第一个小游戏---贪吃蛇
靠自己写完真的成就感满满,java的乐趣就在这里了
package com.meimei.snake;
import javax.swing.*;
public class GameStart {
public static void main(String[] args) {
//构造窗口
JFrame jf = new JFrame("梅梅的第一个小游戏");
//设置窗口的位置和大小
jf.setBounds(10,10,900,700);
//固定窗口大小,窗口不会再改变
jf.setResizable(false);
//窗口可以关闭
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//添加我们自己写的画布
jf.add(new GamePanel());
//将窗口展示出来
jf.setVisible(true);
}
}
package com.meimei.snake;
import javax.swing.*;
import java.net.URL;
public class Data {
//头部图片
public static URL headerUrl = Data.class.getResource("/static/header.png");
public static ImageIcon header = new ImageIcon(headerUrl);
//头部:上下左右
public static URL upUrl = Data.class.getResource("/static/up.png");
public static URL downUrl = Data.class.getResource("/static/down.png");
public static URL leftUrl = Data.class.getResource("/static/left.png");
public static URL rightUrl = Data.class.getResource("/static/right.png");
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);
//身体
public static URL bodyUrl = Data.class.getResource("/static/body.png");
public static ImageIcon body = new ImageIcon(bodyUrl);
//食物
public static URL foodUrl = Data.class.getResource("/static/food.png");
public static ImageIcon food = new ImageIcon(foodUrl);
}
package com.meimei.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.GregorianCalendar;
import java.util.Random;
/*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 {
//开始定义类了哦,里面的逻辑方法,一步一步来
//第一步 定义蛇的位置,判断游戏是否开始,设置定时器
int lenth;
int [] snakeX= new int[200];
int [] snakeY= new int[300];
String fx = "R" ;//定义蛇的初始方向
boolean isstart = true;
//设置定时器,第一个参数是小蛇爬行的速度
Timer timer = new Timer(900,this);
//第二步 定义食物的位置,并且让食物的位置随机,判断游戏是否结束,定义分数
int foodX;
int foodY;
Random random = new Random();
boolean isfail = false;
int score;
//构造方法 键盘与程序联系,监听键盘
public GamePanel(){
//初始化
init();
//获得焦点事件
this.setFocusable(true);
//获得键盘监听
this.addKeyListener(this);
timer.start();
}
//初始化方法
private void init() {
//初始化蛇的长度,还有给蛇定位
lenth = 3;
snakeX[0]=100;snakeY[0]=100;
snakeX[1]=200;snakeY[1]=200;
snakeX[2]=300;snakeY[2]=300;
//随机的定义食物的位置
foodX = 25+25*random.nextInt(34);
foodY = 75+75*random.nextInt(24);
int score = 0;
}
//画组件
public void paintComponent(Graphics g ){
super.paintComponent(g);//清屏
this.setBackground(Color.pink);//设置面板的背景色
Data.header.paintIcon(this,g, 25,11);//绘制头部位置
//绘制游戏区域
g.fillRect(25,75,850,600);
//把小蛇画上去
if(fx.equals("R")){//蛇的头通过方向变量来判断
Data.right.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if(fx.equals("L")){
Data.left.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if(fx.equals("U")){
Data.up.paintIcon(this,g,snakeX[0],snakeY[0]);
}else if(fx.equals("D")){
Data.down.paintIcon(this,g,snakeX[0],snakeY[0]);
}
for (int i = 1; i < lenth ; i++) {
Data.body.paintIcon(this,g,snakeX[i],snakeY[i]);
}
//画完小蛇画食物
Data.food.paintIcon(this,g,foodX,foodY);
g.setColor(Color.pink);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("长度"+lenth,750,35);
g.drawString("分数"+score,750,50);
//游戏开始提示
if (isstart==false){
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("按下空格键开始游戏",300,300);
}
//失败判断
if(isfail){
g.setColor(Color.white);
g.setFont(new Font("微软雅黑",Font.BOLD,40));
g.drawString("小蛇已死亡,请重新开始游戏",300,300);
}
}
@Override
public void keyTyped(KeyEvent keyEvent) {
}
@Override
//键盘监听事件
public void keyPressed(KeyEvent e) {
//获取按下的键盘
int keycode = e.getKeyCode();
if(keycode==KeyEvent.VK_SPACE){
if(isfail){ //如果游戏失败,从头再来
isfail = false;
init();//重新初始化
}else{
isstart = !isstart;//暂停游戏,重新再来
}
repaint();
}
//键盘控制走向
if(keycode==KeyEvent.VK_LEFT){
fx = "L";
}
if(keycode==KeyEvent.VK_RIGHT){
fx = "R";
}
if(keycode==KeyEvent.VK_UP){
fx = "U";
}
if(keycode==KeyEvent.VK_DOWN){
fx = "D";
}
}
@Override
public void keyReleased(KeyEvent keyEvent) {
}
//定时执行的操作
public void actionPerformed(ActionEvent e){
//如果游戏处于开始状态,并且没有结束,则小蛇可以移动
if (isstart && isfail==false){
//右移:即让后一个移到前一个的位置即可 !
for (int i = lenth-1; i > 0; i--) { //除了脑袋都往前移:身体移动
snakeX[i] = snakeX[i-1]; //即第i节(后一节)的位置变为(i-1:前一节)节的位置!
snakeY[i] = snakeY[i-1];
}
//通过方向控制,头部移动
if (fx.equals("R")){
snakeX[0] = snakeX[0]+25;
if (snakeX[0]>850) snakeX[0] = 25;
}else if (fx.equals("L")){
snakeX[0] = snakeX[0]-25;
if (snakeX[0]<25) snakeX[0] = 850;
}else if (fx.equals("U")){
snakeY[0] = snakeY[0]-25;
if (snakeY[0]<75) snakeY[0] = 650;
}else if (fx.equals("D")){
snakeY[0] = snakeY[0]+25;
if (snakeY[0]>650) snakeY[0] = 75;
}
//吃食物:当蛇的头和食物一样时,算吃到食物!
if (snakeX[0]==foodX && snakeY[0]==foodY){
//1.长度加一
lenth++;
//每吃一个食物,增加积分
score = score + 10;
//2.重新生成食物
foodX = 25 + 25* random.nextInt(34);
foodY = 75 + 25* random.nextInt(24);
}
//结束判断,头和身体撞到了
for (int i = 1; i < lenth; i++) {
//如果头和身体碰撞,那就说明游戏失败
if (snakeX[i]==snakeX[0] && snakeY[i]==snakeY[0] ){
isfail = true;
}
}
repaint(); //需要不断的更新页面实现动画
}
timer.start();//让时间动起来!
}
}