java 飞机大战

1、分析游戏中的所有图片。他们都有共同的特性。所以建立一个父类，

2、import java.awt.image.BufferedImage;/*** ShootGame锑郎颥坜游戏中所有对象的父类*/public abstract class FlyingObject {public BufferedImage image;public int width;public int height;public int x;public int y;//所有的飞行物都会走路,但是走路的方式各不相同public abstract void step();//检查飞行物是否越界public abstract boolean checkOut();//飞行物被子弹撞/** * 撞上了 返回 true 没撞上 false * 一个飞行物和一个子弹碰撞 */public boolean shootBy(Bullet b) {//获取 子弹的 x,y坐标int bx=b.x;int by=b.y;//获取 x1,x2int x1=this.x-b.width;int x2=this.x+this.width;//获取 y1,y2int y1=this.y-b.height;int y2=this.y+this.height;return bx>x1 && bx<x2 && by>y1 && by<y2;}}

3、public class Airplane extends FlyingObject implements Enemy{int speed;public Airplane() {image=ShootGame.airplane;width=image.getWidth();height=image.getHeight();x=(int) (Math.random()*(ShootGame.WIDTH-width));y=-height;speed=3;}//敌机的走路 是从上往下 则是Y轴增大public void step() {y+=speed;}@Overridepublic boolean checkOut() {return y>ShootGame.HEIGHT;}public int getScore() {return 5;}}

4、package shootgame;/*** 奖励类型接口 * 实现该接口的 死亡 都有奖励*/public interface Award {//定义2个常量用来定义奖励类型int DOUBLE_FIRE=0;//奖励双倍火力值int LIFE=1;//奖励生命int JG=2;//获取奖励类型int getType();}

5、package shootgame;/*** 蜜蜂既是飞行物也是奖励类型*/public class Bee extends FlyingObject implements Award{int xSpeed;int ySpeed;public Bee() {image=ShootGame.bee;width=image.getWidth();height=image.getHeight();x=(int) (Math.random()*(ShootGame.WIDTH-width));y=-height;xSpeed=1;ySpeed=1;}public void step() {if(x<0 || x>ShootGame.WIDTH-this.width) {xSpeed=-xSpeed;}y+=ySpeed;x+=xSpeed;}@Overridepublic boolean checkOut() {return y>ShootGame.HEIGHT;}public int getType() {//生成一个0-1之间的随机整数return (int) (Math.random()*3);}}

6、package shootgame挢旗扦渌;public class Boss extends FlyingObject{int life;int speed;public Boss(){life=130;image=ShootGame.boss1;height=image.getHeight();width=image.getWidth();x=5;y=5;speed=2;}public Boss(int x,int y){life=10;image=ShootGame.boss1;height=image.getHeight();width=image.getWidth();this.x=x;this.y=y;speed=2;}//boss移动public void step() {if(x<0||x>ShootGame.WIDTH-this.width){speed=-speed;}x+=speed;}//发射子弹public BossBullet [] shoot(){BossBullet[] bbs = new BossBullet[1];// 第一发子弹 是 英雄机的x+英雄机1/4宽度bbs[0] = new BossBullet(this.x + this.width / 4, this.y +this.height);return bbs;}//永不越界public boolean checkOut() {return false;}}