diff --git a/src/main/java/org/jcnc/jnotepad/controller/event/handler/tool/SetBtn.java b/src/main/java/org/jcnc/jnotepad/controller/event/handler/tool/SetBtn.java
index 37b7e50..4d36719 100644
--- a/src/main/java/org/jcnc/jnotepad/controller/event/handler/tool/SetBtn.java
+++ b/src/main/java/org/jcnc/jnotepad/controller/event/handler/tool/SetBtn.java
@@ -21,7 +21,7 @@ public class SetBtn implements EventHandler<ActionEvent> {
      */
     @Override
     public void handle(ActionEvent event) {
-        SetStage.getInstance();
+        SetStage.getInstance().openSetStage();
     }
 
 
diff --git a/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java b/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java
index 7c8512e..874998e 100644
--- a/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java
+++ b/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java
@@ -4,100 +4,104 @@ import javafx.scene.Scene;
 import javafx.scene.control.Label;
 import javafx.scene.control.ListView;
 import javafx.scene.control.SplitPane;
-import javafx.scene.control.TitledPane;
 import javafx.scene.layout.StackPane;
+import javafx.scene.control.TitledPane;
 import javafx.scene.layout.VBox;
 import javafx.stage.Stage;
-import org.jcnc.jnotepad.tool.UiUtil;
 
 /**
+ * 设置窗口管理类，实现了单例模式。
+ *
  * @author 许轲
  */
 public class SetStage {
 
+    // 唯一的 SetStage 实例，使用单例模式
     private static final SetStage SET_STAGE = new SetStage();
-    /**
-     * Declare contentDisplay as a class member
-     */
     private StackPane contentDisplay;
 
+    private ListView<String> generalListView;
+    private ListView<String> appearanceListView;
+    private ListView<String> securityListView;
+
+    /**
+     * 获取 SetStage 的唯一实例。
+     *
+     * @return SetStage 的实例
+     */
     public static SetStage getInstance() {
         return SET_STAGE;
     }
 
     private SetStage() {
-        openSetStage(new Stage());
+        // 私有构造方法以实现单例模式
     }
 
-    public void openSetStage(Stage setStage) {
-
+    /**
+     * 打开设置窗口。
+     */
+    public void openSetStage() {
+        // 创建一个用于显示内容的 StackPane，并初始化为默认显示的标签
         contentDisplay = new StackPane(new Label("从左侧选择设置以显示内容"));
 
-        // 创建 TitledPane 组件
-        TitledPane generalPane = new TitledPane("常规设置", createListView("常规设置项1", "常规设置项2"));
-        TitledPane appearancePane = new TitledPane("外观设置", createListView("外观设置项1", "外观设置项2"));
-        TitledPane securityPane = new TitledPane("安全设置", createListView("安全设置项1", "安全设置项2"));
+        // 创建不同设置类别的 ListView，并初始化设置项
+        generalListView = createListView("常规设置项1", "常规设置项2");
+        appearanceListView = createListView("外观设置项1", "外观设置项2");
+        securityListView = createListView("安全设置项1", "安全设置项2");
 
-        generalPane.setOnMouseClicked(event -> {
-            ListView<String> listView = (ListView<String>) generalPane.getContent();
-            if (listView.getSelectionModel().getSelectedItem() != null) {
-                contentDisplay.getChildren().setAll(new Label(listView.getSelectionModel().getSelectedItem() + " 的设置内容"));
-            }
-        });
+        // 创建 TitledPanes，每个面板包含一个标题和对应的设置列表
+        TitledPane generalPane = new TitledPane("常规设置", generalListView);
+        TitledPane appearancePane = new TitledPane("外观设置", appearanceListView);
+        TitledPane securityPane = new TitledPane("安全设置", securityListView);
 
