diff --git a/docs/坦克大战笔记.docx b/docs/坦克大战笔记.docx
index 87fdd1d..e1d5c20 100644
Binary files a/docs/坦克大战笔记.docx and b/docs/坦克大战笔记.docx differ
diff --git a/src/com/demo/tank/course8/Bullet.java b/src/com/demo/tank/course8/Bullet.java
new file mode 100644
index 0000000..70372ca
--- /dev/null
+++ b/src/com/demo/tank/course8/Bullet.java
@@ -0,0 +1,132 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.ResourceManager;
+
+import java.awt.*;
+
+public class Bullet {
+    private int x, y;
+    private Direction direction;
+    private static final int SPEED = 10;
+    public static final int WIDTH = ResourceManager.bulletD.getWidth();
+    public static final int HEIGHT = ResourceManager.bulletD.getHeight();
+    private boolean live = true;
+    private Group group = Group.BAD;
+    private GameModel gm;
+    Rectangle rect = new Rectangle();
+
+    public Bullet(int x, int y, Direction direction, Group group, GameModel gm) {
+        this.x = x;
+        this.y = y;
+        this.direction = direction;
+        this.group = group;
+        this.gm = gm;
+
+        rect.x = this.x;
+        rect.y = this.y;
+        rect.width = Bullet.WIDTH;
+        rect.height = Bullet.HEIGHT;
+        gm.bullets.add(this);
+    }
+
+    public void paint(Graphics g){
+        if(!live){
+            gm.bullets.remove(this);
+        }
+        switch (direction){
+            case UP:
+                g.drawImage(ResourceManager.bulletU, x, y, null);
+                break;
+            case DOWN:
+                g.drawImage(ResourceManager.bulletD, x, y, null);
+                break;
+            case LEFT:
+                g.drawImage(ResourceManager.bulletL, x, y, null);
+                break;
+            case RIGHT:
+                g.drawImage(ResourceManager.bulletR, x, y, null);
+                break;
+        }
+        move();
+    }
+
+    private void move() {
+        switch (direction){
+            case UP: y -= SPEED;
+                break;
+            case DOWN: y += SPEED;
+                break;
+            case LEFT: x -= SPEED;
+                break;
+            case RIGHT: x += SPEED;
+                break;
+            default:
+                break;
+        }
+        if(x < 0 || y < 0 || x > TankFrameV8.GAME_WIDTH || y > TankFrameV8.GAME_HEIGHT){
+            live = false;
+        }
+        rect.x = this.x;
+        rect.y = this.y;
+    }
+
+    //检测是否跟坦克碰撞
+    public void collideWith(Tank tank){
+        //关闭队友伤害
+        if(this.group == tank.getGroup()) return;
+        if(rect.intersects(tank.rect)){
+            tank.die();
+            this.die();
+            //爆炸
+            int ex = tank.getX() + Tank.WIDTH/2 - Explode.WIDTH/2;
+            int ey = tank.getY() + Tank.HEIGHT/2 - Explode.HEIGHT/2;
+            gm.explodes.add(new Explode(ex, ey , gm));
+        }
+    }
+
+    private void die() {
+        this.live = false;
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public void setX(int x) {
+        this.x = x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    public void setY(int y) {
+        this.y = y;
+    }
+
+    public Direction getDirection() {
+        return direction;
+    }
+
+    public void setDirection(Direction direction) {
+        this.direction = direction;
+    }
+
+    public boolean isLive() {
+        return live;
+    }
+
+    public void setLive(boolean live) {
+        this.live = live;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+    public void setGroup(Group group) {
+        this.group = group;
+    }
+}
diff --git a/src/com/demo/tank/course8/DefaultFireStrategy.java b/src/com/demo/tank/course8/DefaultFireStrategy.java
new file mode 100644
index 0000000..1ed8fab
--- /dev/null
+++ b/src/com/demo/tank/course8/DefaultFireStrategy.java
@@ -0,0 +1,14 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.Audio;
+
+public class DefaultFireStrategy implements FireStrategy {
+    @Override
+    public void fire(Tank tank) {
+        int bx = tank.getX() + Tank.WIDTH/2 - Bullet.WIDTH/2;
+        int by = tank.getY() + Tank.HEIGHT/2 - Bullet.HEIGHT/2;
+        new Bullet(bx, by, tank.getDir(), tank.getGroup(),tank.getGm());
+        if (tank.getGroup() == Group.GOOD) new Thread(() -> new Audio("audio/tank_fire.wav").play()).start();
+    }
+}
diff --git a/src/com/demo/tank/course8/Explode.java b/src/com/demo/tank/course8/Explode.java
new file mode 100644
index 0000000..e662896
--- /dev/null
+++ b/src/com/demo/tank/course8/Explode.java
