坦克大战Java applet版

package YrstTank5; import java.applet.*; import java.awt.MediaTracker; import java.applet.Applet; import java.awt.Graphics; import java.awt.Image; import java.util.Random; public class YrstTank extends Applet { int myTankWidth, myTankHeight; int enemyTankWidth, enemyTankHeight; int myTankX, myTankY; int enemyTankX, enemyTankY; Image myTankImg[]; Image enemyTankImg[]; // int destroyEnemyNum=0; Image myTankSrcImg; Image enemyTankSrcImg; MediaTracker MT; PlayerTankSprite myTankSprite; EnemyTankSprite[] enemyTank; ShellSprite Myshell; Image bufferImage; Image shellSrcImg; Graphics bufferGraphic; //缓冲画面图形对象 Image backing; TankThread tankthread; //ShellSprite myshell; ShellSprite[] enemyShell; public Image shellImg[]; Explosion explosion; Image explosionImg[]; //爆炸效果图片分割后的存储数组 Image explosionSrcImg; //爆炸效果原始图片 private AudioClip explAudio, bkMusicAudio, gameOverAudio; Random rand; final int enemynum = 2; private int killEnemyNum = 0; private int leftEnemyNum = 9; private int LifeBlood = 1000; private int GameScores = 0; private boolean isGameOver = false; private DrawMap drawGameMap; private Image TileSrcImg; public static final int TILE_WIDTH = 32; public static final int TILE_HEIGHT = 32; public static final int TILE_ROWS = 1; public static final int TILE_COLS = 3; public static final int MAP_ROWS = 15; public static final int MAP_COLS = 20; public void init() { MT = new MediaTracker(this); myTankImg = new Image[4]; enemyTankImg = new Image[4]; shellImg = new Image[2]; bkMusicAudio = getAudioClip(getDocumentBase(), "audio/Music.mid"); explAudio = getAudioClip(getDocumentBase(), "audio/Explosion.wav"); gameOverAudio = getAudioClip(getDocumentBase(), "audio/GameOver.wav"); explosionSrcImg = getImage(getDocumentBase(), "pic/explosion.gif"); // backing = getImage(getDocumentBase(),"pic/Bckscrn.png"); myTankSrcImg = getImage(getDocumentBase(), "pic/Tank.png"); enemyTankSrcImg = getImage(getDocumentBase(), "pic/ETank.png"); shellSrcImg = getImage(getDocumentBase(), "pic/Shell.png"); TileSrcImg = getImage(getDocumentBase(), "pic/Walls.png"); MT.addImage(explosionSrcImg, 0); MT.addImage(myTankSrcImg, 0); MT.addImage(enemyTankSrcImg, 0); MT.addImage(shellSrcImg, 0); MT.addImage(TileSrcImg, 0); try { MT.waitForAll(); } catch (InterruptedException E) {} explosionImg = GetClipImage.getImages(explosionSrcImg, 8, 34, 33); myTankImg = GetClipImage.getImages(myTankSrcImg, 4, 45, 45); enemyTankImg = GetClipImage.getImages(enemyTankSrcImg, 4, 45, 45); shellImg = GetClipImage.getImages(shellSrcImg, 2, 10, 10); myTankWidth = myTankSrcImg.getWidth(this) / 4; myTankHeight = myTankSrcImg.getHeight(this); enemyTankWidth = enemyTankSrcImg.getWidth(this) / 4; enemyTankHeight = enemyTankSrcImg.getHeight(this); myTankX = TILE_WIDTH * 7; myTankY = this.getHeight() - myTankHeight - 1; bufferImage = this.createImage(this.getWidth(), this.getHeight()); bufferGraphic = bufferImage.getGraphics(); this.setFocusable(true); this.resize(this.getWidth(), this.getHeight()); rand = new Random(); //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ //Myshell构造时需要explosion类对象为参数，可是此时explosion还未被构造出来 //因此explosion=null //解决办法：将explosion的构造放在Myshell构造前即可 explosion = new Explosion(explosionImg, this); Myshell = new ShellSprite(shellImg[0], 0, 