diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 61a9130..b589d56 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8" />
+    <bytecodeTargetLevel target="17" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 26821fb..3efdf15 100644
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -5,9 +5,10 @@
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
         <option name="delegatedBuild" value="false" />
-        <option name="testRunner" value="PLATFORM" />
+        <option name="testRunner" value="GRADLE" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleJvm" value="1.8" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
@@ -15,8 +16,6 @@
             <option value="$PROJECT_DIR$/cs108library4a" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
-        <option name="useQualifiedModuleNames" value="true" />
       </GradleProjectSettings>
     </option>
   </component>
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 58918f5..403dd45 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="jbr-17" project-jdk-type="JavaSDK" />
 </project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 379ec6d..4a26202 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,9 +2,15 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/CslCs108AndroidJavaApp.iml" filepath="$PROJECT_DIR$/CslCs108AndroidJavaApp.iml" />
-      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/CslCs108AndroidJavaApp.app.iml" filepath="$PROJECT_DIR$/.idea/modules/app/CslCs108AndroidJavaApp.app.iml" />
-      <module fileurl="file://$PROJECT_DIR$/.idea/modules/cs108library4a/CslCs108AndroidJavaApp.cs108library4a.iml" filepath="$PROJECT_DIR$/.idea/modules/cs108library4a/CslCs108AndroidJavaApp.cs108library4a.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/CS108-Android-Java-App.iml" filepath="$PROJECT_DIR$/.idea/modules/CS108-Android-Java-App.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.iml" filepath="$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.androidTest.iml" filepath="$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.androidTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.main.iml" filepath="$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.unitTest.iml" filepath="$PROJECT_DIR$/.idea/modules/app/CS108-Android-Java-App.app.unitTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.iml" filepath="$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.androidTest.iml" filepath="$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.androidTest.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.main.iml" filepath="$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.unitTest.iml" filepath="$PROJECT_DIR$/.idea/modules/cs108library4a/CS108-Android-Java-App.cs108library4a.unitTest.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
deleted file mode 100644
index 7f68460..0000000
--- a/.idea/runConfigurations.xml
+++ /dev/null
@@ -1,12 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="RunConfigurationProducerService">
-    <option name="ignoredProducers">
-      <set>
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
-        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
-      </set>
-    </option>
-  </component>
-</project>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index e77a022..b0fbdd0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -7,7 +7,7 @@ android {
         minSdkVersion 19
         targetSdkVersion 33
         versionCode 38
-        versionName "2.8.22"
+        versionName "2.8.23"
     }
 }
 
diff --git a/cs108library4a/build.gradle b/cs108library4a/build.gradle
index 4fb349d..8d9e6ca 100644
--- a/cs108library4a/build.gradle
+++ b/cs108library4a/build.gradle
@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'maven-publish'
 
 android {
     compileSdkVersion 33
@@ -19,6 +20,39 @@ android {
             minifyEnabled false
         }
     }
+    lintOptions {
+        abortOnError false
+        absolutePaths false
+    }
+}
+
+def getVersionName = { ->
+    return "2.8.23"
+}
+
+def getArtifactId = { ->
+    return "sled_machine"
+}
+
+
+
+task sourceJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier "sources"
+}
+
+afterEvaluate{
+    publishing{
+        publications{
+            release(MavenPublication){
+                from components.release
+                groupId='com.csl.cs108library4a'
+                artifactId = getArtifactId()
+                version = getVersionName()
+                artifact(sourceJar)
+            }
+        }
+    }
 }