在 JavaFX 中更新 ListView 时出现 IndexOutOfBoundsException

Posted 2023-02-14

【中文标题】在 JavaFX 中更新 ListView 时出现 IndexOutOfBoundsException

【英文标题】：IndexOutOfBoundsException while updating a ListView in JavaFX

【发布时间】：2014-12-08 05:23:52

【问题描述】：

当我想在 JavaFX 中更新 ListView 时，我遇到了 IndexOutOfBoundsException 的问题。

我需要做什么

我有一个ListView，其中包含与小型模拟相对应的元素。通过单击一个列表元素，图形模拟会根据单击ListView 的元素进行更新。之后ListView 需要更新，其他元素将被显示。这意味着所有旧元素都将被删除，并且只会显示新元素。

我的代码是这样的：

public void init() 
    // simCont.initSimulation() returns ArrayList
    ObservableList<Default> obsDefaultList = FXCollections
            .observableArrayList(simCont.initSimulation());
    listTest.getItems().addAll(obsDefaultList);
    listTest.getSelectionModel().selectedItemProperty()
            .addListener(new ChangeListener<Default>() 

                @Override
                public void changed(
                        ObservableValue<? extends Default> observable,
                        Default oldValue, Default newValue) 
                    updateList(newValue);
                
            );


private void updateList(Default chosen) 
    ObservableList<Default> list = FXCollections
            .observableArrayList(simCont.doSimulationStep(chosen.getId()));
    listTest.getItems().clear();
    listTest.getItems().addAll(list);

首先显示了两个元素。当我点击其中一个时，ListView 会更新，但我得到的是 IndexOutOfBoundsException。

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)

调试令人困惑，因为我没有发现异常的原因。 我在网上搜索，但没有发现任何对我有用的东西。希望有人可以帮助我解决这个问题。

【问题讨论】：

最可能的原因是您对 listView 的数据执行了listTest.getItems().clear();。你应该处理这种情况，在你的听众中执行null check

感谢您的回复@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 显示错误位于 doSimulationStep() 的第 65 行

【参考方案1】：

有点晚了，但既然你仍然得到例外，这是我的两美分。我遇到了同样的错误，这对我有用。

您不能从非主线程更新 UI 元素。一种方法是创建一个 Runnable 并通过 runLater 将其安排在主线程上。

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

【讨论】：

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***.com/questions/13784333/…以获得更详细的示例。

我遇到了类似的问题，通过@Stormbringer 的建议解决了，谢谢！

【参考方案2】：

将可观察列表放在方法之外（就像普通字段一样）

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
                
        );

如果将列表绑定到可观察列表对象，则表会在可观察列表（此处为listData）时更改。你做错了什么每次都会创建一个新的可观察列表。

【讨论】：

您好，感谢您的回复。我现在已经更改了我的代码，但仍然抛出异常。我认为这是 SelectionModel 的问题。当我简单地将一个元素添加到列表中时，代码可以正常工作。但是，如果我从中删除任何内容，则会引发异常。有什么解决办法吗？

您能否提供更多代码。例如更改后的 doSimulationSet 和访问方法以及行号。类 SimulatorViewController 中第 65、107 和 94 行的代码。

【参考方案3】：

我在使用ComboBox 并尝试更新支持observablelist 时遇到了完全相同的问题。

我通过将ComboBox 更改为ChoiceBox 来修复它，现在我不再得到IndexOutOfBoundsException。

您是否尝试过使用其他容器？

【参考方案4】：

我认为您的情况与此答案类似：JavaFX ComboBox change value causes IndexOutOfBoundsException

试试

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

而不是updateList(newValue)

【参考方案5】：

在我的情况下，当我在我的 JavaFX 应用程序旁边打开 ScenicView 时发生了这个问题。关闭它解决了这个问题。