diff --git a/pattern-command/src/main/java/org/panda/command/Main.java b/pattern-command/src/main/java/org/panda/command/Main.java
index 3c74e40..4c46a3f 100644
--- a/pattern-command/src/main/java/org/panda/command/Main.java
+++ b/pattern-command/src/main/java/org/panda/command/Main.java
@@ -9,11 +9,17 @@ import java.awt.event.*;
  * @author qi
  */
 public class Main extends JFrame implements ActionListener, MouseMotionListener, WindowListener {
-    //绘制的历史记录
+    /**
+     * 绘制的历史记录
+     */
     private MacroCommand history = new MacroCommand();
-    //绘制区域
+    /**
+     * 绘制区域
+     */
     private DrawCanvas canvas = new DrawCanvas(400,400,history);
-    //删除按钮
+    /**
+     * 删除按钮
+     */
     private JButton clearButton = new JButton("clear");
 
     public Main(String title) throws HeadlessException {