游戏界面使用JFrame和JPanel构建。背景图通过BG类绘制。英雄机和敌机在界面上显示并移动。子弹从英雄机发射并在屏幕上移动。游戏有四种状态：READY、RUNNING、PAUSE、GAMEOVER。状态通过鼠标点击进行切换：点击开始游戏（从READY变为RUNNING）。点击重新开始游戏（从GAMEOVER变为READY）。鼠标移出窗口时游戏暂停（从RUNNING变为PAUSE）。鼠标移入窗口时游戏继续（从PAUSE变为RUNNING）。开局默认玩家生命值为3，分数为0。每隔一定时间随机生成敌机（小飞机、大飞机、小飞碟）。敌机在屏幕上移动，并与英雄机进行碰撞检测。英雄机可以发射子弹。子弹在屏幕上移动，并与敌机进行碰撞检测。英雄机与敌机发生碰撞时，英雄机会损失一条生命值。子弹与敌机发生碰撞时，敌机会被摧毁，玩家的分增加。当子弹与奖励机发生碰撞时，奖励机会被摧毁，玩家随机获得两张奖励（生命值加1、双倍子弹）。在屏幕左上角显示当前的生命值和得分。生命值减少到0时，游戏进入结束状态。再次点击，重新开始游戏。
1.图片素材（百度网盘分享）
链接：https://pan.baidu.com/s/10QiTcddI_Zxw5jbn8fmOpA?pwd=huan
提取码：huan
2.主页面world.java
package plane.gzeu;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Arrays;
import java.util.Timer;
import java.util.TimerTask;
public class World extends JPanel {
//ImageIcon类：保存图片的路径----->读取图片
// ImageIcon icon = new ImageIcon("images\\background.png");
// BG bg = new BG(0,0,420,700,2);
// Airplane airplane = new Airplane(100,200,300,620,2);
// Bee bee = new Bee(200,100,200,700,2);
BG bg = new BG();
EnemyPlane [] planes;
Hero hero;
int index; //用来控制敌机的数量
Bullet[] bullets; //创建子弹的数组
int life; //英雄机的生命值
int score; //分数
//定义游戏的四种状态：准备，运行，暂停，结束（常量）
public static final int READY = 0;
public static final int RUNNING = 1;
public static final int PAUSE = 2;
public static final int GAMEOVER = 3;
//游戏的初始状态
int state = READY;
// Airplane [] airPlanes = new Airplane[10];
// Bigairplane [] bigAirPlanes = new Bigairplane[10];
// Bee [] bee = new Bee[10];
// Bom [] bom = new Bom[4];
// Bullet [] bullets = new Bullet[3];
// Hero [] hero =new Hero[2];
//初始化方法
public void init(){
bg = new BG();
hero = new Hero();
planes = new EnemyPlane[0]; //默认一个敌机都没有
bullets = new Bullet[0]; //默认一个子弹都没有
index = 0; //默认从0开始
life = 3; //默认3条命
score = 0; //分数为0
}
public World() {
init();
// for(int i=0;i<planes.length;i++){
// if(i%2==0){
// planes[i]=new Airplane();
// }
// else if(i%5==0 && i%2!=0){
// planes[i] = new Bee();
// }
// else {
// planes[i] = new Bigairplane();
// }
// }
// for(int i =0;i<airPlanes.length;i++){
// airPlanes[i] = new Airplane();
// bigAirPlanes[i]=new BigAirPlane();
// bee[i]=new Bee();
// bom[i]=new Bom();
// bullets[i]=new Bullet();
// hero[i]=new Hero();
}
//生成敌机的方法
public void createPlane(){
if(index%16==0){
int n = (int)(Math.random()*10);
EnemyPlane plane;
switch (n){
case 9 :
plane = new Bee(); //10%生成小飞碟
break;
case 8 :
case 7 :
plane = new Bigairplane(); //20%生成大飞机
break;
default:
plane = new Airplane(); //70%生成小飞机
}
//将敌机存入数组中之前，要先对数组进行扩容处理
planes = Arrays.copyOf(planes,planes.length+1);
//将生存的敌机放入数组的最后一个位置
planes[planes.length-1] = plane;
}
}
// for(int i =0;i<bigAirPlanes.length;i++){
// bigAirPlanes[i]=new Bigairplane();
// }
// }
//绘制图片printing
@Override
public void paint(Graphics g) { //paint挂载到当前类，当前类实例化（创建对象）时自动调用
// super.paint(g);
// icon.paintIcon(this,g,0,y1++); //绘制背景，默认第一个绘制
// bg.icon.paintIcon(this,g,(int)bg.x,(int)bg.y);
// bg.move();
