500行代码做出飞机大战

package day01; 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.swing.JFrame; import javax.swing.JPanel; public class World extends JPanel { Sky sky = new Sky(); Hero hero = new Hero(); Bullet [] b=new Bullet[0]; FlyingObject enemies[] = new FlyingObject[0]; //随机生成敌人对象 public FlyingObject nextOne(){ int r = new Random().nextInt(21); if(r<7){ return new BigAirplane(); }else if(r<14){ return new Airplane(); }else if(r<18){ return new Bee(); }else{ return new Bee1(); } } //敌人入场 int enterCount = 0; public void enterAction(){ //敌人的初始化 enemies = Arrays.copyOf(enemies, enemies.length+1); enemies[enemies.length-1]=nextOne(); } //子弹入场 public void shootAction(){ Bullet b1[] = hero.shoot(); b = Arrays.copyOf(b, b1.length+b.length); System.arraycopy(b1, 0, b, b.length-b1.length, b1.length); } public void stepAction(){ sky.step(); for(int i = 0; i<enemies.length; i++){ enemies[i].step(); } for(int i = 0; i<b.length; i++){ b[i].step(); } } public void outOfBoundsActions(){ int index = 0; FlyingObject[] fos = new FlyingObject[enemies.length]; for(int i=0; i<enemies.length; i++){ FlyingObject fo = enemies[i]; if(!fo.outOfBounds() && !fo.isRemove()){ fos[index] = fo; index++; } } enemies = Arrays.copyOf(fos, index); index = 0; Bullet[] bs = new Bullet[b.length]; for(int i = 0; i<b.length; i++){ Bullet bullet = b[i]; if(!bullet.outOfBounds() && !bullet.isRemove()){ bs[index] = bullet; index++; } } b = Arrays.copyOf(bs, index); } //子弹和敌人发生碰撞 int score = 0; public void bulletHit(){ for(Bullet bullet : b){ for(FlyingObject enemy : enemies){ if(bullet.isLife() && enemy.isLife() && enemy.hit(bullet)){ bullet.goDead();//子弹死 enemy.goDead();//敌人死 //如果敌人是Enemies类型：加分 if(enemy instanceof Enemy){ score += ((Enemy) enemy).setScroe(); } //如果敌人是Award类型： //如果是小蜜蜂：0：调用addLife(); //如果是小蜜蜂：1：调用addDoubleFire(); if(enemy instanceof Award){ if(((Award) enemy).awardType() == 1){ hero.doubleFire += 40; }else{ hero.life += 1; } } } } } } //英雄机碰撞 public void heroHit(){ //敌人死 //英雄命-1 //火力值为0 for(FlyingObject obj : enemies){ if(hero.isLife() && obj.isLife() && obj.hit(hero)){ obj.goDead(); hero.subLIfe(); hero.clearDoubleFire(); } } } //定义常量值 public static final int START = 0; public static final int RUNNING = 1; public static final int PAUSE = 2; public static final int GAMEOVER = 3; //定义变量保存图片 static BufferedImage start; static BufferedImage pause; static BufferedImage gameover; int state = START; static{ start = FlyingObject.getload("start.png"); pause = FlyingObject.getload("pause.png"); gameover = FlyingObject.getload("gameover.png"); } public void stateSwitch(){ } //游戏结束 public void gemeOver(){ if(hero.getLife() <= 0){ state = GAMEOVER; } } public void action(){ MouseAdapter md = new MouseAdapter(){ public void mouseMoved(MouseEvent e){ if(state == RUNNING){ //获取下x，y点坐标 int x = e.getX(); int y = e.getY(); hero.moveTo(x, y); } } public void mouseClicked(MouseEvent e){ switch(state){ case START: state = RUNNING; break; case GAMEOVER: score = 0; hero = new Hero(); sky = new Sky(); enemies = new FlyingObject[0]; b = new Bullet[0]; state = START; break; } } //判断如果是running状态，把state改成暂停状态 public void mouseEntered(MouseEvent e){ if(state == PAUSE){ state = RUNNING; } } public void mouseExited(MouseEvent e){ if(state == RUNNING){ state = PAUSE; } } }; this.addMouseMotionListener(md); this.addMouseListener(md); //定时器 Timer timer = new Timer(); timer.schedule(new TimerTask(){ public void run() { if(state == RUNNING){ //敌人的初始化 enterCount++; if (score == 100){ if(enterCount%1 == 0){ enterAction(); } }else{ if(enterCount%30 == 0){ enterAction(); } } //子弹的初始化 if(enterCount%20 == 0){ shootAction(); } stepAction(); outOfBoundsActions(); bulletHit(); heroHit(); gemeOver(); } repaint();//通知窗口Frame调用paint方法 } }, 10, 10); } public void paint(Graphics g){ sky.paintObject(g); hero.paintObject(g); for(int i = 0; i<b.length; i++){ b[i].paintObject(g); } for(int i = 0; i<enemies.length; i++){ if(enemies[i] != null){ enemies[i].paintObject(g); } } g.drawString("得分" + score, 10, 15); g.drawString("生命" + hero.getLife(), 10, 35); g.drawString("火力" + hero.doubleFire, 10, 55); switch (state){ case START: g.drawImage(start, 0, 0, null); break; case PAUSE: g.drawImage(pause, 0, 0, null); break; case GAMEOVER: g.drawImage(gameover, 0, 0, null); g.drawString("本次得分: " + score, FlyingObject.WIDTH/2-7, FlyingObject.HEIGHT/2-10); break; } } public static void main(String args[]) { //实现窗口 JFrame frame = new JFrame(); World world = new World(); frame.add(world); frame.setTitle("飞机大战"); frame.setSize(FlyingObject.WIDTH, FlyingObject.HEIGHT); //窗口在屏幕中央 frame.setLocationRelativeTo(null); //关闭按钮 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); world.action(); } }