@@ -0,0 +1,47 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.util.Audio;
+import com.demo.tank.util.ResourceManager;
+
+import java.awt.*;
+
+public class Explode {
+    private int x, y;
+    public static final int WIDTH = ResourceManager.explodes[0].getWidth();
+    public static final int HEIGHT = ResourceManager.explodes[0].getHeight();
+    private GameModel gm;
+
+    private int step = 0;
+
+    public Explode(int x, int y, GameModel gm) {
+        this.x = x;
+        this.y = y;
+        this.gm = gm;
+        new Thread(() -> new Audio("audio/explode.wav").play()).start();
+    }
+
+    public void paint(Graphics g){
+        g.drawImage(ResourceManager.explodes[step++], x, y, null);
+        if(step >= ResourceManager.explodes.length){
+            //播放完爆炸效果图片， remove
+            gm.explodes.remove(this);
+        }
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public void setX(int x) {
+        this.x = x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    public void setY(int y) {
+        this.y = y;
+    }
+
+}
diff --git a/src/com/demo/tank/course8/FireStrategy.java b/src/com/demo/tank/course8/FireStrategy.java
new file mode 100644
index 0000000..cf97e75
--- /dev/null
+++ b/src/com/demo/tank/course8/FireStrategy.java
@@ -0,0 +1,5 @@
+package com.demo.tank.course8;
+
+public interface FireStrategy {
+    void fire(Tank tank);
+}
diff --git a/src/com/demo/tank/course8/FourDirectionFireStrategy.java b/src/com/demo/tank/course8/FourDirectionFireStrategy.java
new file mode 100644
index 0000000..182ece2
--- /dev/null
+++ b/src/com/demo/tank/course8/FourDirectionFireStrategy.java
@@ -0,0 +1,17 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.Audio;
+
+public class FourDirectionFireStrategy implements FireStrategy {
+    @Override
+    public void fire(Tank tank) {
+        int bx = tank.getX() + Tank.WIDTH/2 - Bullet.WIDTH/2;
+        int by = tank.getY() + Tank.HEIGHT/2 - Bullet.HEIGHT/2;
+        for(Direction direction : Direction.values()){
+            new Bullet(bx, by, direction, tank.getGroup(),tank.getGm());
+        }
+        if (tank.getGroup() == Group.GOOD) new Thread(() -> new Audio("audio/tank_fire.wav").play()).start();
+    }
+}
diff --git a/src/com/demo/tank/course8/GameModel.java b/src/com/demo/tank/course8/GameModel.java
new file mode 100644
index 0000000..70b3380
--- /dev/null
+++ b/src/com/demo/tank/course8/GameModel.java
@@ -0,0 +1,66 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.PropertyManager;
+
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.List;
+
+public class GameModel {
+    Tank tank = new Tank(380, 660, Direction.UP, Group.GOOD,this);
+    //    Bullet bullet = new Bullet(520, 440, Direction.UP);
+    List<Bullet> bullets = new ArrayList();
+    List<Tank> enemyTanks = new ArrayList<>();
+
+    List<Explode> explodes = new ArrayList<>();
+
+    public GameModel(){
+        int enemyTankNum = PropertyManager.getInt("enemy.tank.number");
+        for(int i = 0; i < enemyTankNum; i++){
+            enemyTanks.add(new Tank(50 + i*80, 200, Direction.DOWN, Group.BAD, this));
+        }
+    }
+
+    public void paint(Graphics g){
+        //打印出子弹数量
+        Color color = g.getColor();
+        g.setColor(Color.WHITE);
+        g.drawString("当前子弹数量:" + bullets.size(), 60, 50);
+        g.drawString("当前敌人数量:" + enemyTanks.size(), 60, 80);
+        g.drawString("当前爆炸数量:" + explodes.size(), 60, 100);
+        g.setColor(color);
+
+        tank.paint(g);
+
+        for(int i = 0; i< enemyTanks.size(); i++){
+            enemyTanks.get(i).paint(g);
+        }
+
+        for (int i = 0; i< bullets.size(); i++){
+            bullets.get(i).paint(g);
+        }
+
+        //碰撞检测
+        for(int i = 0; i< bullets.size(); i++){
+            for(int j=0; j< enemyTanks.size(); j++){
+                bullets.get(i).collideWith(enemyTanks.get(j));
+            }
+        }
+
+        for (int i = 0; i< explodes.size(); i++){
+            explodes.get(i).paint(g);
+        }
+//        for(Iterator<Bullet> it = bullets.iterator(); it.hasNext();){
+//            Bullet b = it.next();
+//            if(!b.isLive()){
+//                it.remove();
+//            }
+//        }
+//
+//        for (Bullet b : bullets){
+//            b.paint(g);
+//        }
+    }
+}
diff --git a/src/com/demo/tank/course8/MainV8.java b/src/com/demo/tank/course8/MainV8.java
new file mode 100644
index 0000000..e08a2f4
--- /dev/null
+++ b/src/com/demo/tank/course8/MainV8.java
