diff --git a/docs/坦克大战笔记.docx b/docs/坦克大战笔记.docx
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diff --git a/src/com/demo/tank/audio/explode.wav b/src/com/demo/tank/audio/explode.wav
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index 0000000..dc72ab1
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diff --git a/src/com/demo/tank/audio/tank_fire.wav b/src/com/demo/tank/audio/tank_fire.wav
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index 0000000..85279eb
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diff --git a/src/com/demo/tank/audio/tank_move.wav b/src/com/demo/tank/audio/tank_move.wav
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diff --git a/src/com/demo/tank/audio/war1.wav b/src/com/demo/tank/audio/war1.wav
new file mode 100644
index 0000000..099a31e
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diff --git a/src/com/demo/tank/coruse2/Bullet.java b/src/com/demo/tank/coruse2/Bullet.java
index 804d89c..3913f84 100644
--- a/src/com/demo/tank/coruse2/Bullet.java
+++ b/src/com/demo/tank/coruse2/Bullet.java
@@ -42,7 +42,7 @@ public class Bullet {
             default:
                 break;
         }
-        if(x < 0 || y<0 || x> TankFrame.GAME_WIDTH || x > TankFrame.GAME_HEIGHT){
+        if(x < 0 || y<0 || x> TankFrame.GAME_WIDTH || y > TankFrame.GAME_HEIGHT){
             live = false;
         }
     }
diff --git a/src/com/demo/tank/course3/Bullet.java b/src/com/demo/tank/course3/Bullet.java
new file mode 100644
index 0000000..70f708f
--- /dev/null
+++ b/src/com/demo/tank/course3/Bullet.java
@@ -0,0 +1,82 @@
+package com.demo.tank.course3;
+
+import java.awt.*;
+
+public class Bullet {
+    private int x, y;
+    private Direction direction;
+    private static final int SPEED = 5;
+    private static final int WIDTH = 20;
+    private static final int HEIGHT = 20;
+    private boolean live = true;
+    private TankFrameV3 tf;
+
+    public Bullet(int x, int y, Direction direction, TankFrameV3 tf) {
+        this.x = x;
+        this.y = y;
+        this.direction = direction;
+        this.tf = tf;
+    }
+
+    public void paint(Graphics g){
+        if(!live){
+            tf.bullets.remove(this);
+        }
+        Color color = g.getColor();
+        g.setColor(Color.RED);
+        g.fillOval(x, y, WIDTH, HEIGHT);
+        g.setColor(color);
+        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 > TankFrameV3.GAME_WIDTH || y > TankFrameV3.GAME_HEIGHT){
+            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;
+    }
+}
diff --git a/src/com/demo/tank/course3/Direction.java b/src/com/demo/tank/course3/Direction.java
new file mode 100644
index 0000000..54ddc50
--- /dev/null
+++ b/src/com/demo/tank/course3/Direction.java
@@ -0,0 +1,5 @@
+package com.demo.tank.course3;
+
+public enum Direction {
+    LEFT, RIGHT, UP, DOWN;
+}
diff --git a/src/com/demo/tank/course3/MainV3.java b/src/com/demo/tank/course3/MainV3.java
new file mode 100644
index 0000000..d486bf9
--- /dev/null
+++ b/src/com/demo/tank/course3/MainV3.java
@@ -0,0 +1,13 @@
+package com.demo.tank.course3;
+
+import java.io.IOException;
+
+public class MainV3 {
+    public static void main(String[] args) throws InterruptedException, IOException {
+        TankFrameV3 tf = new TankFrameV3();
+        while (true){
+            Thread.sleep(50);
+            tf.repaint();
+        }
+    }
+}
diff --git a/src/com/demo/tank/course3/ResourceManager.java b/src/com/demo/tank/course3/ResourceManager.java
new file mode 100644
index 0000000..db7228d
--- /dev/null
+++ b/src/com/demo/tank/course3/ResourceManager.java
@@ -0,0 +1,20 @@
+package com.demo.tank.course3;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.IOException;
+
+public class ResourceManager {
+    public static BufferedImage tankL, tankR, tankU, tankD;
+
+    static {
+        try {
+            tankL = ImageIO.read(ResourceManager.class.getClassLoader().getResourceAsStream("com/demo/tank/images/tankL.gif"));
+            tankR = ImageIO.read(ResourceManager.class.getClassLoader().getResourceAsStream("com/demo/tank/images/tankR.gif"));
+            tankU = ImageIO.read(ResourceManager.class.getClassLoader().getResourceAsStream("com/demo/tank/images/tankU.gif"));
+            tankD = ImageIO.read(ResourceManager.class.getClassLoader().getResourceAsStream("com/demo/tank/images/tankD.gif"));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/src/com/demo/tank/course3/Tank.java b/src/com/demo/tank/course3/Tank.java
new file mode 100644
index 0000000..6db57e1
--- /dev/null
+++ b/src/com/demo/tank/course3/Tank.java
@@ -0,0 +1,91 @@
+package com.demo.tank.course3;
+
+import java.awt.*;
+
+public class Tank {
+    private int x,y;
+    private Direction dir;
+    private static final int SPEED = 10;
+    private boolean moving;
+    private TankFrameV3 tankFrame;
+
+
+    public Tank(int x, int y, Direction dir, TankFrameV3 tankFrame) {
+        this.x = x;
+        this.y = y;
+        this.dir = dir;
+        this.tankFrame = tankFrame;
+    }
+
+    public void paint(Graphics g) {
+        //根据方向绘制坦克
+        switch (dir){
+            case UP:
+                g.drawImage(ResourceManager.tankU, x, y, null);
+            break;
+            case DOWN:
+                g.drawImage(ResourceManager.tankD, x, y, null);
+                break;
+            case LEFT:
+                g.drawImage(ResourceManager.tankL, x, y, null);
+                break;
+            case RIGHT:
+                g.drawImage(ResourceManager.tankR, 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;
+        }
+    }
+
+    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 void fire() {
+        tankFrame.bullets.add(new Bullet(x, y, this.dir, tankFrame));
+    }
+}
diff --git a/src/com/demo/tank/course3/TankFrameV3.java b/src/com/demo/tank/course3/TankFrameV3.java
new file mode 100644
index 0000000..62573ab
--- /dev/null
+++ b/src/com/demo/tank/course3/TankFrameV3.java
@@ -0,0 +1,135 @@
+package com.demo.tank.course3;
+
+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 TankFrameV3 extends Frame {
+    public static final int GAME_WIDTH = 800;
+    public static final int GAME_HEIGHT = 600;
+    Image image = null;
+
+    Tank tank = new Tank(500, 500, Direction.UP, this);
+//    Bullet bullet = new Bullet(520, 440, Direction.UP);
+    List<Bullet> bullets = new ArrayList();
+
+    public TankFrameV3(){
+        setVisible(true);
+        setBounds(200, 200 , 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){
+        //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.setColor(color);
+
+        tank.paint(g);
+        for (int i = 0; i< bullets.size(); i++){
+            bullets.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);
+//        }
+    }
+
+    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:
+                    tank.fire();
+                    break;
+                default:
+                    break;
+            }
+            setTankDirection();
+        }
+
+        public void setTankDirection(){
+            if(!bL && !bR && !bU && !bD){
+                tank.setMoving(false);
+            }else{
+                tank.setMoving(true);
+                if(bL) tank.setDir(Direction.LEFT);
+                if(bR) tank.setDir(Direction.RIGHT);
+                if(bU) tank.setDir(Direction.UP);
+                if(bD) tank.setDir(Direction.DOWN);
+            }
+        }
+    }
+}
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