详细解读java的打蜜蜂射击游戏的源代码-课程设计

import java.awt.Dimension; import java.awt.Event; import java.awt.Graphics; import java.awt.Image; import java.awt.Toolkit; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.io.File; import java.io.IOException; import java.util.Random; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JPanel; public class GamePanel extends JPanel implements Runnable, KeyListener { /** 屏幕的宽高* */ private int mScreenWidth = 320; private int mScreenHeight = 480; /** 游戏主菜单状态* */ private static final int STATE_GAME = 0; /** 游戏状态* */ private int mState = STATE_GAME; /** 游戏背景资源 两张图片进行切换让屏幕滚动起来* */ private Image mBitMenuBG0 = null; private Image mBitMenuBG1 = null; /** 记录两张背景图片时时更新的Y坐标* */ private int mBitposY0 = 0; private int mBitposY1 = 0; /** 子弹对象的数量* */ final static int BULLET_POOL_COUNT = 15; /** 飞机移动步长* */ final static int PLAN_STEP = 10; /** 没过500毫秒发射一颗子弹* */ final static int PLAN_TIME = 500; /** 敌人对象的数量* */ final static int ENEMY_POOL_COUNT = 5; /** 敌人飞机偏移量* */ final static int ENEMY_POS_OFF = 65; /** 游戏主线程* */ private Thread mThread = null; /** 线程循环标志* */ private boolean mIsRunning = false; /** 飞机在屏幕中的坐标* */ public int mAirPosX = 0; public int mAirPosY = 0; /** 敌机对象数组* */ Enemy mEnemy[] = null; /** 子弹对象数组* */ Bullet mBuilet[] = null; /** 初始化发射子弹ID* */ public int mSendId = 0; /** 上一颗子弹发射的时间* */ public Long mSendTime = 0L; Image myPlanePic[];/** 玩家飞机所有图片* */ public int myPlaneID = 0; /** 玩家飞机当前帧号* */ /** * 构造方法 */ public GamePanel() { setPreferredSize(new Dimension(mScreenWidth, mScreenHeight)); // 设定焦点在本窗体并付与监听对象 setFocusable(true); addKeyListener(this); init(); setGameState(STATE_GAME); /** 启动游戏主线程* */ mIsRunning = true; mThread = new Thread(this);// 实例线程 mThread.start(); setVisible(true); } protected void Draw() { switch (mState) { case STATE_GAME: renderBg();// 绘制游戏界面（包括背景、敌我飞机、子弹) updateBg(); // 更新游戏 break; } } private void init() { /** 游戏背景* */ try { mBitMenuBG0 = Toolkit.getDefaultToolkit().getImage( "images\\map_0.png"); mBitMenuBG1 = Toolkit.getDefaultToolkit().getImage( "images\\map_1.png"); // Toolkit.getDefaultToolkit().getImage("pic\\t0.jpg"); ImageIO.read(new File("images/map_1.png")); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } /** 创建主角飞机动画对象* */ // mAircraft = new Animation(mContext,new int[]_); /** 第一张图片津贴在屏幕00点，第二张图片在第一张图片上方* */ mBitposY0 = 0; mBitposY1 = -mScreenHeight; /** 初始化飞机的坐标* */ mAirPosX = 150; mAirPosY = 400; myPlanePic = new Image[6]; for (int i = 0; i < 6; i++) myPlanePic[i] = Toolkit.getDefaultToolkit().getImage( "images\\plan_" + i + ".png"); /** 创建敌人对象* */ mEnemy = new Enemy[ENEMY_POOL_COUNT]; for (int i = 0; i < ENEMY_POOL_COUNT; i++) { mEnemy[i] = new Enemy(); mEnemy[i].init(i * ENEMY_POS_OFF, i * ENEMY_POS_OFF-300); } /** 创建子弹类对象* */ mBuilet = new Bullet[BULLET_POOL_COUNT]; for (int i = 0; i < BULLET_POOL_COUNT; i++) { mBuilet[i] = new Bullet(); } mSendTime = System.currentTimeMillis(); } private void setGameState(int newState) { mState = newState; } public void renderBg() { // Graphics g=this.getGraphics(); myPlaneID++; if (myPlaneID == 6) myPlaneID = 