@@ -0,0 +1,20 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.PropertyManager;
+
+import java.io.IOException;
+
+public class MainV8 {
+    public static void main(String[] args) throws InterruptedException, IOException {
+        TankFrameV8 tf = new TankFrameV8();
+
+//        new Thread(() -> new Audio("audio/war1.wav").loop()).start();
+
+        while (true){
+            Thread.sleep(50);
+            tf.repaint();
+        }
+    }
+}
diff --git a/src/com/demo/tank/course8/Tank.java b/src/com/demo/tank/course8/Tank.java
new file mode 100644
index 0000000..30d0533
--- /dev/null
+++ b/src/com/demo/tank/course8/Tank.java
@@ -0,0 +1,185 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+import com.demo.tank.util.ResourceManager;
+
+import java.awt.*;
+import java.util.Random;
+
+public class Tank {
+    private int x,y;
+    private Direction dir;
+    private static final int SPEED = 8;
+    private boolean moving = true;
+    private boolean living = true;
+    private Group group = Group.BAD;
+    GameModel gm = null;
+    public static final int WIDTH = ResourceManager.tankD.getWidth();
+    public static final int HEIGHT = ResourceManager.tankD.getHeight();
+    private Random random = new Random();
+    Rectangle rect = new Rectangle();
+    FireStrategy fireStrategy;
+
+
+    public Tank(int x, int y, Direction dir, Group group, GameModel gm) {
+        this.x = x;
+        this.y = y;
+        this.dir = dir;
+        this.group = group;
+        this.gm = gm;
+
+        rect.x = this.x;
+        rect.y = this.y;
+        rect.width = Tank.WIDTH;
+        rect.height = Tank.HEIGHT;
+
+        if(this.group == Group.GOOD) {
+//            String className = PropertyManager.getString("good.tank.fire.strategy");
+            try {
+                fireStrategy = (FireStrategy) Class.forName("com.demo.tank.course8.FourDirectionFireStrategy").newInstance();
+                System.out.println(fireStrategy);
+            } catch (ClassNotFoundException e) {
+                e.printStackTrace();
+            } catch (InstantiationException e) {
+                e.printStackTrace();
+            } catch (IllegalAccessException e) {
+               e.printStackTrace();
+            }
+        }else if(this.group == Group.BAD) fireStrategy = new DefaultFireStrategy();
+    }
+
+    public void paint(Graphics g) {
+        if(!living) gm.enemyTanks.remove(this);
+        //根据方向绘制坦克
+        switch (dir){
+            case UP:
+                g.drawImage(this.group == Group.GOOD ? ResourceManager.tankU : ResourceManager.badTankU, x, y, null);
+            break;
+            case DOWN:
+                g.drawImage(this.group == Group.GOOD ? ResourceManager.tankD : ResourceManager.badTankD, x, y, null);
+                break;
+            case LEFT:
+                g.drawImage(this.group == Group.GOOD ? ResourceManager.tankL: ResourceManager.badTankL, x, y, null);
+                break;
+            case RIGHT:
+                g.drawImage(this.group == Group.GOOD ? ResourceManager.tankR : ResourceManager.badTankR, x, y, null);
+                break;
+        }
+        move();
+    }
+
+    public void move(){
+        //如果没有移动 return
+        if(!moving) return;
+        switch (dir){
+            case UP: y -= SPEED;
+                break;
+            case DOWN: y += SPEED;
+                break;
+            case LEFT: x -= SPEED;
+                break;
+            case RIGHT: x += SPEED;
+                break;
+            default:
+                break;
+        }
+        if(this.group == Group.BAD) {
+            if(random.nextInt(10) == 5){
+                this.fire();
+            }
+            if(random.nextInt(100) > 95){
+                this.randomDirection();
+            }
+        }
+
+        //边界检测
+        boundsCheck();
+
+        rect.x = this.x;
+        rect.y = this.y;
+    }
+
+    private void boundsCheck() {
+        if(x < 0) x = 0;
+        if(x > TankFrameV8.GAME_WIDTH - Tank.WIDTH) x = TankFrameV8.GAME_WIDTH - Tank.WIDTH;
+        if(y < 30) y = 30; //算上菜单条
+        if(y > TankFrameV8.GAME_HEIGHT - Tank.HEIGHT) y = TankFrameV8.GAME_HEIGHT - Tank.HEIGHT;
+    }
+
+    private void randomDirection() {
+          this.dir = Direction.values()[random.nextInt(4)];
+    }
+
+    public void fire() {
+       fireStrategy.fire(this);
+    }
+
+    public void die(){
+        this.living = false;
+    }
+
+    public int getX() {
+        return x;
+    }
+
