我正在使用JavaFX 8.我尝试过滤一个TableView并且我这样做了，但我还有一些其他功能，比如修改和删除表中的项目。添加过滤后，修改工作正常但删除不受支持!! 这是我实施的：
public void setMainApp(MainApp mainApp) {
this.mainApp = mainApp;
refreshCategories();
FilteredList<Product> filteredProducts = new FilteredList<>(mainApp.getProductData(), p -> true);
categoryCombo.getSelectionModel().selectedItemProperty().addListener((observable, oldValue, newValue) -> {
filteredProducts.setPredicate(product -> {
if (newValue == null || newValue.isEmpty() || newValue.equals("None"))
return true;
String lowerCaseFilter = newValue.toLowerCase();
if (product.getCategory().toLowerCase().indexOf(lowerCaseFilter) == -1) {
return false;
}
return true;
});
});
productTable.setItems(filteredProducts);
}
这是删除实现：
@FXML
private void handleDelete() {
int selectedIndex = productTable.getSelectionModel().getSelectedIndex();
if (selectedIndex >= 0) {
Action responce = Dialogs.create().title("Supprission").masthead("Supprission definitive")
.message("Êtes-vous sûre de vouloir supprimer ce produit?").actions(Dialog.Actions.OK, Dialog.Actions.CANCEL).showConfirm();
if (responce == Dialog.Actions.OK) {
Product product = productTable.getSelectionModel().getSelectedItem();
dao.removeProductByEntity(product);
productTable.getItems().remove(selectedIndex);
}
} else {
Dialogs.create().title("Pas de selection").masthead("Pas de produit Selectionné").message("S'il vous plait, selectionné un produit dans la liste.")
.showWarning();
}
}
这是导致异常的行：
productTable.getItems().remove(selectedIndex);
最后这是Exception消息：
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1762)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1645)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
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:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8216)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
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.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$45(GtkApplication.java:126)
at com.sun.glass.ui.gtk.GtkApplication$$Lambda$42/584634336.run(Unknown Source)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1759)
... 51 more
Caused by: java.lang.UnsupportedOperationException
at java.util.AbstractList.remove(AbstractList.java:161)
at dz.bilaldjago.homekode.controller.ProductOverviewController.handleDelete(ProductOverviewController.java:103)
... 61 more
我的主要问题是：ReadOnly列表是否可能接受修改而不是删除！ 我希望这一点清晰明白。
答案 0 :(得分：4)
我知道这是一个迟到的答案，但也许有人会发现它很有用。我今天偶然发现了这个问题。我正在开发一个应用程序，它将成为一个小型商店的简单仓库经理。主要部分是TableView组件，可以通过添加，删除或过滤项目来动态更新。
实际上，您不能向FilteredList添加od删除项，因为它会抛出UnsupportedOperationException，即使对于操作本身，您将使用基本的ObservableList包装它。可以做的是保持TableView项的单独ObservableList和FilteredList，如果需要更新，只更新第一个，而不是将其包装在FilteredList中，然后才将其用作TableView.setItems（）方法的源。 / p>
演示代码：
public class DynamicFilteredList {
@FXML
private TableView tableView;
@FXML
private TextField searchField;
private ObservableList tableItems;
private FilteredList filteredTableItems;
private void wrapListAndAddFiltering() {
//Wrap ObservableList into FilteredList
filteredTableItems = new FilteredList<>(tableItems, p -> true);
//Add change listener to searchField component to filter the table view
searchField.textProperty().addListener((observable, oldValue, newValue) -> {
filteredTableItems.setPredicate(item -> {
if (newValue == null || newValue.isEmpty()) {
return true;
}
String query = newValue.toLowerCase();
if (item.getName().toLowerCase().contains(query)) {
return true;
}
return false;
});
});
}
private void add(Item item) {
tableItems.add(item);
wrapListAndAddFiltering();
tableView.setItems(filteredTableItems);
}
private void remove(Item item) {
tableItems.remove(item);
wrapListAndAddFiltering();
tableView.setItems(filteredTableItems);
}
}
我在这种方法中看到的主要缺点是，对于非常大的列表，它可能是资源（尤其是内存）消耗，并且可能对应用程序的整体性能产生负面影响。
答案 1 :(得分：0)
我遇到了同样的问题，我发现可以使用
访问基础列表myFilteredList.getSource()
就我而言，我使用的是ObservableList，并且能够使用
从“源列表”中删除项目myFilteredList.getSource().remove(itemReference);
我希望这会有所帮助。