why is the button not showing?

[wesley johnsen]

Hello,

I'am making a gridpane with labels, textfields and 1 button.
But the button is not showing.

How can I fix this?

Can someone help me?

thanks in advance

public class App extends Application {
    
    @Override
    public void start(Stage primaryStage) {
        
        GridPane grid = new GridPane();
        grid.setAlignment(Pos.CENTER);
        grid.setHgap(10);
        grid.setVgap(10);
        grid.setPadding(new Insets(25, 25, 25, 25));
        
        Text scenetitle = new Text("app");
        scenetitle.setFont(Font.font("Tahoma", FontWeight.NORMAL, 20));
        grid.add(scenetitle, 0, 0, 2, 1);

        Label aantalBeesten = new Label("Count 1:");
        grid.add(aantalBeesten, 0, 1);

        TextField TextFieldAantalBeesten = new TextField();
        grid.add(TextFieldAantalBeesten, 1, 1);

        Label aantalPlanten = new Label("Count 2:");
        grid.add(aantalPlanten, 0, 2);

        TextField TextFieldAantalPlanten = new TextField();
        grid.add(TextFieldAantalPlanten, 1, 2);
        
        Label aantalObstakels = new Label("Count 3:");
        grid.add(aantalObstakels, 0, 3);

        TextField TextFieldAantalObstakels = new TextField();
        grid.add(TextFieldAantalObstakels, 1, 3);
        
        Button btn = new Button();
        btn.setText("Say 'Hello World'");
        HBox hbBtn = new HBox(10);
        hbBtn.setAlignment(Pos.BOTTOM_RIGHT);
        btn.setOnAction(new EventHandler<ActionEvent>() { 

           
            @Override
            public void handle(ActionEvent event) {
                System.out.println("Hello World!");
            }
        });
        
        StackPane root = new StackPane();
        root.getChildren().add(btn);
        primaryStage.setScene(new Scene(grid, 500, 500));
        
        
        primaryStage.setTitle("app");
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }
}
    

[Norman Radder]

I don't know JavaFX but it looks to me like the components in root are not being added to the GUI that is being shown. The following change Scene will show the button, but not what is in grid.

    
        StackPane root = new StackPane();
        root.getChildren().add(btn);

        primaryStage.setScene(new Scene(root/*grid*/, 500, 500));

[Norman Radder]

What about adding the button to grid?