JavaFX iniciante - Erro

Programação Java
#1

Bom dia.

Através do docs.oracle “da vida” deu o seguinte erro. Alguém já passou por isso?

Fontes em: http://docs.oracle.com/javase/8/javafx/sample-apps/FXMLExample.zip

Erro, abaixo:

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$147(Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$48/1732398722.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: javafx.fxml.LoadException:
/C:/Users/ricardo.munhoz/JavaNew/Tes001/bin/br/com/ricardo/fxml_example.fxml:43

at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
at javafx.fxml.FXMLLoader.access$700(Unknown Source)
at javafx.fxml.FXMLLoader$ValueElement.processAttribute(Unknown Source)
at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(Unknown Source)
at javafx.fxml.FXMLLoader$Element.processStartElement(Unknown Source)
at javafx.fxml.FXMLLoader$ValueElement.processStartElement(Unknown Source)
at javafx.fxml.FXMLLoader.processStartElement(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
at javafx.fxml.FXMLLoader.load(Unknown Source)
at br.com.ricardo.FXMLExample.start(FXMLExample.java:45)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$153(Unknown Source)
at com.sun.javafx.application.LauncherImpl$$Lambda$51/1223419242.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$166(Unknown Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$44/1051754451.run(Unknown Source)
at com.sun.javafx.application.PlatformImpl.lambda$null$164(Unknown Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$47/132371849.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$165(Unknown Source)
at com.sun.javafx.application.PlatformImpl$$Lambda$45/1775282465.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
... 1 more

Caused by: java.lang.ClassNotFoundException: fxmlexample.FXMLExampleController
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 28 more
Exception running application br.com.ricardo.FXMLExample

#2

Olá,

Mesmo problema que uma colega teve quando estava tentando compilar e executar uma aplicação Swing/AWT, e a palavra-chave é “Unknown Source”.

Lembre-se de pesquisar o fórum primeiro: http://www.guj.com.br/search?q=Unknown%20Source%20category%3A7

#3

@cviniciusm, o problema não é Uncknown Source … e sim, java.lang.NullPointerException: Location is required

Antes de “apelar”, procurei pelo GUJ e a única coisa que achei:

mas não procede.

Fiz uma alteração na linha … que achei pela Internet mas sem sucesso …:

Parent root = FXMLLoader.load(getClass().getClassLoader().getResource(“fxml_example.fxml”));

Se alguém tiver uma luz agradeço … e continuo pesquisando rsss

#4

Bom, é só trocar todo o trecho do método start para:

       Parent root = FXMLLoader.load(getClass().getResource("fxml_example.fxml"));
    
        Scene scene = new Scene(root, 300, 275);
    
        stage.setTitle("FXML Welcome");
        stage.setScene(scene);
        stage.show();

e funfou perfeitamente. É isso ae galera do GUJ :wink:

#5

Olá,

Também fiz download do código.

Abri o projeto no NetBeans 8.1 com JDK 8u77, compilei-o e o executei com sucesso, sem alterações.

#6

Boua @cviniciusm .

Realmente parece ser um “bug” no plug-in do Eclipse.

Como eu curto mais o Eclipse dei um jeito de “fazer funfar”. Mas é bom saber que o código funciona no Netbeans sem alterações.

Eh noixx

#7

Olá,

Também executei com sucesso no Eclipse Mars.2 + JDK8u77 + plugin e(fx)clipse 2.1.0 !