
public static URL headerURL = Data.class.getResource("header.png");
public static URL upURL = Data.class.getResource("up.png");
public static URL downURL = Data.class.getResource("down.png");
public static URL leftURL = Data.class.getResource("left.png");
public static URL rightURL = Data.class.getResource("right.png");
public static URL foodURL = Data.class.getResource("food.png");
public static URL bodyURL = Data.class.getResource("body.png");
public static ImageIcon header = new ImageIcon(headerURL);
public static ImageIcon up = new ImageIcon(upURL);
public static ImageIcon down = new ImageIcon(downURL);
public static ImageIcon left = new ImageIcon(leftURL);
public static ImageIcon right = new ImageIcon(rightURL);
public static ImageIcon food = new ImageIcon(foodURL);
public static ImageIcon body = new ImageIcon(bodyURL);
}