diff --git a/src/com/msb/DirEnum.java b/src/com/msb/DirEnum.java
index a6131de..f9e8c23 100644
--- a/src/com/msb/DirEnum.java
+++ b/src/com/msb/DirEnum.java
@@ -7,5 +7,12 @@ package com.msb;
  * @Version: 1.0
  */
 public enum DirEnum {
-    LEFT, RIGHT, UP, DOWN
+    LEFT, RIGHT, UP, DOWN;
+
+    public static DirEnum valueOf(int ordinal) {
+        if (ordinal < 0 || ordinal >= values().length) {
+            throw new IndexOutOfBoundsException("Invalid ordinal");
+        }
+        return values()[ordinal];
+    }
 }
diff --git a/src/com/msb/Tank.java b/src/com/msb/Tank.java
index 242f6a0..269bffa 100644
--- a/src/com/msb/Tank.java
+++ b/src/com/msb/Tank.java
@@ -38,10 +38,6 @@ public class Tank {
             return;
         }
 
-       /* Color color = g.getColor();
-        g.setColor(Color.YELLOW);
-        g.fillRect(x, y, 50, 50);
-        g.setColor(color);*/
         switch (dir) {
             case UP: g.drawImage(ResourcesMgr.tankU, x, y, null); break;
             case DOWN: g.drawImage(ResourcesMgr.tankD, x, y, null); break;
diff --git a/src/com/msb/TankDemo.java b/src/com/msb/TankDemo.java
index 85f5672..4bbdb11 100644
--- a/src/com/msb/TankDemo.java
+++ b/src/com/msb/TankDemo.java
@@ -1,5 +1,7 @@
 package com.msb;
 
+import java.util.Random;
+
 /**
  * @Author bingor
  * @Date 2022-09-29 11:02
@@ -10,10 +12,11 @@ public class TankDemo {
 
     public static void main(String[] args) throws InterruptedException {
          TankFrame tankFrame = new TankFrame();
+        Random random = new Random();
 
          //创建5个敌方坦克
         for (int i=0; i<5; i++) {
-            tankFrame.tanks.add(new Tank(100 + i*80, 100, DirEnum.DOWN, GroupEnum.BAD, tankFrame));
+            tankFrame.tanks.add(new Tank(100 + i*80, 100, DirEnum.valueOf(random.nextInt(3)), GroupEnum.BAD, tankFrame));
         }
 
          //现实当中，虽然可以过按键来改变方块的坐标并且重新刷新画板来实现移动，但是敌方的坦克应该是自动在跑
diff --git a/src/com/msb/test/CommonTest.java b/src/com/msb/test/CommonTest.java
index 3e1aa76..8906c23 100644
--- a/src/com/msb/test/CommonTest.java
+++ b/src/com/msb/test/CommonTest.java
@@ -1,5 +1,6 @@
 package com.msb.test;
 
+import com.msb.DirEnum;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -7,6 +8,7 @@ import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+import java.util.Random;
 
 /**
  * @Author bingor
@@ -24,4 +26,13 @@ public class CommonTest {
         Assert.assertNotNull(image);
     }
 
+    @Test
+    public void testEnum() {
+        Random random = new Random();
+        System.out.println(DirEnum.valueOf(random.nextInt(3)));
+        System.out.println(DirEnum.valueOf(random.nextInt(3)));
+        System.out.println(DirEnum.valueOf(random.nextInt(3)));
+        System.out.println(DirEnum.valueOf(random.nextInt(3)));
+    }
+
 }