diff --git a/docs/坦克大战笔记.docx b/docs/坦克大战笔记.docx
index 3eaca1e..f6fce0e 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/coruse1/Main.java b/src/com/demo/tank/coruse1/Main.java
index b060e19..16a9162 100644
--- a/src/com/demo/tank/coruse1/Main.java
+++ b/src/com/demo/tank/coruse1/Main.java
@@ -1,7 +1,7 @@
 package com.demo.tank.coruse1;
 
 public class Main {
-    public static void main(String[] args) {
-        new TankFrame();
+    public static void main(String[] args) throws InterruptedException {
+        TankFrame tf = new TankFrame();
     }
 }
diff --git a/src/com/demo/tank/coruse1/TankFrame.java b/src/com/demo/tank/coruse1/TankFrame.java
index ef885bf..a29bcac 100644
--- a/src/com/demo/tank/coruse1/TankFrame.java
+++ b/src/com/demo/tank/coruse1/TankFrame.java
@@ -9,6 +9,11 @@ import java.util.Random;
 
 public class TankFrame extends Frame {
     int x = 200, y = 200;
+    boolean bL = false;
+    boolean bR = false;
+    boolean bU = false;
+    boolean bD = false;
+
     public TankFrame(){
         setVisible(true);
         setSize(800, 600);
@@ -32,8 +37,78 @@ public class TankFrame extends Frame {
 
         @Override
         public void keyPressed(KeyEvent e) {
-            x += 10;
+            int key = e.getKeyCode();
+            switch (key){
+                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;
+            }
+            calculateDirection();
             repaint();
         }
+
+        @Override
+        public void keyReleased(KeyEvent e) {
+            int key = e.getKeyCode();
+            switch (key){
+                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;
+                default:
+                    break;
+            }
+        }
+    }
+
+    public void calculateDirection(){
+        if(bL){
+            x -= 10;
+            calculateVerticalDirection();
+        }else if(bR){
+            x += 10;
+            calculateVerticalDirection();
+        }else if(bU){
+            y -= 10;
+            calculateHorizontalDirection();
+        }else if(bD){
+            y += 10;
+            calculateHorizontalDirection();
+        }
+    }
+
+    public void calculateVerticalDirection(){
+        if(bU){
+            y -= 10;
+        }else if(bD){
+            y += 10;
+        }
+    }
+
+    public void calculateHorizontalDirection(){
+        if(bL){
+            x -= 10;
+        }else if(bR){
+            x += 10;
+        }
     }
 }