import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.stage.Stage;

public class Hello extends Application {
    public void start(Stage stage) {
        stage.setTitle("Hello");

        final Canvas canvas = new Canvas(250, 50);
        GraphicsContext gc = canvas.getGraphicsContext2D();

        gc.fillText("HELLO WORLD!", 50, 25);

        Group root = new Group();
        root.getChildren().addAll(canvas);
        Scene scene = new Scene(root);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String... args) {
        launch(args);
    }
}