// airplane.icon.paintIcon(this,g,(int)airplane.x,(int)airplane.y);
// bee.icon.paintIcon(this,g,(int)bee.x,(int)bee.y);
bg.painting(g);
hero.painting(g);
for(int i=0;i<planes.length;i++){
planes[i].painting(g);
}
for(int i=0;i<bullets.length;i++){
bullets[i].painting(g);
}
g.setColor(new Color(255,255,255));
//设置字体
g.setFont(new Font("微软雅黑",Font.BOLD,20));
g.drawString("生命值"+life,20,20);
g.drawString("分数"+score,20,40);
if(state==READY){
Images.start.paintIcon(this,g,0,0);
}
if(state==PAUSE){
Images.pause.paintIcon(this,g,0,0);
}
if(state==GAMEOVER){
Images.gameover.paintIcon(this,g,0,0);
}
// for(int i =0;i<airPlanes.length;i++){
// airPlanes[i].painting(g);
// bigAirPlanes[i].painting(g);
// bee[i].painting(g);
// bom[i].painting(g);
// bullets[i].painting(g);
// hero[i].painting(g);
// }
// for(int i =0;i<bigAirPlanes.length;i++){
// bigAirPlanes[i].painting(g);
// }
repaint();//刷新窗口
}
public static void main(String[] args) {
//1.显示画框（外层）:JFrame
JFrame jf = new JFrame();
//2.显示面板:Jpanel
World jp =new World();
//3.将面板放入画框中:
jf.add(jp);
//对窗口进行设置
jf.setTitle("我的窗口");//设置标题
jf.setSize(436,700); //设置窗口大小
jf.setLocationRelativeTo(null); //居中显示
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置关闭窗口后自动结束程序
//4.显示窗口
jf.setVisible(true);
jp.action();
}
//唤醒定时器的方法
public void action(){
java.util.Timer timer = new Timer();
MyTesk mt = new MyTesk();
timer.schedule(mt,1000,1000/50);
this.addMouseListener(new MouseAdapter() {
//监听鼠标点击
@Override
public void mouseClicked(MouseEvent e) {
if(state==READY){
state=RUNNING;
}
if(state==GAMEOVER){
state=READY;
init();
}
}
//鼠标移除
@Override
public void mouseExited(MouseEvent e) {
// System.out.println("鼠标移出");
if(state==RUNNING){
state=PAUSE;
}
}
//鼠标移入
@Override
public void mouseEntered(MouseEvent e) {
if(state==PAUSE){
state=RUNNING;
}
}
});
//匿名内部类
MouseAdapter mouseAdapter = new MouseAdapter() {
@Override
public void mouseMoved(MouseEvent e) {
if(state==RUNNING){
int x = e.getX();
int y = e.getY();
hero.move(x,y);
}
}
};
//安装监听器
this.addMouseMotionListener(mouseAdapter);
}
public void createBullet(){
if(!hero.isLiving()){ //英雄机死亡不发射子弹
return;
}
if(index%17==0){
Bullet[] bullets1 = hero.double_fire();
//俩个数组的合并
Bullet[] arr = Arrays.copyOf(bullets,bullets.length+bullets1.length);
System.arraycopy(bullets1,0,arr,bullets.length,bullets1.length);
bullets = arr;
// Bullet bullet =hero.fire(); //英雄机调用fire方法生成子弹
// //将子弹放入数组中
// bullets = Arrays.copyOf(bullets,bullets.length+1); //子弹扩容
// bullets[bullets.length-1] = bullet;
}
}
//加分的方法
public void addScore(FlyingObjesct plane){
if(plane.isDead()){
if(plane instanceof Enemy){
Enemy enemy = (Enemy) plane; //需要做一个强制转化
score += enemy.getScore();
}
if(plane instanceof Aword){
Aword aword = (Aword) plane;
int type =aword.getAword();
if(type == Aword.DOUBLE_FIRE){
hero.getdouble_fire();
}
if(type == Aword.LIFE){
life++;
}
}