-        appearancePane.setOnMouseClicked(event -> {
-            ListView<String> listView = (ListView<String>) appearancePane.getContent();
-            if (listView.getSelectionModel().getSelectedItem() != null) {
-                contentDisplay.getChildren().setAll(new Label(listView.getSelectionModel().getSelectedItem() + " 的设置内容"));
-            }
-        });
+        // 为 TitledPanes 添加点击事件监听器，用于更新内容显示区域
+        generalPane.setOnMouseClicked(event -> updateContentDisplay(generalListView));
+        appearancePane.setOnMouseClicked(event -> updateContentDisplay(appearanceListView));
+        securityPane.setOnMouseClicked(event -> updateContentDisplay(securityListView));
 
-        securityPane.setOnMouseClicked(event -> {
-            ListView<String> listView = (ListView<String>) securityPane.getContent();
-            if (listView.getSelectionModel().getSelectedItem() != null) {
-                contentDisplay.getChildren().setAll(new Label(listView.getSelectionModel().getSelectedItem() + " 的设置内容"));
-            }
-        });
-
-        // 创建一个 VBox 来容纳 TitledPanes
+        // 创建一个垂直布局容器，将 TitledPanes 放入其中
         VBox titledPaneContainer = new VBox(10);
         titledPaneContainer.getChildren().addAll(generalPane, appearancePane, securityPane);
 
-        // 创建一个占位符，用于显示右侧内容区域
-        StackPane stackPane = new StackPane(new Label("从左侧选择设置以显示内容"));
+        // 创建一个分割面板，左侧是设置列表，右侧是内容显示区域
+        SplitPane splitPane = new SplitPane(titledPaneContainer, contentDisplay);
+        splitPane.setDividerPositions(0.3); // 设置分割位置
 
-        // 设置 TitledPanes 的点击事件监听器
-        generalPane.setOnMouseClicked(event -> stackPane.getChildren().setAll(new Label("常规设置内容")));
-        appearancePane.setOnMouseClicked(event -> stackPane.getChildren().setAll(new Label("外观设置内容")));
-        securityPane.setOnMouseClicked(event -> stackPane.getChildren().setAll(new Label("安全设置内容")));
-
-        // 创建一个水平分割面板来容纳整个布局
-        SplitPane splitPane = new SplitPane(titledPaneContainer, stackPane);
-        // 设置分隔条位置
-        splitPane.setDividerPositions(0.3);
-
-        // 创建场景
+        // 创建设置窗口的场景
         Scene scene = new Scene(splitPane, 800, 600);
 
-        // 设置场景并显示窗口
+        // 创建设置窗口的 Stage，并设置标题和场景
+        Stage setStage = new Stage();
         setStage.setScene(scene);
         setStage.setTitle("设置窗口");
-        setStage.getIcons().add(UiUtil.getIcon());
         setStage.show();
     }
 
+    /**
+     * 创建一个 ListView 并初始化项。
+     *
+     * @param items 要添加到 ListView 的项
+     * @return 初始化后的 ListView
+     */
     private ListView<String> createListView(String... items) {
         ListView<String> listView = new ListView<>();
         listView.getItems().addAll(items);
-
-        listView.setOnMouseClicked(event -> {
-            String selectedItem = listView.getSelectionModel().getSelectedItem();
-            if (selectedItem != null) {
-                contentDisplay.getChildren().setAll(new Label(selectedItem + " 的设置内容"));
-            }
-        });
         return listView;
     }
 
+    /**
+     * 更新内容显示区域，根据选定的列表项显示相应的设置内容。
+     *
+     * @param listView 选定项所属的 ListView
+     */
+    private void updateContentDisplay(ListView<String> listView) {
+        String selectedItem = listView.getSelectionModel().getSelectedItem();
+        if (selectedItem != null) {
+            // 更新内容显示区域为选定项的设置内容标签
+            contentDisplay.getChildren().setAll(new Label(selectedItem + " 的设置内容"));
+        }
+    }
+
+
 
 }