Hallo zusammen,
ich habe ein mehr oder weniger großes Problem:
Ich habe mit JavaFX eine Fxml-Datei geladen und möchte jetzt während der Laufzeit Daten zu einer ListView hinzufügen. Das wird mir aber immer mit einer Exception quittiert!
Meine Fxml-Datei:
und mein Versuch die Daten zu laden:
Nun bekomme ich wenn ich die Liste füllen will immer diese Exception:
Kann mir jemand einen Tipp geben wie ich das Problem lösen kann?
MFG
programmierer12
ich habe ein mehr oder weniger großes Problem:
Ich habe mit JavaFX eine Fxml-Datei geladen und möchte jetzt während der Laufzeit Daten zu einer ListView hinzufügen. Das wird mir aber immer mit einer Exception quittiert!
Meine Fxml-Datei:
Java:
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.Frame_Controller">
<children>
<MenuBar>
<menus>
<Menu mnemonicParsing="false" text="%key1">
<items>
<MenuItem mnemonicParsing="false" onAction="#schliessen" text="%key2" />
<MenuItem fx:id="abmelden" mnemonicParsing="false" onAction="#abmelden" text="%key41" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="%key3" />
<Menu mnemonicParsing="false" text="%key11">
<items>
<MenuItem disable="true" mnemonicParsing="false" text="%key9" />
<MenuItem disable="true" mnemonicParsing="false" text="%key10" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="%key4">
<items>
<MenuItem mnemonicParsing="false" text="%key6" />
<MenuItem mnemonicParsing="false" text="%key5" />
</items>
</Menu>
</menus>
</MenuBar>
<TabPane prefHeight="200.0" prefWidth="200.0" tabClosingPolicy="UNAVAILABLE">
<tabs>
<Tab text="Englisch">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<HBox prefHeight="171.0" prefWidth="600.0">
<children>
<ScrollPane prefHeight="200.0" prefWidth="300.0">
<content>
<ListView fx:id="englisch" prefHeight="171.0" prefWidth="300.0" />
</content>
</ScrollPane>
<ScrollPane prefHeight="200.0" prefWidth="300.0">
<content>
<ListView fx:id="englischVokabeln" prefHeight="171.0" prefWidth="300.0" />
</content>
</ScrollPane>
</children>
</HBox>
</children>
</AnchorPane>
</content>
</Tab>
<Tab text="Latein">
<content>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<HBox prefHeight="171.0" prefWidth="600.0">
<children>
<ScrollPane prefHeight="200.0" prefWidth="300.0">
<content>
<ListView fx:id="latein" prefHeight="171.0" prefWidth="300.0" />
</content>
</ScrollPane>
<ScrollPane prefHeight="200.0" prefWidth="300.0">
<content>
<ListView fx:id="lateinVokabeln" prefHeight="171.0" prefWidth="300.0" />
</content>
</ScrollPane>
</children>
</HBox>
</children>
</AnchorPane>
</content>
</Tab>
</tabs>
</TabPane>
</children>
</VBox>
und mein Versuch die Daten zu laden:
Java:
List<String> l = new ArrayList<String>();
l.add(new Vokabel("FRAGE", "ANTWORT").toString()); //Die Vokabel habe ich nur zum testen erstellt
ObservableList<String> list = FXCollections.observableList();
englisch.setItems(list);
Nun bekomme ich wenn ich die Liste füllen will immer diese Exception:
Java:
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Node.fireEvent(Unknown Source)
at javafx.scene.control.Button.fire(Unknown Source)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Unknown Source)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.notifyMouse(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)
at java.lang.Thread.run(Unknown Source)
Caused by: 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 sun.reflect.misc.Trampoline.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
... 48 more
Caused by: java.lang.NullPointerException
at application.Frame_Controller.karteikasten(Frame_Controller.java:124)
... 57 more
Kann mir jemand einen Tipp geben wie ich das Problem lösen kann?
MFG
programmierer12