}
}
//检测敌机与英雄机的碰撞
public void hero_hit(){
if(hero.isLiving()){
for(int i=0;i<planes.length;i++){
if(!planes[i].isLiving()){
continue;
}
if(hero.bong(planes[i])){
hero.goDead();
planes[i].goDead();
break;
}
}
}
else if(hero.isWait()){ //僵尸状态
if(life>1){
//重新开始
hero = new Hero();
//清屏
for(int i=0;i<planes.length;i++){
planes[i].goDead();
}
life--;
}
else{
life--;
state=GAMEOVER;
}
}
}
//检测每个敌机与子弹的碰撞情况
public void hit(){
for(int i=0;i<bullets.length;i++){
Bullet bullet = bullets[i]; //拿出每一颗子弹
if(!bullet.isLiving()){
continue;
}
for(int j=0;j<planes.length;j++){
FlyingObjesct p = planes[j];
if(!p.isLiving()){
continue;
}
if(p.bong(bullet)){ //被击中
p.attack();
bullet.goDead();
addScore(p);
}
}
}
}
//清理爆炸的飞机
public void clean(){
//清除飞机
EnemyPlane[] living = new EnemyPlane[planes.length];
int index = 0;
for(int i=0;i<planes.length;i++){ //遍历敌机数组
if(planes[i].isWait() || planes[i].outOfBound()){ //如果是等待状态的效果就跳过
continue;
}
living[index++] = planes[i]; //将不是等待状态的敌机存在living里面
}
planes = Arrays.copyOf(living,index);
//清除子弹
Bullet[] livingBullet = new Bullet[bullets.length];
index = 0;
for(int i=0;i<bullets.length;i++){
if(bullets[i].isDead() || bullets[i].outOfBound()){ //如果是已经爆炸的子弹就跳过
continue;
}
livingBullet[index++] = bullets[i];
}
bullets = Arrays.copyOf(livingBullet,index);
}
class MyTesk extends TimerTask {
@Override
public void run() {
index++;
if(state == RUNNING){
createPlane(); //调用生成敌机的方法
createBullet(); //调用生成子弹的方法
hit();//调用子弹击打的效果
clean(); //调用清理敌机方法
hero_hit();
bg.move();
for(int i =0;i<planes.length;i++){
planes[i].move();
}
for(int i =0;i<bullets.length;i++){
bullets[i].move();
}
}
}
}
}
3.小飞机类Airplane.java
package plane.gzeu;
import javax.swing.*;
//飞机类
public class Airplane extends EnemyPlane implements Enemy{ // 实现接口时，要实现接口中的方法
public Airplane(){
this.images = Images.airplane;
w = images[0].getIconWidth();
h = images[0].getIconHeight();
x=(int)(Math.random()*(420-images[0].getIconWidth()));
y=-2*images[0].getIconHeight();
this.step=(Math.random()*2.5+0.7);
this.icon=new ImageIcon("images\\airplane1.png");
// this.icon = Images.airplane[0];
}
public Airplane(double x, double y, double w, double h,double speed) {
// super(x, y, w, h);
this.step=speed;
this.icon=Images.airplane[0];
}
@Override
public int getScore() {
return 10;
}
}
4.大飞机类Bigairplane
package plane.gzeu;
//大飞机类
public class Bigairplane extends EnemyPlane implements Enemy{
public Bigairplane(double x, double y, double w, double h,double step) {
// super(x, y, w, h);
this.step=step;
this.icon = Images.bigairplane[0];
}
public Bigairplane(){
this.images = Images.bigairplane; //初始化数组
w = images[0].getIconWidth();
h = images[0].getIconHeight();
x=(int)(Math.random()*(420-images[0].getIconWidth()));
y=-2*images[0].getIconHeight();
this.step=(Math.random()*3.5+0.7);
// this.icon = Images.bigairplane[0];
life = 4;
}
@Override
public int getScore() {
