多次更改场景的JavaFX错误
目标是使用动作事件根据菜单选择更改场景 此文件适用于第一次更改：多次更改场景的JavaFX错误,java,javafx,Java,Javafx,目标是使用动作事件根据菜单选择更改场景 此文件适用于第一次更改： 文件>最后一个 文件>主页 文件>然后出错 在抛出下面的异常之后，我的代码是否有什么问题阻止它工作 Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: The owner node needs to be associated with a window at javafx.stage.PopupWindow.s
- 文件>最后一个
- 文件>主页
- 文件>然后出错
Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: The owner node needs to be associated with a window
at javafx.stage.PopupWindow.show(PopupWindow.java:384)
at javafx.scene.control.ContextMenu.doShow(ContextMenu.java:287)
at javafx.scene.control.ContextMenu.show(ContextMenu.java:262)
at com.sun.javafx.scene.control.skin.MenuButtonSkinBase.show(MenuButtonSkinBase.java:171)
at com.sun.javafx.scene.control.skin.MenuButtonSkinBase.handleControlPropertyChanged(MenuButtonSkinBase.java:199)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase.lambda$registerChangeListener$61(BehaviorSkinBase.java:197)
at com.sun.javafx.scene.control.MultiplePropertyChangeListenerHandler$1.changed(MultiplePropertyChangeListenerHandler.java:55)
at javafx.beans.value.WeakChangeListener.changed(WeakChangeListener.java:89)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:361)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyBooleanPropertyBase.fireValueChangedEvent(ReadOnlyBooleanPropertyBase.java:72)
at javafx.beans.property.ReadOnlyBooleanWrapper.fireValueChangedEvent(ReadOnlyBooleanWrapper.java:103)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:110)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:144)
at javafx.scene.control.MenuButton.setShowing(MenuButton.java:218)
at javafx.scene.control.MenuButton.show(MenuButton.java:286)
at com.sun.javafx.scene.control.skin.MenuBarSkin.lambda$rebuildUI$398(MenuBarSkin.java:641)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:361)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ReadOnlyBooleanPropertyBase.fireValueChangedEvent(ReadOnlyBooleanPropertyBase.java:72)
at javafx.beans.property.ReadOnlyBooleanWrapper.fireValueChangedEvent(ReadOnlyBooleanWrapper.java:103)
at javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:110)
at javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:144)
at javafx.scene.control.Menu.setShowing(Menu.java:210)
at javafx.scene.control.Menu.show(Menu.java:408)
at com.sun.javafx.scene.control.skin.MenuBarSkin.lambda$rebuildUI$401(MenuBarSkin.java:677)
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:54)
at javafx.event.Event.fireEvent(Event.java:198)
你不应该改变场景。相反，使用FXMLLoader返回的
父对象@Override
public void start(Stage primaryStage) {
try {
BorderPane root = new BorderPane();
Scene scene = new Scene(root, 400, 400);
FXMLLoader loader1 = new FXMLLoader(getClass().getResource("panel.fxml"));
AnchorPane pane1 = loader1.load();
FXMLLoader loader2 = new FXMLLoader(getClass().getResource("panel2.fxml"));
AnchorPane pane2 = loader2.load();
// Create the MenuBar
MenuBar menuBar = new MenuBar();
Menu file = new Menu("File");
MenuItem home = new MenuItem("Home");
home.setOnAction(e -> root.setCenter(pane1));
MenuItem last20 = new MenuItem("last 20");
last20.setOnAction(e -> root.setCenter(pane2));
MenuItem exit = new MenuItem("exit");
exit.setOnAction(actionEvent -> Platform.exit());
file.getItems().addAll(home,last20,new SeparatorMenuItem(),exit);
menuBar.getMenus().addAll(file);
// Top is always the MenuBar
root.setTop(menuBar);
// Load Home on startup
root.setCenter(pane1);
primaryStage.setScene(scene);
primaryStage.setResizable(false);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
BorderPane父对象更新
@Override
public void start(Stage primaryStage) {
try {
BorderPane root = new BorderPane();
Scene scene = new Scene(root, 400, 400);
FXMLLoader loader1 = new FXMLLoader(getClass().getResource("panel.fxml"));
AnchorPane pane1 = loader1.load();
FXMLLoader loader2 = new FXMLLoader(getClass().getResource("panel2.fxml"));
AnchorPane pane2 = loader2.load();
// Create the MenuBar
MenuBar menuBar = new MenuBar();
Menu file = new Menu("File");
MenuItem home = new MenuItem("Home");
home.setOnAction(e -> root.setCenter(pane1));
MenuItem last20 = new MenuItem("last 20");
last20.setOnAction(e -> root.setCenter(pane2));
MenuItem exit = new MenuItem("exit");
exit.setOnAction(actionEvent -> Platform.exit());
file.getItems().addAll(home,last20,new SeparatorMenuItem(),exit);
menuBar.getMenus().addAll(file);
// Top is always the MenuBar
root.setTop(menuBar);
// Load Home on startup
root.setCenter(pane1);
primaryStage.setScene(scene);
primaryStage.setResizable(false);
primaryStage.show();
} catch(Exception e) {
e.printStackTrace();
}
}
主要方法是不相关的这是它的全部（Application.launch（args）；），根目录应该如何更新？请检查我的答案，我无法在评论中解释它。