我有以下问题。
我有2个FXML控制器。 1.对于添加会员 2.对于添加关系
单击主程序create instance od second controller中的Add Relation Button。
在我添加新会员后运行程序一切正常。当我点击添加关系然后单击按钮取消或接受，接下来我去添加新成员我做SUBMIT，调用第二个控制器的初始化方法。我不明白为什么
@Override
public void initialize(URL url, ResourceBundle rb) {
log.trace(LogMessages.MSG_CTRL_INITIALIZATION);
this.languageBundle.setValue(rb);
relationType.setItems(FXCollections.observableArrayList(
RelationType.NEUTRAL,
RelationType.LOVE,
RelationType.FIANCE,
RelationType.MARRIED
));
/*
COMBOBOX CELL FACTORY
*/
setCellFactoryToCombobox(simLeftChoice);
setCellFactoryToCombobox(simRightChoice);
setCellFactoryToCombobox(childChoice);
setCellFactoryToRelationType(relationType);
toggleActiveButton.selectedProperty().addListener((observable, oldValue, newValue) -> {
if (newValue == true) {
toggleActiveButton.setText("Active");
} else {
toggleActiveButton.setText("Inactive");
}
});
toggleActiveButton.setSelected(true);
addLanguageListener();
addRegisterButtonDisableCondition();
/*
POPULATE COMBOBOX
*/
addSelectedMemberListener();
populateComboBox(context.getService().getCurrentFamily().getGtx_membersList().filtered(sexFilter(Sex.FEMALE)), simLeftChoice);
populateComboBox(context.getService().getCurrentFamily().getGtx_membersList().filtered(sexFilter(Sex.MALE)), simRightChoice);
populateComboBox(context.getService().getCurrentFamily().getGtx_membersList()
.filtered(p -> context.getService().getCurrentFamily().getBornRelation(p).isRacine()), childChoice);
simLeftChoice.getSelectionModel().selectFirst();
simRightChoice.getSelectionModel().selectFirst();
childChoice.getSelectionModel().selectFirst();
log.trace(LogMessages.MSG_CTRL_INITIALIZED);
}
我有一个错误：
populateComboBox(context.getService().getCurrentFamily().getGtx_membersList()
.filtered(p -> context.getService().getCurrentFamily().getBornRelation(p).isRacine()), childChoice);
这是堆栈跟踪：
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
at com.genealogytree.client.desktop.controllers.implementation.TabAddNewRelationPaneController.lambda$initialize$2(TabAddNewRelationPaneController.java:143)
at javafx.collections.transformation.FilteredList.addRemove(FilteredList.java:268)
at javafx.collections.transformation.FilteredList.sourceChanged(FilteredList.java:144)
at javafx.collections.transformation.TransformationList.lambda$getListener$15(TransformationList.java:106)
at javafx.collections.WeakListChangeListener.onChanged(WeakListChangeListener.java:88)
at com.sun.javafx.collections.ListListenerHelper$Generic.fireValueChangedEvent(ListListenerHelper.java:329)
at com.sun.javafx.collections.ListListenerHelper.fireValueChangedEvent(ListListenerHelper.java:73)
at javafx.collections.ObservableListBase.fireChange(ObservableListBase.java:233)
at javafx.collections.ListChangeBuilder.commit(ListChangeBuilder.java:482)
at javafx.collections.ListChangeBuilder.endChange(ListChangeBuilder.java:541)
at javafx.collections.ObservableListBase.endChange(ObservableListBase.java:205)
at javafx.collections.ModifiableObservableListBase.add(ModifiableObservableListBase.java:155)
at java.util.AbstractList.add(AbstractList.java:108)
at com.genealogytree.client.desktop.domain.GTX_Family.addMember(GTX_Family.java:55)
at com.genealogytree.client.desktop.service.implementation.LocalFamilyService.addMember(LocalFamilyService.java:71)
at com.genealogytree.client.desktop.controllers.implementation.TabAddNewMemberPaneController.addSimConfirm(TabAddNewMemberPaneController.java:131)
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:498)
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:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1771)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
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.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:8413)
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.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$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
问题不在于这个错误，而在于这个代码片段被称为
日志：
14:53:30.453 TRACE .c.d.c.i.TabAddNewRelationPaneController : Controller Initialized correctly
14:53:31.730 TRACE .c.d.c.i.TabAddNewRelationPaneController : Finalize
14:53:33.758 TRACE .g.c.d.c.i.TabAddNewMemberPaneController : Initialization controller
14:53:33.760 TRACE .g.c.d.c.i.TabAddNewMemberPaneController : Controller Initialized correctly
14:53:39.075 INFO c.g.c.d.s.i.LocalFamilyService : Add new Member [GTX_Member{version=LongProperty [value: 0], id=LongProperty [value: 0], name=StringProperty [value: jiji], surname=StringProperty [value: ijij], photo=StringProperty [value: null], age=YOUNG_ADULT, sex=MALE}]
Exception in thread "JavaFX Application Thread" java.lang.NullPointerException
14:53:39.076 INFO c.g.c.d.s.i.LocalFamilyService : Add new Member [GTX_Member{version=LongProperty [value: 0], id=LongProperty [value: 2], name=StringProperty [value: jiji], surname=StringProperty [value: ijij], photo=StringProperty [value: null], age=YOUNG_ADULT, sex=MALE}]
at com.genealogytree.client.desktop.controllers.implementation.TabAddNewRelationPaneController.lambda$initialize$2(TabAddNewRelationPaneController.java:143)
我已经进行了一些测试。
我改变了这样的代码：
populateComboBox(context.getService().getCurrentFamily().getGtx_membersList().filtered(this::isRacine), childChoice);
public boolean isRacine(GTX_Member p) {
System.out.println("IS RACINE CALLED");
log.error("RACINE LAMBDA CALLED");
return context.getService().getCurrentFamily().getBornRelation(p).isRacine();
}
现在我做了调试2个案例： a）断点在线填充组合框 b）关于谓词的断点
由于fabian提到程序只在谓词停止（在线断点不会导致停止执行）
但我仍然不明白为什么会这样。此时此控制器未激活。似乎会员的ObservableList上有一个Listener ..
那么，如何在调用Cancel方法时删除此侦听器？