return 50;
}
}
5.英雄机类Hero.java
package plane.gzeu;
import javax.swing.*;
import static plane.gzeu.Images.bullet;
public class Hero extends EnemyPlane{
public Hero(){
this.images = Images.hero;
x=431/2-images[0].getIconWidth()/2;
y=510;
w=images[0].getIconWidth();
h=images[0].getIconHeight();
// this.speed=0.2;
this.icon = Images.hero[0];
}
public Hero(double x, double y, double w, double h,double step) {
// super(x, y, w, h);
this.step=step;
// this.icon = new ImageIcon("images\\hero1.png"); //设置了Images类直接调用类名就可以引用图片
this.icon = Images.hero[0];
}
@Override
public void move() {}
//接收鼠标的坐标
public void move(int x,int y) {
this.x= x-images[0].getIconWidth()/2;
this.y = y-images[0].getIconHeight()/2;
}
/*
* 子弹的位置（在英雄机上） b.x = h.x-images[0].getIconWidth()/2; b.y=h.y
* 子弹的移动:向上：b.y-=b.step;
* 子弹是无限的：数序扩容
* 射击方法：当英雄机调用一次射击方法时，就发射一个子弹
* */
//射击的方法
public Bullet fire(){
double x = this.x+w/2-4; //获取英雄机的x坐标
Bullet bullet = new Bullet(x,y);//将处理过后的坐标传给子弹
return bullet; //将子弹返回
}
//获取双倍子弹的方法
int doubleTime = 0; // 双倍子弹的时间，20次
public void getdouble_fire(){
doubleTime = 20;
}
//双倍子弹方法
public Bullet[] double_fire(){
if(doubleTime>0){
double x = this.x+w/2-7;
double x1 = this.x+w/2-2; //获取英雄机的x坐标
Bullet bullet1 = new Bullet(x,y);
Bullet bullet2 = new Bullet(x1,y);//将处理过后的坐标传给子弹
Bullet [] bullets = new Bullet[]{bullet1,bullet2};
// return new Bullet[]{bullet1,bullet2};
return bullets;
}
else {
double x = this.x+w/2-4; //获取英雄机的x坐标
Bullet bullet1 = new Bullet(x,y);
return new Bullet[]{bullet1};
}
//
}
//测试
// public static void main(String[] args) {
// Hero hero = new Hero();
// hero.move(200,300);
// Bullet bullet = hero.fire();
// System.out.println(bullet.x+" "+bullet.y);
// }
}
6.敌机类Bee.java
package plane.gzeu;
import javax.swing.*;
public class Bee extends EnemyPlane implements Aword {
double speed1;
public Bee(){
this.images = Images.bee;
w = images[0].getIconWidth();
h = images[0].getIconHeight();
x=(int)(Math.random()*(420-images[0].getIconWidth()));
y=-2*images[0].getIconHeight();
this.step=(Math.random()*4.5+2.5);
this.speed1=(Math.random()*3.5+0.5);
// this.icon=new ImageIcon("images\\bee0.png");
this.icon=Images.bee[0];
life = 6;
}
public Bee(double x, double y, double w, double h,double step) {
// super(x, y, w, h);
this.step=step;
this.icon = Images.bee[0];
}
@Override
public void move() {
y+=speed1;
x+=step;
if(x>431-images[0].getIconWidth()){
step = -step;
}
if(x<=0){
step = -step;
}
}
@Override
public int getAword() {
return Math.random()>0.5?DOUBLE_FIRE:LIFE;
}
}
7.背景类BG.java
package plane.gzeu;
import javax.swing.*;
import java.awt.*;
//背景类(子类)
//继承FlyingObjesct类，得到FlyingObjesct类的方法及属性
public class BG extends FlyingObjesct {
double y0;
public BG(){
x = 0;
y = 0;
icon = Images.bg;
w = icon.getIconWidth();
h = icon.getIconHeight();
y0 = -h;
step = 2;
}
public BG(double x, double y, double w, double h,double step) {
