Dúvidas sobre primeiro projeto em JavaFX

@bruno.daniel escreveu:

Estou começando os estudos em JavaFX utilizando a ide Netbeans + SceneBuilder em conjunto e logo no primeiro projeto estou enfrentando um erro que não consigo decifrar.

Criei um "Novo Projeto >>> Aplicação FXML" e utilizei o SceneBuilder apenas para dar nomes (id's) aos dois componentes contidos na tela, um botão e um label.

Porem ao executar a aplicação tem sido exibido o seguinte erro:

Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication6(LauncherImpl.java:182)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
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 teste.Teste.start(Teste.java:22)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication13(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait6(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null4(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater5(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null9(WinApplication.java:191)
... 1 more
Exception running application teste.Teste
C:\Users\ALLINONE\Documents\NetBeansProjects\Teste\nbproject\build-impl.xml:1051: The following error occurred while executing this line:
C:\Users\ALLINONE\Documents\NetBeansProjects\Teste\nbproject\build-impl.xml:805: Java returned: 1
FALHA NA CONSTRUÇÃO (tempo total: 7 segundos)

O meu projeto tem apenas a classe Principal chamada Teste com o seguinte código:

package teste;

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

/**
 *
 * @author ALLINONE
 */
public class Teste extends Application {

    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));

      //  Scene scene = new Scene(root);

        stage.setScene(new Scene(root));
        stage.show();
    }

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

}

E a classe Control:

package teste;

import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;


 public class FXMLDocumentController implements Initializable {

@FXML
private Button btClick;
@FXML
private Label lbTexto;

@FXML
private void handleButtonAction(ActionEvent event) {
    System.out.println("You clicked me!");
    lbTexto.setText("Hello World!");
}

@Override
public void initialize(URL url, ResourceBundle rb) {


}    

    @FXML
    private void handleButtonAction(MouseEvent event) {

       System.out.println("You clicked me!");
       lbTexto.setText("Hello World!"); 
    }

}

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