0; repaint(); } public void paint(Graphics g) { /** 绘制游戏地图 * */ // ImageIcon icon=new ImageIcon("C://rear.gif"); // Image mBitMenuBG0=icon.getImage(); // g.clearRect(0, 0, mScreenWidth, mScreenHeight); g.drawImage(mBitMenuBG0, 0, mBitposY0, this); g.drawImage(mBitMenuBG1, 0, mBitposY1, this); /** 绘制自己飞机动画* */ g.drawImage(myPlanePic[myPlaneID], mAirPosX, mAirPosY, this); // mAircraft.DrawAnimation(g, mAirPosX, mAirPosY); /** 绘制子弹动画 */ for (int i = 0; i < BULLET_POOL_COUNT; i++) mBuilet[i].DrawBullet(g, this); /** 绘制敌人动画* */ for (int i = 0; i < ENEMY_POOL_COUNT; i++) { mEnemy[i].DrawEnemy(g, this, i ); } } private void updateBg() { /** 更新游戏背景图片实现向下滚动效果 * */ mBitposY0 += 10; mBitposY1 += 10; if (mBitposY0 == mScreenHeight) { mBitposY0 = -mScreenHeight; } if (mBitposY1 == mScreenHeight) { mBitposY1 = -mScreenHeight; } /** 更新子弹动画 * */ for (int i = 0; i < BULLET_POOL_COUNT; i++) { /** 子弹出屏后重新赋值* */ mBuilet[i].UpdateBullet(); } /** 绘制敌人动画* */ for (int i = 0; i < ENEMY_POOL_COUNT; i++) { mEnemy[i].UpdateEnemy(); /** 敌机死亡 或者 敌机超过屏幕还未死亡重置坐标* */ if (mEnemy[i].mAnimState == Enemy.ENEMY_DEATH_STATE && mEnemy[i].mPlayID == 6 || mEnemy[i].m_posY >= mScreenHeight) { mEnemy[i].init(UtilRandom(0, ENEMY_POOL_COUNT) * ENEMY_POS_OFF, 0); } } /** 根据时间初始化为发射的子弹* */ if (mSendId < BULLET_POOL_COUNT) { long now = System.currentTimeMillis(); if (now - mSendTime >= PLAN_TIME) { mBuilet[mSendId].init(mAirPosX-5, mAirPosY-40); mSendTime = now; mSendId++; } } else { mSendId = 0; } // 更新子弹与敌人的碰撞 Collision(); } public void Collision() { // 更新子弹与敌人碰撞 for (int i = 0; i < BULLET_POOL_COUNT; i++) { for (int j = 0; j < ENEMY_POOL_COUNT; j++) { if (mBuilet[i].m_posX >= mEnemy[j].m_posX && mBuilet[i].m_posX <= mEnemy[j].m_posX + 30 && mBuilet[i].m_posY >= mEnemy[j].m_posY && mBuilet[i].m_posY <= mEnemy[j].m_posY + 30 ) { mEnemy[j].mAnimState = Enemy.ENEMY_DEATH_STATE; } } } } /** * 返回一个随机数 * * @param botton * @param top * @return */ private int UtilRandom(int botton, int top) { return ((Math.abs(new Random().nextInt()) % (top - botton)) + botton); } public void run() { while (mIsRunning) { /** 绘制 */ Draw(); // 延时0.1秒 try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } } } // 在这里检测什么键被按下 public void keyPressed(KeyEvent e) { // TODO Auto-generated method stub int key = e.getKeyCode(); System.out.println(key); if (key == KeyEvent.VK_UP)// 假如是向上键被按下 mAirPosY -= PLAN_STEP; if (key == KeyEvent.VK_DOWN)// 假如是向下键被按下 mAirPosY += PLAN_STEP; if (key == KeyEvent.VK_LEFT)// 假如是向左键被按下 { mAirPosX -= PLAN_STEP; if (mAirPosX < 0) mAirPosX = 0; } if (key == KeyEvent.VK_RIGHT)// 假如是向右键被按下 { mAirPosX += PLAN_STEP; if (mAirPosX > mScreenWidth - 30) mAirPosX = mScreenWidth - 30; } System.out.println(mAirPosX + ":" + mAirPosY); } public void keyReleased(KeyEvent arg0) { // TODO Auto-generated method stub } public void keyTyped(KeyEvent arg0) { // TODO Auto-generated method stub } // public static void main(String[] args) { // GamePanel frame = new GamePanel(); // } // public void surfaceDestroyed(SurfaceHolder arg0) { // // surfaceView销毁的时候 // mIsRunning = false; // } }