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 035b2f8..230c1b6 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
@@ -31,7 +31,7 @@ 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 ca0d4f4..e562997 100644
--- a/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java
+++ b/src/main/java/org/jcnc/jnotepad/ui/setStage/SetStage.java
@@ -12,66 +12,37 @@ import javafx.stage.Stage;
 public class SetStage {
 
     private static final SetStage SET_STAGE = new SetStage();
-    private StackPane contentDisplay; // Declare contentDisplay as a class member
+    private StackPane contentDisplay;
 
     public static SetStage getInstance() {
         return SET_STAGE;
     }
 
     private SetStage() {
-        openSetStage(new Stage());
+        // Private constructor to enforce Singleton pattern
     }
 
-    public void openSetStage(Stage setStage) {
-
+    public void openSetStage() {
         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"));
 
-        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"));
-            }
-        });
+        // 设置 TitledPanes 的点击事件监听器
+        generalPane.setOnMouseClicked(event -> updateContentDisplay((ListView<String>) generalPane.getContent()));
+        appearancePane.setOnMouseClicked(event -> updateContentDisplay((ListView<String>) appearancePane.getContent()));
+        securityPane.setOnMouseClicked(event -> updateContentDisplay((ListView<String>) securityPane.getContent()));
 
-        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"));
-            }
-        });
-
-        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
         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 contentDisplay = new StackPane(new Label("从左侧选择设置以显示内容"));
-
-        // 设置 TitledPanes 的点击事件监听器
-        generalPane.setOnMouseClicked(event -> contentDisplay.getChildren().setAll(new Label("常规设置内容")));
-        appearancePane.setOnMouseClicked(event -> contentDisplay.getChildren().setAll(new Label("外观设置内容")));
-        securityPane.setOnMouseClicked(event -> contentDisplay.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, contentDisplay);
-        splitPane.setDividerPositions(0.3); // 设置分隔条位置
+        splitPane.setDividerPositions(0.3);
 
-        // 创建场景
         Scene scene = new Scene(splitPane, 800, 600);
 
-        // 设置场景并显示窗口
+        Stage setStage = new Stage();
         setStage.setScene(scene);
         setStage.setTitle("设置窗口");
         setStage.show();
@@ -81,16 +52,15 @@ public class SetStage {
         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"));
-            }
-        });
+        listView.setOnMouseClicked(event -> updateContentDisplay(listView));
 
         return listView;
     }
 
-
-
-}
+    private void updateContentDisplay(ListView<String> listView) {
+        String selectedItem = listView.getSelectionModel().getSelectedItem();
+        if (selectedItem != null) {
+            contentDisplay.getChildren().setAll(new Label(selectedItem + " 的设置内容"));
+        }
+    }
+}
\ No newline at end of file