Java tutorial
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.layout.Region; import javafx.scene.layout.StackPane; import javafx.scene.paint.Color; import javafx.scene.shape.Rectangle; import javafx.stage.Stage; public class Main extends Application { @Override public void start(Stage stage) { Group group = new Group(); Scene scene = new Scene(group); StackPane stack = new StackPane(); stack.setMaxSize(Region.USE_PREF_SIZE, Region.USE_PREF_SIZE); stack.getChildren().addAll(new Rectangle(100, 100, Color.BLUE)); group.getChildren().add(stack); stage.setTitle("Welcome to JavaFX!"); stage.setScene(scene); stage.sizeToScene(); stage.show(); } public static void main(String[] args) { Application.launch(args); } }