The answer to your question Can JavaFx scenebuilder used to create Java Code instead of FXML is You Can't
If you need to use Java to create your Presentation Layer, you will have to do it by writing codes on your own and there are reasons to it. Please follow the post below :
JavaFX empowers you to create UI using both Java code and XML-based language called FXML
. Scene Builder was introduced to leverage the use of FXML, by providing a DRAG n DROP
feature, to generate FXML code. You can consider this similar to Window Builder for Swing, with a difference of the end result being in FXML(.fxml) instead of Java(.java).
Basic Difference b/w Java code and FXML
Java Code
BorderPane border = new BorderPane();
Label toppanetext = new Label("Page Title");
border.setTop(toppanetext);
Label centerpanetext = new Label ("Some data here");
border.setCenter(centerpanetext);
FXML
<BorderPane>
<top>
<Label text="Page Title"/>
</top>
<center>
<Label text="Some data here"/>
</center>
</BorderPane>
Why Use FXML, When I can achive the same via JAVA code
You would be thinking as to why to use FXML, when we can make the same using JAVA
. Well, its your choice !!
From the docs
FXML is an XML-based language that provides the structure for building
a user interface separate from the application logic of your code.
This separation of the presentation and application logic is
attractive to web developers because they can assemble a user
interface that leverages Java components without mastering the code
for fetching and filling in the data
So, FXML forces you to use a MVC pattern, keeping your presentation layer separate from the logic, making it easier for you to maintain and edit the presentation layer, and through UI designers, who have no relation to Java/JavaFX
For more information and example on FXML