20, explosion, this); Myshell.setSize(shellSrcImg.getWidth(this) / 2, shellSrcImg.getHeight(this) / 2); //explosion = new Explosion(explosionImg, this);//本句有问题，必须在Myshell构造前 //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ myTankSprite = new PlayerTankSprite(myTankImg, myTankX, myTankY, Myshell, this); myTankSprite.setSize(myTankWidth, myTankHeight); myTankSprite.setPos(myTankX, myTankY); enemyTank = new EnemyTankSprite[enemynum]; enemyShell = new ShellSprite[enemynum]; creatNewEnemyTank(); drawGameMap = new DrawMap(this, TileSrcImg, TILE_WIDTH, TILE_HEIGHT, TILE_ROWS, TILE_COLS, MAP_ROWS, MAP_COLS); } public void creatNewEnemyTank() { for (int i = 0; i < enemynum; i++) { int a = i; if (a >= 3) a = 0; switch (a) { case 0: //左上角 enemyTankX = 1; enemyTankY = 1; break; case 1: //右上角 enemyTankX = this.getWidth() - DrawGameState.StatusBarWidth - enemyTankWidth - 1; enemyTankY = 1; break; case 2: //中间位置 enemyTankX = (this.getWidth() - enemyTankWidth) / 2; enemyTankY = 1; } //enemyTankX=rand.nextInt(10000)%(this.getWidth()-enemyTankWidth); // enemyTankY=rand.nextInt(10000)%(this.getHeight()-enemyTankHeight); enemyShell[i] = new ShellSprite(shellImg[1], 0, 4, explosion, this); enemyShell[i].setSize(shellSrcImg.getWidth(this) / 2, shellSrcImg.getHeight(this) / 2); enemyShell[i].setVisible(true); enemyShell[i].setMove(true); enemyTank[i] = new EnemyTankSprite(enemyTankImg, enemyTankX, enemyTankY, enemyShell[i], this); enemyTank[i].setTankDirection(rand.nextInt(12) % 4); enemyTank[i].setSize(enemyTankWidth, enemyTankHeight); enemyTank[i].setVisible(true); enemyTank[i].setMove(true); } } public void recreatNewEnemyTank() { if (killEnemyNum == enemynum) { killEnemyNum = 0; creatNewEnemyTank(); } } //tankthread=new TankThread(this,myTankSprite,enemyTank); public void start() { tankthread = new TankThread(this, myTankSprite, enemyTank, Myshell, enemyShell, explosion); tankthread.start(); } public void stop() { tankthread = null; } public void paint(Graphics g) { if (isGameOver == false) { //bufferGraphic.clearRect(0, 0, this.getWidth(), this.getHeight()); // bufferGraphic.drawImage(backing,0,0,this); drawGameMap.PaintMaps(bufferGraphic); recreatNewEnemyTank(); for (int i = 0; i < enemynum; i++) { if (enemyTank[i].visible == true) { enemyTank[i].drawSprite(bufferGraphic, enemyTank[i].getTankDirection()); enemyShell[i].drawSprite(bufferGraphic); //间隔一定时间后抽取坦克方向 int k = rand.nextInt(10000); int d = rand.nextInt(12) % 4; if (k % 2 != 0 && k < 30) { enemyTank[i].setTankDirection(d); } if (myTankSprite.isCollided(enemyTank[i])) { setExplosionPosition(enemyTank[i]); explosion.setVisible(true); //explosion.setActive(false); enemyTank[i].setMove(false); enemyTank[i].setVisible(false); killEnemyNum = killEnemyNum + 1; } if (Myshell.isCollided(enemyTank[i])) { setExplosionPosition(enemyTank[i]); explosion.setVisible(true); //explosion.setActive(false); enemyTank[i].setMove(false); enemyTank[i].setVisible(false); killEnemyNum = killEnemyNum + 1; Myshell.setVisible(false); Myshell.setMove(false); leftEnemyNum = leftEnemyNum - 1; GameScores = GameScores + 100; } if (enemyShell[i].isCollided(myTankSprite)) { setExplosionPosition(myTankSprite); explosion.setVisible(true); //myTankSprite.setVisible(false); LifeBlood = LifeBlood - 5; } } } myTankSpri