j2me简易赛车游戏

来源：互联网发布：java成员方法编辑：程序博客网时间：2024/04/28 05:12

效果图：

MIDlet代码：

Code:

package com.javaME.MyRacingGames;
import javax.microedition.lcdui.Display;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class HelloRacingGames extends MIDlet {
private Display dis;
public HelloRacingGames() {
// TODO Auto-generated constructor stub
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
}
protected void pauseApp() {
// TODO Auto-generated method stub
}
protected void startApp() throws MIDletStateChangeException {
// TODO Auto-generated method stub
dis = Display.getDisplay(this);
CarRaceCanvas canvas = new CarRaceCanvas();
dis.setCurrent(canvas);
}
}

自定义的GameCanvas代码：

Code:

package com.javaME.MyRacingGames;
import java.util.Random;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.game.GameCanvas;
import javax.microedition.lcdui.game.Sprite;
public class CarRaceCanvas extends GameCanvas implements CommandListener,
Runnable {
private Graphics gra;
// 定义按钮
private Command cmdStart = new Command("开始", Command.SCREEN, 1);
private Command cmdPause = new Command("暂停", Command.SCREEN, 1);
private Sprite myCar;
private Sprite[] enemy = new Sprite[5];
private Thread game;
private boolean loop = true;
private int road;
private Random rnd = new Random();
private int score = 100;
private Font font = null;
public CarRaceCanvas() {
super(true);
this.prepareResource();
this.addCommand(cmdStart);
this.setCommandListener(this);
gra = this.getGraphics();
font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_LARGE);
}
// 初始化资源
public void prepareResource() {
try {
Image myImage = Image.createImage("/myCar.gif");
myCar = new Sprite(myImage);
for (int i = 0; i < enemy.length; i++) {
Image enemyImg = Image.createImage("/enemy.gif");
enemy[i] = new Sprite(enemyImg);
}
} catch (Exception e) {
e.printStackTrace();
}
for (int i = 0; i < enemy.length; i++) {
setEnemy(i);
}
myCar.setPosition((this.getWidth() - myCar.getWidth()) / 2, (this
.getHeight() - myCar.getHeight()) / 2);
}
public void run() {
while (loop) {
drawScreen();
int state = this.getKeyStates();
switch (state) {
case GameCanvas.LEFT_PRESSED:
myCar.move(-10, 0);
judgeMyCar();
break;
case GameCanvas.UP_PRESSED:
myCar.move(0, -10);
judgeMyCar();
break;
case GameCanvas.DOWN_PRESSED:
myCar.move(0, 10);
judgeMyCar();
break;
case GameCanvas.RIGHT_PRESSED:
myCar.move(10, 0);
judgeMyCar();
break;
}
try {
Thread.sleep(50);
} catch (Exception e) {
e.printStackTrace();
}
}
}
// 判断自己的车是否出界
public void judgeMyCar() {
if (myCar.getX() < 0) {
myCar.setPosition(0, myCar.getY());
} else if (myCar.getY() > this.getHeight() - myCar.getHeight()) {
myCar.setPosition(myCar.getX(), this.getHeight()
- myCar.getHeight());
} else if (myCar.getX() > this.getWidth() - myCar.getWidth()) {
myCar.setPosition(this.getWidth() - myCar.getWidth(), myCar.getY());
} else if (myCar.getY() < 0) {
myCar.setPosition(myCar.getX(), 0);
}
}
//设置敌人的位置
public void setEnemy(int en) {
int x, y;
loop: while (true) {
x = rnd.nextInt((int) this.getWidth() - enemy[en].getWidth());
y = -rnd.nextInt(this.getWidth() * 10);
enemy[en].setPosition(x, y);
//防止敌人车辆重叠
for (int j = 0; j < enemy.length; j++) {
if (j != en && enemy[j].collidesWith(enemy[en], true)) {
continue loop;
}
}
break;
}
}
// 按钮事件
public void commandAction(Command cmd, Displayable dis) {
if (cmd == cmdStart) {
loop = true;
game = new Thread(this);
game.start();
this.removeCommand(cmdStart);
this.addCommand(cmdPause);
} else if (cmd == cmdPause) {
loop = false;
game = null;
this.removeCommand(cmdPause);
this.addCommand(cmdStart);
}
}
public void drawScreen() {
gra.setColor(120, 120, 120);
gra.fillRect(0, 0, this.getWidth(), this.getHeight());
drawRoad();
gra.setColor(255, 0, 0);
gra.setFont(font);
for (int i = 0; i < enemy.length; i++) {
enemy[i].move(0, 15);
enemy[i].paint(gra);
if (enemy[i].getY() > this.getHeight()) {
setEnemy(i);
}
check(enemy[i]);
}
gra.drawString("当前分数：" + score, this.getWidth() / 2, 0, Graphics.TOP
| Graphics.HCENTER);
myCar.paint(gra);
this.flushGraphics();
}
public void drawRoad() {
road += 80;
gra.setColor(255, 255, 255);
gra.fillRect((int) this.getWidth() / 2 - 10, road, 20, 150);
if (road >= this.getHeight()) {
road = -150;
}
}
// 用于敌人的车辆相互碰撞的检测
public void checkEnemy(Sprite s) {
for (int i = 0; i < enemy.length; i++) {
if (s != enemy[i]) {
if (s.collidesWith(enemy[i], true)) {
if (s.getX() > enemy[i].getX()) {
s.move(20, 0);
enemy[i].move(-20, 0);
} else {
s.move(-20, 0);
enemy[i].move(20, 0);
}
}
}
}
}
// 用于自己的车辆和敌方的车辆碰撞检测
public void check(Sprite en) {
if (myCar.collidesWith(en, true)) {
score--;
if (myCar.getX() > en.getX()) {
en.move(-20, 0);
myCar.move(20, 0);
checkEnemy(en);
} else {
en.move(20, 0);
myCar.move(-20, 0);
checkEnemy(en);
}
}
if (score == 0) {
loop = false;
game = null;
gra.setColor(120, 120, 120);
gra.fillRect(0, 0, getWidth(), getHeight());
gra.setColor(255, 0, 0);
gra.setFont(font);
gra.drawString("您输了", this.getWidth() / 2, 20, Graphics.TOP
| Graphics.HCENTER);
this.removeCommand(cmdPause);
this.removeCommand(cmdStart);
}
}
}