super(x, y, w, h); //重载：调用父类的构造方法，实现方法复用
this.step = step;
this.icon = Images.bg; //背景是固定的
}
public void painting(Graphics g){
icon.paintIcon(null,g,(int)x,(int)y);
icon.paintIcon(null,g,(int)x,(int)y0);
}
@Override
public void move() {
y+=step;
y0+=step;
if(y>=h){
y=-h;
}
if(y0>=h){
y0=-h;
}
}
}
8.爆炸类Bom.java
package plane.gzeu;
import javax.swing.*;
public class Bom extends EnemyPlane{
public Bom(){
x=(int)(Math.random()*370);
y=(int)(Math.random()*370);
this.step = 0.2;
this.icon = Images.bom[0];
}
public Bom(double x, double y, double w, double h, double speed) {//要重写父类的构造方法。新增一个速度
// super(x, y, w, h);//重载：调用父类的构造方法，实现方法复用
this.step=speed;
this.icon=Images.bom[0];
}
}
9.子弹类Bullet.java
package plane.gzeu;
import javax.swing.*;
//继承FlyingObjesct类，得到FlyingObjesct类的方法及属性
public class Bullet extends EnemyPlane {
public Bullet(double x,double y){
this.icon = Images.bullet;
w = icon.getIconWidth();
h = icon.getIconHeight();
this.x = x;
this.y = y;
step = 2;
}
public Bullet(){
x=(int)(Math.random()*370);
y=(int)(Math.random()*370);
this.step = 0.2;
this.icon = Images.bullet;
}
public Bullet(double x, double y, double w, double h, double step) {
// super(x, y, w, h); //重载：调用父类的构造方法，实现方法复用
this.step = step;
this.icon = Images.bullet; //背景是固定的
}
@Override
public void move() {
y-=step;
}
}
10.三种敌机总类EnemyPlane.java
package plane.gzeu;
public abstract class EnemyPlane extends FlyingObjesct {
@Override
public void move() {
y+=step;
}
}
11.飞行物的总类(父类)FlyingObjesct.java
package plane.gzeu;
import javax.swing.*;
import java.awt.*;
//飞行物的总类(父类)
public abstract class FlyingObjesct {
public static final int LIVING = 1; //活着
public static final int DEAD = 0; //死亡
public static final int WAIT = -1; //等待死亡（播放爆炸动画）
//飞机默认是活着的
public int state = LIVING;
//飞机的生命值
public int life = 2;
public double x,y,step,w,h;//step速度
public ImageIcon icon; //图片
// Images images;
public ImageIcon[] images; //数组
public int index = 0;
public ImageIcon [] boms = Images.bom; //存放爆炸效果的图片
//赋初值：构造方法
//快速生成构建方法：快捷键Alt+Insert
public FlyingObjesct(double x, double y, double w, double h) {
this.x = x;
this.y = y;
this.w = w;
this.h = h;
}
//当飞机击打一次，生命值减一，当生命值为0时，进入死亡状态
public boolean attack(){
if(life>0){
life--;
if(life==0){
state = DEAD;
}
return true;
}
return false;
}
//让敌机快速去死
public boolean goDead(){
if(state==LIVING){
life = 0;
state = DEAD;
return true;
}else{
return false;
}
}
//判断飞机的三种状态
public boolean isLiving(){
return state==LIVING; //判断是否活着
}
public boolean isDead(){
return state==DEAD; //判断是否死了
}
public boolean isWait(){
return state==WAIT; //判断是否等待死亡
}
/*实现动画效果
* 1.用数组存储动画效果图片
* 2.初始化数组
* 3.定义一个计数器，作为切换图片的控制条件
* 4.写一个方法，实现切换图片的操作
* */
int i;
public void nextImage(){
switch (state){
case LIVING:
if(images == null) {
return;
}
icon = images[index++/300%images.length]; //0-[数组的长度-1]
break;
case DEAD:
if(boms==null){
return;
