实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.tarena.shoot; import java.awt.Color; import java.awt.Font; import java.awt.Graphics; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.image.BufferedImage; import java.util.Arrays; import java.util.Random; import java.util.Timer; import java.util.TimerTask; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JPanel; public class ShootGame extends JPanel { public static final int WIDTH = 400; // 面板宽 public static final int HEIGHT = 654; // 面板高 /** 游戏的当前状态: START RUNNING PAUSE GAME_OVER */ private int state; public static final int START = 0; public static final int RUNNING = 1; public static final int PAUSE = 2; public static final int GAME_OVER = 3; private int score = 0; // 得分 private Timer timer; // 定时器 private int intervel = 1000/100; // 时间间隔(毫秒) public static BufferedImage background; public static BufferedImage start; public static BufferedImage pause; public static BufferedImage gameover; public static BufferedImage bullet; public static BufferedImage airplane; public static BufferedImage[] airplaneEmber=new BufferedImage[4]; public static BufferedImage bee; public static BufferedImage[] beeEmber=new BufferedImage[4];; public static BufferedImage hero0; public static BufferedImage hero1; public static BufferedImage[] heroEmber=new BufferedImage[4];; public static BufferedImage bigPlane; public static BufferedImage[] bigPlaneEmber=new BufferedImage[4];; private FlyingObject[] flyings = {}; // 敌机数组 private Bullet[] bullets = {}; // 子弹数组 private Hero hero = new Hero(); // 英雄机 private Ember[] embers = {}; // 灰烬 static {// 静态代码块 try { background = ImageIO.read(ShootGame.class .getResource("background.png")); bigPlane = ImageIO .read(ShootGame.class.getResource("bigplane.png")); airplane = ImageIO .read(ShootGame.class.getResource("airplane.png")); bee = ImageIO.read(ShootGame.class.getResource("bee.png")); bullet = ImageIO.read(ShootGame.class.getResource("bullet.png")); hero0 = ImageIO.read(ShootGame.class.getResource("hero0.png")); hero1 = ImageIO.read(ShootGame.class.getResource("hero1.png")); pause = ImageIO.read(ShootGame.class.getResource("pause.png")); gameover = ImageIO .read(ShootGame.class.getResource("gameover.png")); start = ImageIO .read(ShootGame.class.getResource("start.png")); for(int i=0; i<4; i ){ beeEmber[i] = ImageIO.read( ShootGame.class.getResource("bee_ember" i ".png")); airplaneEmber[i] = ImageIO.read( ShootGame.class.getResource("airplane_ember" i ".png")); bigPlaneEmber[i] = ImageIO.read( ShootGame.class.getResource("bigplane_ember" i ".png")); heroEmber[i] = ImageIO.read( ShootGame.class.getResource("hero_ember" i ".png")); } } catch (Exception e) { e.printStackTrace(); } } @Override public void paint(Graphics g) { g.drawImage(background, 0, 0, null); // 画背景图 paintEmber(g); paintHero(g); // 画英雄机 paintBullets(g); // 画子弹 paintFlyingObjects(g); // 画飞行物 paintScore(g); // 画分数 paintState(g); // 画游戏状态 } /** 画英雄机 */ public void paintHero(Graphics g) { g.drawImage(hero.getImage(), hero.getX(), hero.getY(), null); } public void paintEmber(Graphics g) { for (int i = 0; i < embers.length; i ) { Ember e = embers[i]; g.drawImage(e.getImage(), e.getX(), e.getY(), null); } } /** 