View difference between Paste ID: SCcV3yDc and FYD7CKbk

 import javafx.application.Application;
 import javafx.event.ActionEvent;
 import javafx.event.EventHandler;
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
 import javafx.scene.control.ComboBox;
 import javafx.scene.control.TextField;
 import javafx.scene.layout.VBox;
 import javafx.stage.Stage;
 
 public class test extends Application {
 
     public static void main(String[] args) {
         launch(args);
     }
 
     @Override
     public void start(Stage stage) {
 
         stage.setTitle("Table View Sample");
         stage.setWidth(450);
         stage.setHeight(550);
 
         VBox hbox = new VBox(10);
 
         ComboBox<String> box = new ComboBox<>();
         box.getItems().add("test");
         box.setEditable(true);
         box.getSelectionModel().selectFirst();
 
 
         TextField textfield = new TextField();
 
         Button defaultButton = new Button("press");
         defaultButton.setOnAction(new EventHandler<ActionEvent>() {
             @Override
             public void handle(ActionEvent arg0) {
                 System.out.println("button pressed!");
             }
         });
         defaultButton.setDefaultButton(true);
 
 //        Comment out this line for the second test
-        box.onActionProperty().bind(defaultButton.onActionProperty());
+//        box.onActionProperty().bind(defaultButton.onActionProperty());
 
         hbox.getChildren().addAll(box, textfield,defaultButton);
         Scene scene = new Scene(hbox);
         stage.setScene(scene);
         stage.show();
     }
 
 }