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在JavaFX中更新ListView时发生IndexOutOfBoundsException

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在JavaFX中更新ListView时发生IndexOutOfBoundsException,listview,javafx,indexoutofboundsexception,Listview,Javafx,Indexoutofboundsexception,当我想在JavaFX中更新一个列表视图时，我遇到了一个IndexOutOfBoundsException问题 我需要做什么 我有一个列表视图，其中的元素对应于一个小的模拟。单击一个列表元素，图形模拟将根据列表视图的单击元素更新。之后，列表视图需要更新，并显示其他元素。这意味着所有旧的元素都将被删除，而只显示新的元素 我的代码如下所示： 调试很混乱，因为我没有发现异常的原因。 我在网上搜索，但没有找到对我有用的东西。希望有人能帮我解决这个问题。将可观察列表放在方法之外（就像普通字段一样） Obse

当我想在JavaFX中更新一个
列表视图时，我遇到了一个
IndexOutOfBoundsException
问题

我需要做什么
我有一个
列表视图
，其中的元素对应于一个小的模拟。单击一个列表元素，图形模拟将根据
列表视图的单击元素更新。之后，
列表视图
需要更新，并显示其他元素。这意味着所有旧的元素都将被删除，而只显示新的元素

我的代码如下所示：
调试很混乱，因为我没有发现异常的原因。

我在网上搜索，但没有找到对我有用的东西。希望有人能帮我解决这个问题。
将可观察列表放在方法之外（就像普通字段一样）


ObservableList listData=FXCollections.observableArrayList（）
公共void初始化（Url、ResourceBundle rb）{
addAll（myService.getFoo）；
setItems（listData）；
//如果使用Java8，您可以在这里使用lambdas
listTest.getSelectionModel.selectedItemProperty（）
.addListener（新的ChangeListener（）{
@凌驾

public void changed（observeValue我在使用
组合框
并尝试更新backing
observeList
时遇到了完全相同的问题

我通过将
组合框
更改为
选择框
来修复它，现在我不再获得
索引自动边界异常


您尝试使用其他容器了吗？
有点晚了，但是由于您仍然得到异常，这是我的两分钱。我得到了相同的错误，这是我的工作原理

您不能从非主线程更新UI元素。一种方法是使UI元素可运行，并通过runLater在主线程上计划它


Platform.runLater(new Runnable() {
    @Override public void run() {
//put your code here
}});



我认为你的回答与此类似：

试一试


在我的例子中，当在JavaFX应用程序旁边打开ScenicView时，出现了此问题，而不是
updateList（newValue）
。关闭它解决了问题。
最可能的原因是您执行了
listTest.getItems（）.clear（）；
在listView的数据上。您应该在监听器中执行
空检查来处理这种情况谢谢您的回复@ItachiUchiha。不幸的是，空检查并不能解决问题。我在被调用的方法和监听器中检查了它。stackTrace显示错误在
剂量模拟步骤（）的第65行
您好，谢谢您的回复。我现在已根据更改了代码，但仍然引发异常。我认为SelectionModel存在问题。当我只向列表中添加一个元素时，代码工作正常。但是如果我从中删除任何内容，则异常为thorwn。是否有任何解决方法？您能否提供更多代码。例如，更改的，doSimulationSet和access方法以及SimulatorViewController类中第65行、107行和94行的行号和代码。这种方法从我的TableView应用程序中删除了相同类型的异常。对于不太熟悉java的人，我建议阅读更详细的示例。我有类似的问题，用@Stormbri解决了谢谢你的建议！

