i have an error and i cant figure what's bad

Question

Exception in Application start method
Exception in thread "main" java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javafx.fxml.LoadException: 
/C:/Users/Gamer/IdeaProjects/yo/out/production/yo/sample/sample.fxml:10

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2601)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2579)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at sample.Main.start(Main.java:23)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
    ... 1 more
Caused by: java.lang.IllegalArgumentException: Unable to coerce  fx:controller="sample.Controller" xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">  to class javafx.scene.Node.
    at com.sun.javafx.fxml.BeanAdapter.coerce(BeanAdapter.java:496)
    at javafx.fxml.FXMLLoader$ValueElement.getListValue(FXMLLoader.java:807)
    at javafx.fxml.FXMLLoader$ValueElement.processCharacters(FXMLLoader.java:879)
    at javafx.fxml.FXMLLoader.processCharacters(FXMLLoader.java:2836)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2537)
    ... 17 more

Answer 1 · 2017-01-05T23:16:05Z

January 5, 2017 11:16pm

Without seeing the code you have written, I cannot tell exactly what the issue is but based on the call stack you provided it appears that the error in your code is on line 23 in the Main.java file of your project.

Answer 2 · 2017-01-06T19:20:21Z

January 6, 2017 7:20pm

my main.java

package sample;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.fxml.FXMLLoader;
import javafx.scene.Group;
import javafx.scene.control.*;

import javafx.scene.layout.GridPane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.util.Objects;


public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        /*Group root = new Group();
        Text txt = new Text("Sup?");
        Button btn = new Button();
        TextField fld = new TextField();
        GridPane grid = new GridPane();
        VBox box = new VBox();
        Label label = new Label("Name:");

        btn.setText("Say sup!");
        btn.setOnAction(evt -> {
            System.out.printf("Sup %s! %n", fld.getText());
        });
        grid.add(fld, 1, 0);
        grid.add(label, 0, 0);
        grid.add(btn, 1, 1);
        grid.setHgap(20);
        grid.setGridLinesVisible(true);
        box.getChildren().addAll(txt, grid);
        root.getChildren().add(box);*/
        primaryStage.setTitle("Sup program");
        primaryStage.setScene(new Scene(root, 300, 275));
        primaryStage.show();
    }


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

<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.text.Text?>
<?import javafx.scene.control.TextField?>
<GridPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
    <Text text="Sup"
          GridPane.halignment="CENTER"
          GridPane.rowIndex="2"
          GridPane.columnSpan="0"/>
    <Button text="Say sup"
            GridPane.columnSpan="1"
            GridPane.rowIndex="2"/>
    <Label text="Name:"
           GridPane.columnSpan="0"
           GridPane.rowIndex="1" />
    <TextField fx:id = "name"
               GridPane.columnSpan="1"
               GridPane.rowIndex="1"
               GridPane.halignment="RIGHT"/>
</GridPane>

my sample.fxml

Answer 3 · 2017-05-17T15:44:09Z

May 17, 2017 3:44pm

I'm having the same issue. Did you ever find a solution?

Answer 4 · 2020-02-18T09:50:18Z

February 18, 2020 9:50am

They can remove this JavaFX part of intermediate course, unable to do it. A lot of erros appears, cant run app.

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Rokas Mazeika

Rokas Mazeika

i have an error and i cant figure what's bad

4 Answers

Ted Dunn

Ted Dunn

Rokas Mazeika

Rokas Mazeika

Sean Hayes

Sean Hayes

Gustáv Foltin

Gustáv Foltin