+    public void setX(int x) {
+        this.x = x;
+    }
+
+    public int getY() {
+        return y;
+    }
+
+    public void setY(int y) {
+        this.y = y;
+    }
+
+    public Direction getDir() {
+        return dir;
+    }
+
+    public void setDir(Direction dir) {
+        this.dir = dir;
+    }
+
+    public boolean isMoving() {
+        return moving;
+    }
+
+    public void setMoving(boolean moving) {
+        this.moving = moving;
+    }
+
+    public boolean isLiving() {
+        return living;
+    }
+
+    public void setLiving(boolean living) {
+        this.living = living;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+    public void setGroup(Group group) {
+        this.group = group;
+    }
+
+    public Rectangle getRect() {
+        return rect;
+    }
+
+    public void setRect(Rectangle rect) {
+        this.rect = rect;
+    }
+
+    public GameModel getGm() {
+        return gm;
+    }
+
+    public void setGm(GameModel gm) {
+        this.gm = gm;
+    }
+}
diff --git a/src/com/demo/tank/course8/TankFrameV8.java b/src/com/demo/tank/course8/TankFrameV8.java
new file mode 100644
index 0000000..6c0d73a
--- /dev/null
+++ b/src/com/demo/tank/course8/TankFrameV8.java
@@ -0,0 +1,116 @@
+package com.demo.tank.course8;
+
+import com.demo.tank.enums.Direction;
+import com.demo.tank.enums.Group;
+
+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.util.ArrayList;
+import java.util.List;
+
+public class TankFrameV8 extends Frame {
+    GameModel gm = new GameModel();
+    public static final int GAME_WIDTH = 1080;
+    public static final int GAME_HEIGHT = 800;
+    Image image = null;
+
+    public TankFrameV8(){
+        setVisible(true);
+        setBounds(400, 100 , GAME_WIDTH, GAME_HEIGHT);
+        setResizable(false);
+        setTitle("tank war");
+        this.addKeyListener(new MyKeyListener());
+        this.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowClosing(WindowEvent e) {
+                System.exit(0);
+            }
+        });
+    }
+
+    @Override
+    public void update(Graphics g) {
+        if(image == null){
+            image = this.createImage(GAME_WIDTH, GAME_HEIGHT);
+        }
+        Graphics imgGraphic =  image.getGraphics();
+        Color color = g.getColor();
+        imgGraphic.setColor(Color.BLACK);
+        imgGraphic.fillRect(0,0, GAME_WIDTH, GAME_HEIGHT);
+        imgGraphic.setColor(color);
+        paint(imgGraphic);
+        g.drawImage(image, 0, 0, null);
+    }
+
+    @Override
+    public void paint(Graphics g){
+        gm.paint(g);
+    }
+
+    class MyKeyListener extends KeyAdapter{
+        boolean bL = false;
+        boolean bR = false;
+        boolean bU = false;
+        boolean bD = false;
+
+        @Override
+        public void keyPressed(KeyEvent e) {
+            switch (e.getKeyCode()){
+                case KeyEvent.VK_A:
+                    bL = true;
+                    break;
+                case KeyEvent.VK_D:
+                    bR = true;
+                    break;
+                case KeyEvent.VK_W:
+                        bU = true;
+                        break;
+                case KeyEvent.VK_S:
+                    bD = true;
+                    break;
+                default:
+                    break;
+            }
+            setTankDirection();
+        }
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            switch (e.getKeyCode()){
+                case KeyEvent.VK_A:
+                    bL = false;
+                    break;
+                case KeyEvent.VK_D:
+                    bR = false;
+                    break;
+                case KeyEvent.VK_W:
+                    bU = false;
+                    break;
+                case KeyEvent.VK_S:
+                    bD = false;
+                    break;
+                case KeyEvent.VK_SPACE:
+                    gm.tank.fire();
+                    break;
+                default:
+                    break;
+            }
+            setTankDirection();
+        }
+
+        public void setTankDirection(){
+            if(!bL && !bR && !bU && !bD){
+                gm.tank.setMoving(false);
+            }else{
+                gm.tank.setMoving(true);
+                if(bL) gm.tank.setDir(Direction.LEFT);
+                if(bR) gm.tank.setDir(Direction.RIGHT);
+                if(bU) gm.tank.setDir(Direction.UP);
+                if(bD) gm.tank.setDir(Direction.DOWN);
+            }
+        }
+    }
+}