}
if(i++/300==boms.length){
state = WAIT;
return;
}
icon = boms[i++/300];
}
}
public FlyingObjesct(){}//无参构造
//移动
public abstract void move();
//绘制图形 方法
public void painting(Graphics g){
nextImage();
icon.paintIcon(null,g,(int)x,(int)y);
}
//检测敌机是否碰到子弹：判断条件中心距c=H/2+h/2
public boolean bong(FlyingObjesct bullet){
FlyingObjesct p =this;
double a = Math.min(p.w,p.h)/2;
double b = Math.min(bullet.w,bullet.h)/2;
double x1=p.x+p.w/2;
double y1=p.y+p.h/2;
double x2=bullet.x+bullet.w/2;
double y2=bullet.y+bullet.h/2;
double c = Math.sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
return c<=a+b;
}
//清除越界的敌机和子弹条件: y<-h-100 || y>700+100
public boolean outOfBound(){
if(y<-h-100){
return true;
}else if(y>700+100){
return true;
}
return false;
}
}
12.图片类Images.java
package plane.gzeu;
import javax.swing.*;
public class Images {
public static ImageIcon bg;
public static ImageIcon bullet;
public static ImageIcon start;
public static ImageIcon pause;
public static ImageIcon gameover;
public static ImageIcon[] hero;
public static ImageIcon[] bigairplane;
public static ImageIcon[] bee;
public static ImageIcon[] airplane;
public static ImageIcon[] bom;
static {
airplane = new ImageIcon[2];
airplane[0] = new ImageIcon("images/airplane0.png");
airplane[1] = new ImageIcon("images/airplane1.png");
bigairplane = new ImageIcon[2];
bigairplane[0] = new ImageIcon("images/bigairplane0.png");
bigairplane[1] = new ImageIcon("images/bigairplane1.png");
bee = new ImageIcon[2];
bee[0] = new ImageIcon("images\\bee0.png");
bee[1] = new ImageIcon("images\\bee1.png");
bom = new ImageIcon[4];
bom[0] = new ImageIcon("images/bom1.png");
bom[1] = new ImageIcon("images/bom2.png");
bom[2] = new ImageIcon("images/bom3.png");
bom[3] = new ImageIcon("images/bom4.png");
bg = new ImageIcon("images\\background.png");
bullet = new ImageIcon("images\\bullet.png");
start = new ImageIcon("images\\start.png");
pause = new ImageIcon("images\\pause.png");
gameover = new ImageIcon("images\\gameover.png");
hero = new ImageIcon[2];
hero[0] = new ImageIcon("images\\hero0.png");
hero[1] = new ImageIcon("images\\hero1.png");
}
//测试图片是否传过来了
public static void main(String[] args) {
System.out.println(start.getImageLoadStatus()); //如果输出8那图片传过来了，输出其他数字有问题
System.out.println(bg.getImageLoadStatus());
System.out.println(bom[0].getImageLoadStatus());
System.out.println(bee[1].getImageLoadStatus());
System.out.println(airplane[1].getImageLoadStatus());
}
}
13.获得奖励的接口Aword.java
package plane.gzeu;
//获得奖励的接口
public interface Aword {
int DOUBLE_FIRE = 1; //第一种奖励，双倍火力
int LIFE = 2; //加生命值
int getAword(); //获得奖励的方法
}
14.获得分数的接口Enemy.java
package plane.gzeu;
//获得分数的接口
public interface Enemy { //加分
// int a = 5;//都是静态常量
// public abstract void add(); //都是抽象方法
public int getScore(); //获得分数的方法
}运行界面：
开始界面
存活界面：
暂停界面
结束界面
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