javafx - 尝试将数据添加到 JavaFX 中的表时出错
问题描述
我在通过文本字段和使用 fxml 创建的“添加”按钮向表中添加数据时遇到问题。使用我的代码,我得到一个 java.lang.reflect.InvocationTargetException 错误。唯一可行的方法是直接使用 observableList 添加数据。我尝试执行以下教程,但使用 fxml:https ://docs.oracle.com/javase/8/javafx/user-interface-tutorial/table-view.htm#CJAGAAEE
我有点疑惑,直接往observableList中插入数据的时候,是插入到表中的,但是当我通过按钮往observableList中插入数据的时候,就不行了。
我希望我能够清楚地解释我的问题并期待任何答案。
public class CourseController {
@FXML
private ResourceBundle resources;
@FXML
private URL location;
@FXML
private TableView<CourseModel> myTable;
@FXML
private TableColumn<CourseModel, String> columnName;
@FXML
private TableColumn<CourseModel, Integer> columnTeilnehmer;
@FXML
private TableColumn<CourseModel, String> columnProfessor;
@FXML
private TextField textFieldCourseName;
@FXML
private TextField textFieldTeilnehmer;
@FXML
private TextField textFieldProfessor;
@FXML
private Button btnAdd;
final ObservableList<CourseModel> CourseModelList =
FXCollections.observableArrayList(
new CourseModel("Jacob", 200, "jacob.smith@example.com"),
new CourseModel("Isabella", 100, "isabella.johnson@example.com"));
@FXML
void addData(ActionEvent event) {
CourseModelList.add(new CourseModel(textFieldCourseName.getText(),Integer.parseInt(textFieldCourseName.getText()), columnProfessor.getText()));
textFieldCourseName.clear();
textFieldTeilnehmer.clear();
textFieldProfessor.clear();
//myTable.getItems().add((CourseModel) CourseModelList);
}
@FXML
void initialize() {
assert myTable != null : "fx:id=\"myTable\" was not injected: check your FXML file 'Course.fxml'.";
assert columnName != null : "fx:id=\"columnName\" was not injected: check your FXML file 'Course.fxml'.";
assert columnTeilnehmer != null : "fx:id=\"columnTeilnehmer\" was not injected: check your FXML file 'Course.fxml'.";
assert columnProfessor != null : "fx:id=\"columnProfessor\" was not injected: check your FXML file 'Course.fxml'.";
assert textFieldCourseName != null : "fx:id=\"textFieldCourseName\" was not injected: check your FXML file 'Course.fxml'.";
assert textFieldTeilnehmer != null : "fx:id=\"textFieldTeilnehmer\" was not injected: check your FXML file 'Course.fxml'.";
assert textFieldProfessor != null : "fx:id=\"textFieldProfessor\" was not injected: check your FXML file 'Course.fxml'.";
assert btnAdd != null : "fx:id=\"btnAdd\" was not injected: check your FXML file 'Course.fxml'.";
columnName.setCellValueFactory(new PropertyValueFactory<>("StudentId"));
columnTeilnehmer.setCellValueFactory(new PropertyValueFactory<>("FirstName"));
columnProfessor.setCellValueFactory(new PropertyValueFactory<>("LastName"));
//add your data to the table here.
myTable.setItems(CourseModelList);
}
}
public class CourseModel {
private SimpleStringProperty columnName;
private SimpleIntegerProperty columnTeilnehmer;
private SimpleStringProperty columnProfessor;
public CourseModel(String columnName, int columnTeilnehmer, String columnProfessor) {
this.columnName = new SimpleStringProperty(columnName);
this.columnTeilnehmer = new SimpleIntegerProperty(columnTeilnehmer);
this.columnProfessor = new SimpleStringProperty(columnProfessor);
}
public String getStudentId() {
return columnName.get();
}
public void setStudentId(String columnName) {
this.columnName = new SimpleStringProperty(columnName);
}
public int getFirstName() {
return columnTeilnehmer.get();
}
public void setFirstName(int columnTeilnehmer) {
this.columnTeilnehmer = new SimpleIntegerProperty(columnTeilnehmer);
}
public String getLastName() {
return columnProfessor.get();
}
public void setLastName(String columnProfessor) {
this.columnProfessor = new SimpleStringProperty(columnProfessor);
}
}
错误信息:
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$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
... 45 more
Caused by: java.lang.NumberFormatException: For input string: "wsedfwef"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:580)
at java.lang.Integer.parseInt(Integer.java:615)
at controllers.CourseController.addData(CourseController.java:56)
... 55 more
解决方案
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