boa.rar_j2me

package boat; import javax.microedition.lcdui.*; /** * 游戏界面 */ public class BoatGameCanvas extends Canvas implements Runnable { /**背景图片*/ private Image bgImage; /**军舰图片数组，下标0代表向右，1代表向左*/ private Image boatImage[] = new Image[2]; /**军舰对象*/ Boat boat; /**潜艇对象数组*/ Submarine[] submarine = new Submarine[2]; /**第一组潜艇图片*/ private Image[] sImage1 = new Image[2]; /**第二组潜艇图片*/ private Image[] sImage2 = new Image[2]; /**爆炸图片*/ private Image[] boomImage = new Image[3]; /**炸弹图片*/ private Image bombImage; /**炸弹对象*/ private Bomb bomb; //双缓冲 /**次画面*/ private Image offScreen; /**次画笔*/ private Graphics offG; /**屏幕宽度*/ private int width; /**屏幕高度*/ private int height; /**是否运行*/ private boolean isRunning = true; /**是否连续移动*/ private boolean isRepeated = false; /**军舰移动方向*/ private int boatDirection; /**游戏得分*/ private int score = 0; public BoatGameCanvas() { try { //导入背景图片 bgImage = Image.createImage("/res/bac.png"); //导入军舰图片 boatImage[0] = Image.createImage("/res/ship0.png"); boatImage[1] = Image.createImage("/res/ship1.png"); //导入炸弹图片 bombImage = Image.createImage("/res/boom.png"); //导入潜艇图片 sImage1[0] = Image.createImage("/res/q1.png"); sImage1[1] = Image.createImage("/res/h2.png"); sImage2[0] = Image.createImage("/res/r1.png"); sImage2[1] = Image.createImage("/res/q2.png"); //导入炸弹图片 boomImage[0] = Image.createImage("/res/b.png"); boomImage[1] = Image.createImage("/res/f1.png"); boomImage[2] = Image.createImage("/res/b2.png"); } catch (Exception e) { e.printStackTrace(); } //获得屏幕宽度和高度 width = this.getWidth(); height = this.getHeight(); //创建次画面和次画笔 offScreen = Image.createImage(width, height); offG = offScreen.getGraphics(); //创建军舰对象 boat = new Boat(boatImage, width); //创建潜艇对象 init(0); init(1); //创建炸弹对象 bomb = new Bomb(bombImage, 0, 0, height); //创建线程 Thread t = new Thread(this); //启动线程 t.start(); } private void init(int num) { if (num == 0) { submarine[0] = new Submarine(sImage1, width, height, 0, boomImage); } if (num == 1) { submarine[1] = new Submarine(sImage2, width, height, 1, boomImage); } } /** * 绘制方法 * @param g 系统画笔 */ protected void paint(Graphics g) { //清屏 offG.setColor(0xffffff); offG.fillRect(0, 0, width, height); offG.setColor(0); //绘制背景图片 offG.drawImage(bgImage, 0, 0, Graphics.TOP | Graphics.LEFT); //绘制军舰 boat.paint(offG); //绘制潜艇 submarine[0].paint(offG); submarine[1].paint(offG); //绘制炸弹 if (bomb.isDisplay) { bomb.paint(offG); } //绘制得分 offG.drawString("得分：" + score,4,4,Graphics.TOP | Graphics.LEFT); //将次画面贴到主画面 g.drawImage(offScreen, 0, 0, Graphics.TOP | Graphics.LEFT); } public void keyPressed(int keyCode) { //转换为游戏动作 int action = this.getGameAction(keyCode); switch (action) { case Canvas.LEFT: //向左移动军舰 isRepeated = true; boatDirection = Boat.BOAT_MOVE_LEFT; break; case Canvas.RIGHT: isRepeated = true; boatDirection = Boat.BOAT_MOVE_RIGHT; break; case Canvas.FIRE: //判断是否可以发射 if (!bomb.isDisplay) { bomb.isDisplay = true; //设置坐标 bomb.setX(boat.x + boat.getBoatImageWidth() / 2 - bomb.getImageWidth() / 2); bomb.setY(boat.Y + boat.getBoatImageHeight() - bomb.getImageHeight()); } break; } //重新绘制 repaint(); } public void keyReleased(int keyCode) { //转换为游戏动作 int action = this.getGameAction(keyCode); switch (action) { case Canvas.LEFT: //向左移动军舰 isRepeated = false; break; case Canvas.RIGHT: isRepeated = false; break; } } /** * 运行方法 */ public void run() { while (isRunning) { //暂停 try { Thread.sleep(100); } catch (Exception e) {} //移动军舰 if (isRepeated) { boat.move(boatDirection); } //未爆炸则移动潜艇 if (!submarine[0].isIsBoom()) { submarine[0].move(); } else { //播放爆炸效果 submarine[0].boom(); } if (!submarine[1].isIsBoom()) { submarine[1].move(); } else { //播放爆炸效果 submarine[1].boom(); } //移动炸弹 if (bomb.isDisplay) { bomb.move(); //判别是否碰撞 if (bomb.collidesWith(submarine[0])) { bomb.handlecollidesWith(submarine[0]); //分数增加 score += 10; } if (bomb.collidesWith(submarine[1])) { bomb.handlecollidesWith(submarine[1]); //分数增加 score += 10; } } //垃圾回收 System.gc(); //重绘 repaint(); } } }