diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index e69de29..94a25f7 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/UML.iml b/UML.iml
index e69de29..c90834f 100644
--- a/UML.iml
+++ b/UML.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="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/Computer.java b/src/Computer.java
index b1da97c..bc163df 100644
--- a/src/Computer.java
+++ b/src/Computer.java
@@ -13,7 +13,7 @@ public class Computer extends JFrame{
     }
 
     public Computer() {
-        this.setTitle("计算器")
+        this.setTitle("计算器");
         Container c = getContentPane();
         c.setLayout(new BorderLayout());
         xs = new JPanel(new FlowLayout());