diff --git a/day01/day01.iml b/day01/day01.iml
new file mode 100644
index 0000000..6db0c46
--- /dev/null
+++ b/day01/day01.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="jdk" jdkName="17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/day01/src/com/inmind/HelloWorld.java b/day01/src/com/inmind/HelloWorld.java
index e583630..298ca53 100644
--- a/day01/src/com/inmind/HelloWorld.java
+++ b/day01/src/com/inmind/HelloWorld.java
@@ -6,5 +6,6 @@ public class HelloWorld {
         System.out.println("你好，java!");
         System.out.println("你好，java!");
         System.out.println("你好，java!");
+        System.out.println("添加了一些代码！！！");
     }
 }