You should create a controller class for your FXML document, in which you can perform any functionality you need to perform involving the UI components. You can annotate fields in that class with @FXML
and they will be populated by the FXMLLoader
, matching the fx:id
attribute to the field name.
Work through the tutorial for more details, and have a look at the Introduction to FXML documentation.
Simple example:
Sample.fxml:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.Button?>
<VBox xmlns:fx="http://javafx.com/fxml/1" fx:controller="SampleController">
<Label fx:id="countLabel"/>
<Button fx:id="incrementButton" text="Increment" onAction="#increment"/>
</VBox>
SampleController.java:
import javafx.fxml.FXML;
import javafx.scene.control.Label;
public class SampleController {
private int count = 0 ;
@FXML
private Label countLabel ;
@FXML
private void increment() {
count++;
countLabel.setText("Count: "+count);
}
}
SampleMain.java:
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class SampleMain extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Scene scene = new Scene(FXMLLoader.load(getClass().getResource("Sample.fxml")), 250, 75);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
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