画子弹 */ public void paintBullets(Graphics g) { for (int i = 0; i < bullets.length; i ) { Bullet b = bullets[i]; if(! b.isBomb()) g.drawImage(b.getImage(), b.getX() - b.getWidth() / 2, b.getY(), null); } } /** 画飞行物 */ public void paintFlyingObjects(Graphics g) { for (int i = 0; i < flyings.length; i ) { FlyingObject f = flyings[i]; g.drawImage(f.getImage(), f.getX(), f.getY(), null); } } /** 画分数 */ public void paintScore(Graphics g) { int x = 10; int y = 25; Font font = new Font(Font.SANS_SERIF,Font.BOLD, 14); g.setColor(new Color(0x3A3B3B)); g.setFont(font); // 设置字体 g.drawString("SCORE:" score, x, y); // 画分数 y =20; g.drawString("LIFE:" hero.getLife(), x, y); } /** 画游戏状态 */ public void paintState(Graphics g) { switch (state) { case START: g.drawImage(start, 0, 0, null); break; case PAUSE: g.drawImage(pause, 0, 0, null); break; case GAME_OVER: g.drawImage(gameover, 0, 0, null); break; } } public static void main(String[] args) { JFrame frame = new JFrame("Shoot Game"); ShootGame game = new ShootGame(); // 面板对象 frame.add(game); // 将面板添加到JFrame中 frame.setSize(WIDTH, HEIGHT); // 大小 frame.setAlwaysOnTop(true); // 其总在最上 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // 默认关闭操作 frame.setIconImage(new ImageIcon("images/icon.jpg").getImage()); // 设置窗体的图标 frame.setLocationRelativeTo(null); // 设置窗体初始位置 frame.setVisible(true); // 尽快调用paint game.action(); // 启动执行 } public void action() { // 启动执行代码 // 鼠标监听事件 MouseAdapter l = new MouseAdapter() { @Override public void mouseMoved(MouseEvent e) { // 鼠标移动 if (state == RUNNING) { // 运行时移动英雄机 int x = e.getX(); int y = e.getY(); hero.moveTo(x, y); } } @Override public void mouseEntered(MouseEvent e) { // 鼠标进入 if (state == PAUSE) { // 暂停时运行 state = RUNNING; } } @Override public void mouseExited(MouseEvent e) { // 鼠标退出 if (state != GAME_OVER) { state = PAUSE; // 游戏未结束,则设置其为暂停 } } @Override public void mouseClicked(MouseEvent e) { // 鼠标点击 switch (state) { case START: state = RUNNING; break; case GAME_OVER: // 游戏结束,清理现场 flyings = new FlyingObject[0]; bullets = new Bullet[0]; hero = new Hero(); score = 0; state = START; break; } } }; this.addMouseListener(l); // 处理鼠标点击操作 this.addMouseMotionListener(l); // 处理鼠标滑动操作 timer = new Timer(); // 主流程控制 timer.schedule(new TimerTask() { @Override public void run() { if (state == RUNNING) { enterAction(); // 飞行物入场 stepAction(); // 走一步 shootAction(); // 射击 bangAction(); // 子弹打飞行物 outOfBoundsAction(); // 删除越界飞行物及子弹 checkGameOverAction(); // 检查游戏结束 emberAction(); } repaint(); // 重绘,调用paint()方法 } }, intervel, intervel); } private void emberAction() { Ember[] live = new Ember[embers.length]; int index = 0; for (int i = 0; i < embers.length; i ) { Ember ember = embers[i]; if(! ember.burnDown()){ live[index ]=ember; } } embers = Arrays.copyOf(live, index); } int flyEnteredIndex = 0; // 飞行物入场计数 /** 飞行物入场 */ public void enterAction() { flyEnteredIndex ; if (flyEnteredIndex % 40 == 0) { // 300毫秒--10*30 FlyingObject obj = nextOne(); // 随机生成一个飞行物 flyings = Arrays.copyOf(flyings, flyings.length 1); flyings[flyings.length - 1] = obj; } } public void stepAction() { /** 飞行物走一步 */ for (int i = 0; i < flyings.length; i ) { // 飞行物走一步 FlyingObject f = flyings[i]; f.step(); } /** 