D�vidas sobre primeiro projeto em JavaFX

Java

10/09/2016

Bom dia galera,

Estou come�ando os estudos em JavaFX utilizando a ide Netbeans + SceneBuilder em conjunto e logo no primeiro projeto estou enfrentando um erro que n�o consigo decifrar. Criei um "Novo Projeto >>> Aplica��o FXML" e utilizei o SceneBuilder apenas para dar nomes (id's) aos dois componentes contidos na tela, um bot�o e um label.

Porem ao executar a aplica��o 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$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$156(LauncherImpl.java:182)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException: Location is required.
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
	at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
	at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
	at teste.Teste.start(Teste.java:22)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$163(LauncherImpl.java:863)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$176(PlatformImpl.java:326)
	at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
	at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
	at com.sun.glass.ui.win.WinApplication.lambda$null$149(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 CONSTRU��O (tempo total: 7 segundos)

O meu projeto tem apenas a classe Principal chamada Teste com o seguinte c�digo:

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;

/**
 *
 * @author ALLINONE
 */
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!"); 
    }
    
}

E o arquivo fxml


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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.60" fx:controller="teste.FXMLDocumentController">
    <children>
        <Button fx:id="btClick" layoutX="126" layoutY="90" onAction="#handleButtonAction" onMouseClicked="#handleButtonAction" text="Click Me!" />
        <Label fx:id="lbTexto" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
    </children>
</AnchorPane>

Desde j� agrade�o por qualquer ajuda.

Bruno Silva

Curtidas 0

Respostas

Rene Tsugawa

10/09/2016

Bom dia.

Testei o seu projeto e n�o apresentou erro, funcionou corretamente.

Mas para tente remover a id do AnchorPane, pois o mesmo n�o � utilizado no Controller e isso pode gerar erros.

GOSTEI 0

Bruno Silva

10/09/2016

Mesmo tirando o id do AnchorPane continua com o mesmo erro Rene, quando ele come�a a compilar est� dando essa mensagem,acabei me esquecendo de colocar antes da Exception que ocorre.

ant -f C:\\\\Users\\\\ALLINONE\\\\Documents\\\\NetBeansProjects\\\\Teste -Djavac.includes=teste/Teste.java -Dnb.internal.action.name=run.single -Drun.class=teste.Teste run-single
init:
Deleting: C:\\Users\\ALLINONE\\Documents\\NetBeansProjects\\Teste\\build\\built-jar.properties
deps-jar:
Updating property file: C:\\Users\\ALLINONE\\Documents\\NetBeansProjects\\Teste\\build\\built-jar.properties
Compiling 1 source file to C:\\Users\\ALLINONE\\Documents\\NetBeansProjects\\Teste\\build\\classes
compile-single:
run-single:

N�o sei se tem alguma coisa que poderia influenciar tamb�m em termos de configura��o, pois nunca havia mexido com JavaFx, mas eu fiz uma altera��o na seguinte configura��o do NetBeans, fui em "Ferramentas >>> Op��es >>> Java >>> JavaFX" e apontei o Home Page do Scene Builder para a minha area de trabalho do windows, n�o sei se isso poderia estar influenciando ou impedindo que o projeto rode...

Desde j� agrade�o por qualquer ajuda.

GOSTEI 0

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