JavaFX source code

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.StackPane;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class sample extends Application {
  public static void main(String[] args) {
    launch();
  }

  public void start(Stage stage) throws Exception {
    GridPane gridPane = new GridPane();
    Text heading = new Text("Sample");
    heading.setFont(new Font(56));
    gridPane.add(heading, 0, 0);
    Scene scene = new Scene(gridPane);
    stage.setMaximized(true);
    stage.setScene(scene);
    stage.show();
  }
}