CODEWITHSUNDEEP
javajavafxjavafx-8fxml
Zunon
Zunon

Reputation: 137

Why can't I launch this simple FXML hello world application?

I am currently in the process of migrating my hastily-made JavaFX application layout from Java to FXML so I can worry about the style, view, controller, and model all seperately, but I can't seem to able to run a simple hello world application.

I get the following error:

 Exception in Application start method
 java.lang.reflect.InvocationTargetException

Here is the View.fxml file

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<VBox prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml" fx:controller="calend.ae.Controller">

    <Label text="I love bacon"/>
    <Button text="Submit"/>

</VBox>

and the main class

package calend.ae;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class Model extends Application {

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

    @Override
    public void start(Stage stg) throws Exception{
        Parent tabs = FXMLLoader.load(getClass().getResource("View.fxml"));
        stg.setTitle("Hello World");
        stg.setScene(new Scene(tabs, 450, 250));
        stg.show();
    }
}

You can find the entirety of the source code here. I only want to know why it doesn't run, for context here is the actual application

Here is the full stack trace:

Exception in Application start method
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unknown Source)
    at com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(Unknown Source)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Location is required.
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.load(Unknown Source)
    at calend.ae.Model.start(Model.java:17)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(Unknown Source)
    at com.sun.javafx.application.PlatformImpl.lambda$null$173(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(Unknown Source)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$148(Unknown Source)
    ... 1 more
Exception running application calend.ae.Model
Picked up _JAVA_OPTIONS: -Xmx512M

Upvotes: 3

Views: 862

Answers (1)

George Moralis
George Moralis

Reputation: 516

using maven or ant?

If you use ant the fxml should go in the same dir where Model.java is

Upvotes: 1

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