[Java] java实现抖音飞机大作战

package zmf.game.shoot;
import java.util.random;
 
/**
 * @author jcf
 * @description: airplane----敌机既是飞行物
 * @date 2018-03-28 11:17:16
 */
public class airplane extends flyingobject implements enemy{
 /** 敌机走步的步数 **/
 private int speed = 2;
 public airplane(){
 image = shootgame.airplane;
 width = image.getwidth();
 height = image.getheight();
 random rand = new random();
 x = rand.nextint(shootgame.width - this.width);
 //y:负的敌机的高
 y = -this.height;
 
 
 }
 
 @override
 public int getscore(){
 return 5;
 }
 
 @override
 public void step(){
 y += speed;
 }
 
 /**
 * 是否越界
 * @return
 */
 @override
 public boolean outofbounds(){
 //敌机的y坐标大于窗口的高
 return this.y > shootgame.height;
  
 }
 
}

package zmf.game.shoot;
import java.awt.image.bufferedimage;
 
/**
 * @author jcf
 * @description: 飞行物主类
 * @date 2018-03-28 11:17:16
 */
public abstract class flyingobject {
 /** 图片命名--java包自有的 **/
 protected bufferedimage image;
 /** 宽 **/
 protected int width;
 /** 高 **/
 protected int height;
 /** x坐标 **/
 protected int x;
 /** y坐标 **/
 protected int y;
 
 /**
 * 飞行物走步
 */
 public abstract void step();
 
 /**
 * 是否越界
 * @return
 */
 public abstract boolean outofbounds();
 
 /**
 * 敌人被子弹撞
 * @param bullet
 * @return
 */
 public boolean shootby(bullet bullet){
 //this:敌人  other：子弹
 int x1 = this.x;
 int x2 = this.x + this.width;
 int y1 = this.y;
 int y2 = this.y + this.height;
 int x = bullet.x;
 int y = bullet.y;
 return x > x1 && x < x2
 &&
 y > y1 && y < y2;
 }
 
}