java弹幕小游戏1.0版本

java 弹幕小游戏的最初版本，供大家参考，具体内容如下

最近在学习javaSE，根据b站视频老师的讲解，也参考了他的代码，做了一个弹幕小游戏，也增添了一些自己的代码进去，因为只是最简单的游戏体，以后会慢慢做完整，所以如果有错误，或者代码不够整洁的话，可以帮我改正，谢谢啦。

父类

import java.awt.*;

public class GameObject {
 //游戏物体的父类

 Image img;
 double x,y;
 int speed = 3;
 int width,height;

 public void drawSelf(Graphics g){
 g.drawImage(img,(int)x,(int)y,null);
 }

 public GameObject(Image img, double x, double y, int X_speed,int Y_speed, int width, int height) {
 this.img = img;
 this.x = x;
 this.y = y;
 this.speed = speed;
 this.width = width;
 this.height = height;
 }

 public GameObject(Image img, double x, double y) {
 this.img = img;
 this.x = x;
 this.y = y;
 }

 public GameObject(){ }

 //返回物体所在的矩形，便于后续的碰撞检测
 public Rectangle getRect(){
 return new Rectangle((int)x,(int)y,width,height);
 }
}

弹幕类

import com.sun.xml.internal.ws.model.wsdl.WSDLPortProperties;

import java.awt.*;

public class Shell extends GameObject {
 double degree;
 public Shell() {
 x = 200;
 y = 200;
 width = 10;
 height = 10;
 speed = 2;
 speed = 2;
 //弧度
 degree = Math.random()*Math.PI*2;
 }

 public void draw(Graphics g){
 Color c = g.getColor();
 g.setColor(Color.YELLOW);

 g.fillOval((int)x,(int)y,width,height);

 //炮弹沿着任意角度去飞
 x+=speed*Math.cos(degree);
 y+=speed*Math.sin(degree);

 if(x<0 || x> Constant.GAME_WIDTH-width){
 degree = Math.PI - degree;
 }
 if(y<40 || y> Constant.GAME_HEIGHT-height){
 degree = -degree;
 }

 g.setColor(c);
 }
}

飞机类

import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class Plane extends GameObject{
 boolean left,right,up,down;
 boolean live = true; //飞机是否活着
 boolean leftflag,rightflag,upflag,downflag;//这些布尔值判断当碰到上下左右的边框时的状态
 //如果活着画出来
 public void drawSelf(Graphics g){
 if(live) {
 g.drawImage(img, (int) x, (int) y, null);

 //根据方向进行不同的移动
 if (left) {
 x -= speed;
 }
 if (right) {
 x += speed;
 }
 if (up) {
 y -= speed;
 }
 if (down) {
 y += speed;
 }
 }
 }

 public Plane(Image img,double x,double y) {
 this.img = img;
 this.x = x;
 this.y = y;
 this.speed = 3;
 this.width = img.getWidth(null);
 this.height = img.getHeight(null);
 }

 //按下某个键，增加相应的方向
 public void addDirection(KeyEvent e) {
 switch (e.getKeyCode()) {
 case KeyEvent.VK_LEFT:
 left = true;
 break;
 case KeyEvent.VK_UP:
 up = true;
 break;
 case KeyEvent.VK_RIGHT:
 right = true;
 break;
 case KeyEvent.VK_DOWN:
 down = true;
 break;

 }
 }

 //按下某个键，取消相应的方向
 public void minusDirection(KeyEvent e) {
 switch (e.getKeyCode()) {
 case KeyEvent.VK_LEFT:
 left = false;
 break;
 case KeyEvent.VK_UP:
 up = false;
 break;
 case KeyEvent.VK_RIGHT:
 right = false;
 break;
 case KeyEvent.VK_DOWN:
 down = false;
 break;

 }
 }
}

爆炸类

import java.awt.*;
//爆炸类
public class Explode {
 double x,y; //爆炸的位置
 static Image[] imgs = new Image[16];
 static {
 for(int i=0;i<16;i++){
 imgs[i] = PlayGameframe.GameUtil.getImage("image/explode/e"+(i+1)+".gif");
 imgs[i].getWidth(null);
 }
 }

 int count;

 public void draw(Graphics g){
 if(count <= 15){
 g.drawImage(imgs[count],(int)x,(int)y,null);
 count++;
 }
 }

 public Explode(double x,double y){
 this.x = x;
 this.y = y;
 }
}

常量类

public class Constant {
 public static final int GAME_WIDTH = 500;
 public static final int GAME_HEIGHT = 500;
}

主类

import jdk.internal.cmm.SystemResourcePressureImpl;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import java.awt.Rectangle;
import java.util.Date;


class PlayGameframe extends frame {
 Image planeImg= GameUtil.getImage("image/plane.png");
 Image nightsky = GameUtil.getImage("image/nightsky.jpg");

 //定义飞机的坐标
 Plane plane = new Plane(planeImg,250,250);
 //定义炮弹
 Shell[] shells = new Shell[50];

 Explode boom;

 Date startTime = new Date();
 Date endTime;

 int period;//游戏持续的时间
 
 @Override
 public void paint(Graphics g) { //自动被调用，g这个变量相当于一个画笔
 Color c = g.getColor();
 super.paint(g);//防止黑屏
 g.drawImage(nightsky,0,0,null);
 plane.drawSelf(g);//画飞机

 if(plane.x <= Constant.GAME_WIDTH-plane.width && plane.x >= 30 && plane.y <= Constant.GAME_HEIGHT-30 && plane.y >= 0) plane.speed = 10;
 else plane.speed = -plane.speed;

 //画出所有的炮弹
 for(int i=0;i

因为是初学，还有很多地方都不会，代码也写得不到位，我会慢慢学习并改正。


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