我正在尝试通过按下另一个FXML中的按钮来更新一个FXML中的TableView。
这是FXML的控制器，它有按钮：
public class GUIAddMemberPanelController
{
private GUIMainController mainController = new GUIMainController();
@FXML private TextField tfEnterMemberName,tfEnterMemberEmail;
@FXML private Button btnAddMember,btnClearAddMemberTextFields,btnCancelAddMemberPanel;
public void addMember(ActionEvent event) throws ParseException, IOException, CloneNotSupportedException
{
String memberName = tfEnterMemberName.getText();
String memberEmail = tfEnterMemberEmail.getText();
member = new Member(memberName,memberEmail);
memberList.addMemberToList(member);
memberFile.writeMemberTextFile(memberList);
clearAddMemberTextFields(event);
mainController.refreshMemberTable();
}
这是具有TableView的主控制器：
public class GUIMainController
{
@FXML private TableView<Member> tableMembers;
@FXML private TableColumn<Member, String> tcMemberName;
@FXML private TableColumn<Member, String> tcMemberEmail;
public void initialize() throws FileNotFoundException, ParseException
{
refreshMemberTable();
}
public void refreshMemberTable() throws ParseException, FileNotFoundException
{
tcMemberName.setCellValueFactory(new PropertyValueFactory<Member, String>("name"));
tcMemberEmail.setCellValueFactory(new PropertyValueFactory<Member, String>("email"));
tableMembers.setItems(getList());
tableMembers.setEditable(true);
}
public ObservableList<Member> getList() throws FileNotFoundException, ParseException
{
ObservableList<Member> members = FXCollections.observableArrayList();
MemberList memberList = memberFile.readMemberTextFile();
for (int i = 0; i < memberList.size(); i++)
{
members.add(new Member(memberList.getMember(i).getName(), memberList.getMember(i).getEmail()));
}
return members;
}
}
点击按钮后，它给了我一堆错误：
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$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.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.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$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.Trampoline.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
... 48 more
Caused by: java.lang.NullPointerException
at GUIMainController.refreshMemberTable(GUIMainController.java:275)
at GUIAddMemberPanelController.addMember(GUIAddMemberPanelController.java:36)
... 58 more
非常感谢任何帮助，谢谢。
更新
我试图通过fabian提出建议的问题，但遇到了更多的困惑。任何人都可以指出我在这里做错了什么？感谢
public void addMember(ActionEvent event) throws ParseException, CloneNotSupportedException, IOException
{
String memberName = tfEnterMemberName.getText();
String memberEmail = tfEnterMemberEmail.getText();
member = new Member(memberName,memberEmail);
memberList.addMemberToList(member);
memberFile.writeMemberTextFile(memberList);
refreshMemberList();
}
public void refreshMemberList() throws FileNotFoundException, ParseException
{
FXMLLoader loader = new FXMLLoader(getClass().getResource("FXML/viaGUI.fxml"));
GUIMainController controller = loader.<GUIMainController>getController();
loader.setController(controller);
controller.refreshMemberTable();
}
这里我加载了主要的FXML：
public class MainClass extends Application
{
public static void main(String[] args)
{
launch(args);
}
public void start(Stage stage) throws Exception
{
FXMLLoader loader = new FXMLLoader();
loader.setController(new GUIMainController());
loader.setLocation(getClass().getResource("FXML/viaGUI.fxml"));
Parent root = loader.load();
Scene scene = new Scene(root);
stage.setTitle("VIA - Event Management System");
stage.setScene(scene);
stage.show();
}
}