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    JavaFX FXML

    JavaFX FXML is defined as a GUI format with XML-based language launched by Oracle Corporation that enables to compose of the GUIs’ layout or the application of GUIs. The Primary purpose of FXML is to define a user interface. Placing XML mark-up here is to describe a component of UI in the hierarchy structure. A controller takes managing interactions by defining components and link them with them. FXML file has an extension .fxml and it is loaded by FXML Loader by JavaFX,

    Syntax

    JavaFX FXML is created as below

    < ?xml version="1.0" encoding="UTF-8"?>
    < ?import javafx.scene.layout.VBox?>
    < ?import javafx.scene.control.Button?>
    < VBox>
    < children>
    < Button text="This is my official website on FXML"/>
    < /children>
    < /VBox>
    	

    Features

    1. They have a large set of built-in GUI components like checkboxes; buttons also come with a built-in charts library to create charts.
    2. JavaFX FXML is an XML mark-up language and has a rich set of APIs. It’s a powerful tool and keeps the code easier. Used to develop rich Internet applications using java Files.
    3. JavaFX has CSS styling and gives a declarative layout through FXML.
    4. FXML uses namespaces with the prefix ‘fx’ in which all elements and attributes are assigned. Also, well simple to debug and modify.

    JavaFX FXML work

    JavaFX is used to create the Desktop Application, which allows to code the User-interface by making the application easier. In FXML XML elements are a class, script, property, static. A typical JavaFX FXML works like below:

    • FXML document has a user interface of an FXML application.
    • FXML Controller handles all the event handling process.
    • Next, FXML Loader parses the given FXML document and creates a graph. Simultaneously the Main Class initiates the execution of a Program.

    For example, when a user accessing a website, he/she checks with the updated information of their needs; therefore, we need to recompile a code. In such a case FXML controller plays a role.

    Deploying the first JavaFx application is needed. To take up the process:

    Setting Up a New Project by clicking the JavaFX FXML application. The IDE is sectored into three sections.

    • Java file:

      This takes up a java code for an application (Main Application)

    • .fxml file:

      Here FXML source file is created to define a user interface part.

    • java:

      This part includes an event handling process like a mouse and keyboard clicks.

    Examples

    FXMLsample.java

    package fxmlsample;
    import javafx.application.Application;
    import javafx.fxml.FXMLLoader;
    import javafx.scene.Parent;
    import javafx.scene.Scene;
    import javafx.stage.Stage;
    public class FXMLsample extends Application {
    @Override
    public void start(Stage st) throws Exception {
    Parent root = FXMLLoader.load(getClass().getResource("FXMLdoc.fxml"));
    Scene sc = new Scene(root, 200, 215);
    st.setTitle("FXML Welcome");
    st.setScene(sc);
    st.show();
    }
    public static void main(String[] args) {
    launch(args);
    }
    }
    

    A simple FXML file containing Grid Pane and text content and by default associated with controller class.

    FXMLdoc.fxml

    < ?xml version="1.0" encoding="UTF-8"?>
    < ?import java.net.*?>
    < ?import javafx.geometry.*?>
    < ?import javafx.scene.control.*?>
    < ?import javafx.scene.layout.*?>
    < ?import javafx.scene.text.*?>
    < Text text="Welcome Page"
    GridPane.columnIndex="0" GridPane.rowIndex="0"
    GridPane.columnSpan="3"/>
    < GridPanefx:controller="FXMLdoc.FXML_ctrl"
    xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="9" vgap="9">
    < padding>< Insets top="22" right="22" bottom="12" left="22"/>< /padding>
    < /GridPane>
    

    Next is the controller class with the response to the FXML file for the UI application

    FXML_ctrl.java

    packageFXMLsample;
    import javafx.event.ActionEvent;
    import javafx.fxml.FXML;
    import javafx.scene.text.Text;
    import javafx.scene.control.Label;
    public class FXML_ctrl {
    @FXML private Text actiontarget;
    @FXML protected void handleSubmitButtonAction(ActionEvent event) {
    actiontarget.setText("Submit the button");
    }
    }
    

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