diff --git a/src/com/msb/Tank.java b/src/com/msb/Tank.java
index 13c59ea..64835ed 100644
--- a/src/com/msb/Tank.java
+++ b/src/com/msb/Tank.java
@@ -14,11 +14,14 @@ public class Tank {
     private DirEnum dir;
     private static final int SPEED = 10;
     private boolean move = false;
+    //为了解决能够在坦克中发射子弹，将创建的子弹通过坦克发射出来，那么需要在坦克类中持有游戏窗口的引用
+    private TankFrame tankFrame;
 
-    public Tank(int x, int y, DirEnum dir) {
+    public Tank(int x, int y, DirEnum dir, TankFrame tankFrame) {
         this.x = x;
         this.y = y;
         this.dir = dir;
+        this.tankFrame = tankFrame;
     }
 
     public void paint(Graphics g) {
@@ -50,4 +53,8 @@ public class Tank {
     public void setMove(boolean move) {
         this.move = move;
     }
+
+    public void fire() {
+       tankFrame.bullet = new Bullet(this.x, this.y, this.dir);
+    }
 }
diff --git a/src/com/msb/TankFrame.java b/src/com/msb/TankFrame.java
index 45eb69b..9cfc408 100644
--- a/src/com/msb/TankFrame.java
+++ b/src/com/msb/TankFrame.java
@@ -15,7 +15,7 @@ import java.util.Objects;
  */
 public class TankFrame extends Frame {
 
-    Tank tank = new Tank(200, 200, DirEnum.RIGHT);
+    Tank tank = new Tank(200, 200, DirEnum.RIGHT, this);
     Bullet bullet = new Bullet(200, 200, DirEnum.DOWN);
     public static final int GAME_WIDTH = 800;
     public static final int GAME_HEIGHT = 600;
@@ -92,6 +92,7 @@ public class TankFrame extends Frame {
                 case KeyEvent.VK_RIGHT : bR = false; break;
                 case KeyEvent.VK_UP : bU = false; break;
                 case KeyEvent.VK_DOWN : bD = false; break;
+                case KeyEvent.VK_SPACE: tank.fire(); break;
                 default: break;
             }
             setDir();