Exception in thread "JavaFX Application Thread" java.lang.IndexOutOfBoundsException
at com.sun.javafx.scene.control.ReadOnlyUnbackedObservableList.subList(ReadOnlyUnbackedObservableList.java:136)
at javafx.collections.ListChangeListener$Change.getAddedSubList(ListChangeListener.java:242)
at com.sun.javafx.scene.control.behavior.ListViewBehavior.lambda$new$174(ListViewBehavior.java:258)
at com.sun.javafx.scene.control.behavior.ListViewBehavior$$Lambda$145/442103778.onChanged(Unknown Source)
at javafx.collections.WeakListChangeListener.onChanged(WeakListChangeListener.java:88)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at com.sun.javafx.scene.control.ReadOnlyUnbackedObservableList.callObservers(ReadOnlyUnbackedObservableList.java:75)
at javafx.scene.control.MultipleSelectionModelBase.clearAndSelect(MultipleSelectionModelBase.java:331)
at com.sun.javafx.scene.control.behavior.CellBehaviorBase.simpleSelect(CellBehaviorBase.java:242)
at com.sun.javafx.scene.control.behavior.CellBehaviorBase.doSelect(CellBehaviorBase.java:206)
at com.sun.javafx.scene.control.behavior.CellBehaviorBase.mousePressed(CellBehaviorBase.java:132)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:95)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3724)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3452)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1728)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2461)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:348)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:273)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:382)
at com.sun.glass.ui.View.handleMouseEvent(View.java:553)
at com.sun.glass.ui.View.notifyMouse(View.java:925)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)


Exception in thread "JavaFX Application Thread" java.lang.IndexOutOfBoundsException: Index: 3, Size: 3
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at de.hhn.unitylab.controller.SimulationController.doSimulationStep(SimulationController.java:65)
at de.hhn.unitylab.ui.SimulatorViewController.updateList(SimulatorViewController.java:107)
at de.hhn.unitylab.ui.SimulatorViewController.access$0(SimulatorViewController.java:105)
at de.hhn.unitylab.ui.SimulatorViewController$1.changed(SimulatorViewController.java:94)
at de.hhn.unitylab.ui.SimulatorViewController$1.changed(SimulatorViewController.java:1)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyObjectWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyObjectWrapper.java:176)
at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:142)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:112)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:145)
at javafx.scene.control.SelectionModel.setSelectedItem(SelectionModel.java:102)
at javafx.scene.control.MultipleSelectionModelBase.lambda$new$34(MultipleSelectionModelBase.java:67)
at javafx.scene.control.MultipleSelectionModelBase$$Lambda$127/2138925075.invalidated(Unknown Source)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:137)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:176)
at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:142)
at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:113)
at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:146)
at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:68)
at javafx.scene.control.MultipleSelectionModelBase.select(MultipleSelectionModelBase.java:357)
at javafx.scene.control.ListView.lambda$new$156(ListView.java:374)
at javafx.scene.control.ListView$$Lambda$126/1092624378.invalidated(Unknown Source)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:349)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyBooleanPropertyBase.fireValueChangedEvent(ReadOnlyBooleanPropertyBase.java:72)
at javafx.scene.Node$FocusedProperty.notifyListeners(Node.java:7526)
at javafx.scene.Scene$13.invalidated(Scene.java:2046)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:111)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:145)
at javafx.scene.Scene$KeyHandler.setFocusOwner(Scene.java:3891)
at javafx.scene.Scene$KeyHandler.requestFocus(Scene.java:3938)
at javafx.scene.Scene$KeyHandler.access$1900(Scene.java:3877)
at javafx.scene.Scene.requestFocus(Scene.java:2010)
at javafx.scene.Node.requestFocus(Node.java:7687)
at com.sun.javafx.scene.control.behavior.ListViewBehavior.mousePressed(ListViewBehavior.java:360)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:95)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3724)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3452)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1728)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2461)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:348)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:273)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:382)
at com.sun.glass.ui.View.handleMouseEvent(View.java:553)
at com.sun.glass.ui.View.notifyMouse(View.java:925)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(WinApplication.java:102)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)



ObservableList<Default> listData = FXCollections.observableArrayList()

public void initialize(Url url, ResourceBundle rb) {
    listData.addAll(myService.getFoo);
    listTest.setItems(listData);

    //You could use lambdas here if you use Java8
    listTest.getSelectionModel.selectedItemProperty()
        .addListener(new ChangeListener<Default>(){

            @Override
            public void changed(ObservableValue<? extends Default> observable,
                        Default oldValue, Default newValue) {
                    //Update the graphical simulations somewhere here
                    listData.clear();
                    listData.add(new Default(..)); //Add new values to list
                }
        });
}



Platform.runLater(new Runnable() {
    @Override public void run() {
//put your code here
}});



Platform.runLater(() -> updateList(newValue) )