diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000000000000000000000000000000000000..35eb1ddfbbc029bcab630581847471d7f238ec53
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 8e2f1cf5849003dbcf548e198fe97b17ba18a333..576c36e48cce879825a694dcc86d40ebedfde64d 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,7 +1,14 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ChangeListManager">
-    <list default="true" id="e43e9168-5945-4f45-b4c2-1b6410d1eef8" name="Changes" comment="" />
+    <list default="true" id="e43e9168-5945-4f45-b4c2-1b6410d1eef8" name="Changes" comment="">
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/InterpreterMain.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/InterpreterMain.class" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/OrExpression.class" beforeDir="false" afterPath="$PROJECT_DIR$/out/production/patterns/com/chen/InterpreterPattern/po/OrExpression.class" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/out/production/patterns/com/chen/Main.class" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/com/chen/InterpreterPattern/package-info.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/chen/InterpreterPattern/package-info.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/com/chen/PatternMain.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/chen/PatternApplication.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/com/chen/StrategyPattern/StrategyMain.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/com/chen/StrategyPattern/StrategyMain.java" afterDir="false" />
+    </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
@@ -10,12 +17,19 @@
   <component name="FileTemplateManagerImpl">
     <option name="RECENT_TEMPLATES">
       <list>
+        <option value="Interface" />
         <option value="package-info" />
         <option value="Class" />
       </list>
     </option>
   </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
   <component name="ProjectId" id="1zOe73GcNcKVHdZbMKVNmxcnwqc" />
+  <component name="ProjectLevelVcsManager">
+    <ConfirmationsSetting value="1" id="Add" />
+  </component>
   <component name="ProjectView">
     <navigator currentView="ProjectPane" proportions="" version="1" splitterProportion="0.5">
       <flattenPackages />
@@ -83,14 +97,14 @@
   </component>
   <component name="RecentsManager">
     <key name="CopyClassDialog.RECENTS_KEY">
+      <recent name="com.chen.StrategyPattern.po" />
       <recent name="com.company.InterpreterPattern" />
     </key>
   </component>
   <component name="RunManager">
-    <configuration name="Main" type="Application" factoryName="Application" temporary="true">
-      <option name="MAIN_CLASS_NAME" value="com.chen.Main" />
+    <configuration name="PatternApplication" type="Application" factoryName="Application" temporary="true">
+      <option name="MAIN_CLASS_NAME" value="com.chen.PatternApplication" />
       <module name="patterns" />
-      <option name="WORKING_DIRECTORY" value="file://$PROJECT_DIR$" />
       <RunnerSettings RunnerId="Run" />
       <ConfigurationWrapper RunnerId="Run" />
       <method v="2">
@@ -99,7 +113,7 @@
     </configuration>
     <recent_temporary>
       <list>
-        <item itemvalue="Application.Main" />
+        <item itemvalue="Application.PatternApplication" />
       </list>
     </recent_temporary>
   </component>
@@ -116,10 +130,22 @@
       <workItem from="1634085227295" duration="1967000" />
       <workItem from="1634087918450" duration="3646000" />
       <workItem from="1634091679401" duration="1323000" />
+      <workItem from="1634093719115" duration="2395000" />
     </task>
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="3" />
   </component>
+  <component name="Vcs.Log.Tabs.Properties">
+    <option name="TAB_STATES">
+      <map>
+        <entry key="MAIN">
+          <value>
+            <State />
+          </value>
+        </entry>
+      </map>
+    </option>
+  </component>
 </project>
\ No newline at end of file
diff --git a/out/production/patterns/com/chen/PatternApplication.class b/out/production/patterns/com/chen/PatternApplication.class
new file mode 100644
index 0000000000000000000000000000000000000000..4017fb8cce2e1d994aa85ec75a2e4b905f500924
Binary files /dev/null and b/out/production/patterns/com/chen/PatternApplication.class differ
diff --git a/out/production/patterns/com/chen/StrategyPattern/Context.class b/out/production/patterns/com/chen/StrategyPattern/Context.class
new file mode 100644
index 0000000000000000000000000000000000000000..c1e40a1470f1facdde3672a245f179b1a7b95016
Binary files /dev/null and b/out/production/patterns/com/chen/StrategyPattern/Context.class differ
diff --git a/out/production/patterns/com/chen/StrategyPattern/StrategyMain.class b/out/production/patterns/com/chen/StrategyPattern/StrategyMain.class
new file mode 100644
index 0000000000000000000000000000000000000000..4664c59576ba87236f1b9291a514fe1efe4dd1e1
Binary files /dev/null and b/out/production/patterns/com/chen/StrategyPattern/StrategyMain.class differ
diff --git a/out/production/patterns/com/chen/StrategyPattern/po/OperationA.class b/out/production/patterns/com/chen/StrategyPattern/po/OperationA.class
new file mode 100644
index 0000000000000000000000000000000000000000..47d1619ef9b051c52d9ffce19f6c375ea8488179
Binary files /dev/null and b/out/production/patterns/com/chen/StrategyPattern/po/OperationA.class differ
diff --git a/out/production/patterns/com/chen/StrategyPattern/po/OperationB.class b/out/production/patterns/com/chen/StrategyPattern/po/OperationB.class
new file mode 100644
index 0000000000000000000000000000000000000000..72534c4cd897d4b2412ae5776dcc42d96ff4579c
Binary files /dev/null and b/out/production/patterns/com/chen/StrategyPattern/po/OperationB.class differ
diff --git a/out/production/patterns/com/chen/StrategyPattern/po/Strategy.class b/out/production/patterns/com/chen/StrategyPattern/po/Strategy.class
new file mode 100644
index 0000000000000000000000000000000000000000..ed1952cbe2cf10e8ebee626d0f658fde65a4136d
Binary files /dev/null and b/out/production/patterns/com/chen/StrategyPattern/po/Strategy.class differ