子弹走一步 */ for (int i = 0; i < bullets.length; i ) { Bullet b = bullets[i]; b.step(); } hero.step(); } int shootIndex = 0; // 射击计数 /** 射击 */ public void shootAction() { shootIndex ; if (shootIndex % 30 == 0) { // 100毫秒发一颗 Bullet[] bs = hero.shoot(); // 英雄打出子弹 bullets = Arrays.copyOf(bullets, bullets.length bs.length); // 扩容 System.arraycopy(bs, 0, bullets, bullets.length - bs.length, bs.length); // 追加数组 } } /** 子弹与飞行物碰撞检测 */ public void bangAction() { for (int i = 0; i < bullets.length; i ) { // 遍历所有子弹 Bullet b = bullets[i]; bang(b); } } /** 删除越界飞行物及子弹 */ public void outOfBoundsAction() { int index = 0; FlyingObject[] flyingLives = new FlyingObject[flyings.length]; // 活着的飞行物 for (int i = 0; i < flyings.length; i ) { FlyingObject f = flyings[i]; if (!f.outOfBounds()) { flyingLives[index ] = f; // 不越界的留着 } } flyings = Arrays.copyOf(flyingLives, index); // 将不越界的飞行物都留着 index = 0; // 重置为0 Bullet[] bulletLives = new Bullet[bullets.length]; for (int i = 0; i < bullets.length; i ) { Bullet b = bullets[i]; if (!b.outOfBounds()) { bulletLives[index ] = b; } } bullets = Arrays.copyOf(bulletLives, index); // 将不越界的子弹留着 } /** 检查游戏结束 */ public void checkGameOverAction() { if (isGameOver()) { state = GAME_OVER; // 改变状态 } } /** 检查游戏是否结束 */ public boolean isGameOver() { int index = -1; for (int i = 0; i < flyings.length; i ) { FlyingObject obj = flyings[i]; if (hero.hit(obj)) { // 检查英雄机与飞行物是否碰撞 hero.subtractLife(); hero.setDoubleFire(0); index = i; Ember ember = new Ember(hero); embers = Arrays.copyOf(embers, embers.length 1); embers[embers.length-1]=ember; } } if(index!=-1){ FlyingObject t = flyings[index]; flyings[index] = flyings[flyings.length-1]; flyings[flyings.length-1] = t; flyings = Arrays.copyOf(flyings, flyings.length-1); Ember ember = new Ember(t); embers = Arrays.copyOf(embers, embers.length 1); embers[embers.length-1]=ember; } return hero.getLife() <= 0; } /** 子弹和飞行物之间的碰撞检查 */ public void bang(Bullet bullet) { int index = -1; // 击中的飞行物索引 for (int i = 0; i < flyings.length; i ) { FlyingObject obj = flyings[i]; if (obj.shootBy(bullet)) { // 判断是否击中 index = i; // 记录被击中的飞行物的索引 break; } } if (index != -1) { // 有击中的飞行物 FlyingObject one = flyings[index]; // 记录被击中的飞行物 FlyingObject temp = flyings[index]; // 被击中的飞行物与最后一个飞行物交换 flyings[index] = flyings[flyings.length - 1]; flyings[flyings.length - 1] = temp; flyings = Arrays.copyOf(flyings, flyings.length - 1); // 删除最后一个飞行物(即被击中的) // 检查one的类型 如果是敌人, 就算分 if (one instanceof Enemy) { // 检查类型,是敌人,则加分 Enemy e = (Enemy) one; // 强制类型转换 score = e.getScore(); // 加分 } if (one instanceof Award) { // 若为奖励,设置奖励 Award a = (Award) one; int type = a.getType(); // 获取奖励类型 switch (type) { case Award.DOUBLE_FIRE: hero.addDoubleFire(); // 设置双倍火力 break; case Award.LIFE: hero.addLife(); // 设置加命 break; } } //飞行物变成灰烬 Ember ember = new Ember(one); embers = Arrays.copyOf(embers, embers.length 1); embers[embers.length-1]=ember; } } /** * 随机生成飞行物 * * @return 飞行物对象 */ public static FlyingObject nextOne() { Random random = new Random(); int type = random.nextInt(20); // [0,4) if (type==0) { return new Bee(); }else if(type<=2){ return new BigPlane(); }else{ return new Airplane(); } } }
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